/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/array-examples/standard_partition_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:47:29,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:47:29,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:47:29,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:47:29,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:47:29,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:47:29,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:47:29,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:47:29,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:47:29,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:47:29,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:47:29,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:47:29,186 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:47:29,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:47:29,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:47:29,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:47:29,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:47:29,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:47:29,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:47:29,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:47:29,209 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 17:47:29,216 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:47:29,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:47:29,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:47:29,217 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:47:29,217 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:47:29,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:47:29,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:47:29,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:47:29,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:47:29,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:47:29,217 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:47:29,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:47:29,217 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:47:29,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:47:29,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:47:29,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:47:29,218 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:47:29,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:47:29,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:47:29,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:47:29,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:47:29,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:47:29,218 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:47:29,218 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:47:29,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:47:29,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:47:29,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:47:29,427 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:47:29,429 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:47:29,430 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_ground-1.i [2022-01-31 17:47:29,475 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd886fc9d/850186ad79e34cb5bbe5cd5ad29d739e/FLAG70bead7c6 [2022-01-31 17:47:29,816 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:47:29,816 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partition_ground-1.i [2022-01-31 17:47:29,820 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd886fc9d/850186ad79e34cb5bbe5cd5ad29d739e/FLAG70bead7c6 [2022-01-31 17:47:29,832 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd886fc9d/850186ad79e34cb5bbe5cd5ad29d739e [2022-01-31 17:47:29,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:47:29,835 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:47:29,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:47:29,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:47:29,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:47:29,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:47:29" (1/1) ... [2022-01-31 17:47:29,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@484c591c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:29, skipping insertion in model container [2022-01-31 17:47:29,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:47:29" (1/1) ... [2022-01-31 17:47:29,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:47:29,857 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:47:29,957 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partition_ground-1.i[860,873] [2022-01-31 17:47:29,966 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:47:29,970 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:47:29,977 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partition_ground-1.i[860,873] [2022-01-31 17:47:29,982 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:47:29,995 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:47:29,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:29 WrapperNode [2022-01-31 17:47:29,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:47:29,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:47:29,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:47:29,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:47:30,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:29" (1/1) ... [2022-01-31 17:47:30,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:29" (1/1) ... [2022-01-31 17:47:30,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:29" (1/1) ... [2022-01-31 17:47:30,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:29" (1/1) ... [2022-01-31 17:47:30,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:29" (1/1) ... [2022-01-31 17:47:30,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:29" (1/1) ... [2022-01-31 17:47:30,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:29" (1/1) ... [2022-01-31 17:47:30,016 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:47:30,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:47:30,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:47:30,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:47:30,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:29" (1/1) ... [2022-01-31 17:47:30,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:47:30,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:47:30,072 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 17:47:30,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 17:47:30,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:47:30,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:47:30,101 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:47:30,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:47:30,101 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:47:30,101 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:47:30,102 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:47:30,102 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:47:30,102 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:47:30,102 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:47:30,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:47:30,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 17:47:30,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:47:30,102 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:47:30,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:47:30,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:47:30,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:47:30,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:47:30,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:47:30,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:47:30,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:47:30,151 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:47:30,152 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:47:30,340 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:47:30,344 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:47:30,344 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-31 17:47:30,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:47:30 BoogieIcfgContainer [2022-01-31 17:47:30,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:47:30,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:47:30,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:47:30,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:47:30,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:47:29" (1/3) ... [2022-01-31 17:47:30,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4867e85b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:47:30, skipping insertion in model container [2022-01-31 17:47:30,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:29" (2/3) ... [2022-01-31 17:47:30,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4867e85b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:47:30, skipping insertion in model container [2022-01-31 17:47:30,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:47:30" (3/3) ... [2022-01-31 17:47:30,367 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2022-01-31 17:47:30,370 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:47:30,370 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:47:30,409 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:47:30,422 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 17:47:30,423 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:47:30,431 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 17:47:30,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 17:47:30,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:30,439 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:30,439 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:30,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:30,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1568654690, now seen corresponding path program 1 times [2022-01-31 17:47:30,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:30,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717542036] [2022-01-31 17:47:30,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:30,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:30,486 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:30,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:30,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:30,577 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:30,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717542036] [2022-01-31 17:47:30,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [717542036] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:30,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:30,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:47:30,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967715457] [2022-01-31 17:47:30,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:30,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:47:30,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:30,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:47:30,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:47:30,601 INFO L87 Difference]: Start difference. First operand has 34 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:30,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:30,665 INFO L93 Difference]: Finished difference Result 59 states and 80 transitions. [2022-01-31 17:47:30,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:47:30,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 17:47:30,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:30,677 INFO L225 Difference]: With dead ends: 59 [2022-01-31 17:47:30,678 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 17:47:30,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:47:30,683 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 29 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:30,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:47:30,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 17:47:30,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-31 17:47:30,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:30,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-01-31 17:47:30,712 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 15 [2022-01-31 17:47:30,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:30,712 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-01-31 17:47:30,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:30,712 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-01-31 17:47:30,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 17:47:30,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:30,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:30,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:47:30,713 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:30,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:30,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1133475219, now seen corresponding path program 1 times [2022-01-31 17:47:30,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:30,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619039002] [2022-01-31 17:47:30,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:30,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:30,716 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:30,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:30,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:30,774 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:30,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619039002] [2022-01-31 17:47:30,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [619039002] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:30,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:30,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:47:30,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195445349] [2022-01-31 17:47:30,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:30,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:47:30,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:30,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:47:30,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:47:30,777 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:30,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:30,858 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2022-01-31 17:47:30,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:47:30,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 17:47:30,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:30,860 INFO L225 Difference]: With dead ends: 55 [2022-01-31 17:47:30,860 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 17:47:30,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:47:30,867 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 38 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:30,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 34 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:30,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 17:47:30,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2022-01-31 17:47:30,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:30,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-01-31 17:47:30,878 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 15 [2022-01-31 17:47:30,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:30,878 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-01-31 17:47:30,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:30,879 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-01-31 17:47:30,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 17:47:30,879 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:30,879 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:30,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:47:30,880 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:30,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:30,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1198767545, now seen corresponding path program 1 times [2022-01-31 17:47:30,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:30,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578159776] [2022-01-31 17:47:30,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:30,892 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:30,893 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:30,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:30,894 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:30,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:30,987 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:30,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578159776] [2022-01-31 17:47:30,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1578159776] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:30,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:30,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:47:30,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93346339] [2022-01-31 17:47:30,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:30,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:47:30,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:30,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:47:30,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:47:30,989 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:31,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:31,098 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2022-01-31 17:47:31,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:47:31,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 17:47:31,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:31,100 INFO L225 Difference]: With dead ends: 62 [2022-01-31 17:47:31,100 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 17:47:31,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:47:31,106 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 54 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:31,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 34 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:31,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 17:47:31,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2022-01-31 17:47:31,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-01-31 17:47:31,116 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 21 [2022-01-31 17:47:31,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:31,116 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-01-31 17:47:31,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:31,116 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-01-31 17:47:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 17:47:31,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:31,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:31,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:47:31,117 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:31,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1663793581, now seen corresponding path program 2 times [2022-01-31 17:47:31,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:31,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663608494] [2022-01-31 17:47:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:31,122 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:31,122 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:31,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:31,123 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:31,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:31,194 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:31,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663608494] [2022-01-31 17:47:31,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [663608494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:31,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:31,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:47:31,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105505748] [2022-01-31 17:47:31,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:31,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:47:31,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:31,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:47:31,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:47:31,197 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:31,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:31,294 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2022-01-31 17:47:31,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:47:31,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 17:47:31,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:31,295 INFO L225 Difference]: With dead ends: 71 [2022-01-31 17:47:31,295 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 17:47:31,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:47:31,298 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 70 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:31,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 34 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:31,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 17:47:31,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2022-01-31 17:47:31,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:31,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2022-01-31 17:47:31,317 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 27 [2022-01-31 17:47:31,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:31,317 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2022-01-31 17:47:31,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:31,317 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-01-31 17:47:31,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 17:47:31,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:31,318 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:31,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:47:31,318 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:31,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:31,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1652839943, now seen corresponding path program 3 times [2022-01-31 17:47:31,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:31,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797151873] [2022-01-31 17:47:31,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:31,322 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:31,323 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:31,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:31,324 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:31,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:31,426 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:31,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797151873] [2022-01-31 17:47:31,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [797151873] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:31,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:31,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:47:31,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713842458] [2022-01-31 17:47:31,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:31,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:47:31,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:31,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:47:31,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:47:31,428 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:31,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:31,538 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2022-01-31 17:47:31,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:47:31,539 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 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 33 [2022-01-31 17:47:31,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:31,541 INFO L225 Difference]: With dead ends: 80 [2022-01-31 17:47:31,541 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 17:47:31,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:47:31,552 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 82 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:31,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 39 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:31,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 17:47:31,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2022-01-31 17:47:31,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 42 states have internal predecessors, (54), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:31,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-01-31 17:47:31,558 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 33 [2022-01-31 17:47:31,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:31,558 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-01-31 17:47:31,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:31,558 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-01-31 17:47:31,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 17:47:31,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:31,559 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:31,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:47:31,559 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:31,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:31,559 INFO L85 PathProgramCache]: Analyzing trace with hash -79288557, now seen corresponding path program 4 times [2022-01-31 17:47:31,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:31,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497484055] [2022-01-31 17:47:31,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:31,562 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:31,562 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:31,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:31,563 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:31,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:31,630 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:31,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497484055] [2022-01-31 17:47:31,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [497484055] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:31,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:31,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:47:31,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310531718] [2022-01-31 17:47:31,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:31,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:47:31,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:31,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:47:31,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:47:31,631 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:31,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:31,753 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2022-01-31 17:47:31,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:47:31,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 17:47:31,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:31,756 INFO L225 Difference]: With dead ends: 89 [2022-01-31 17:47:31,756 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 17:47:31,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:47:31,758 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 106 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:31,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 39 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:31,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 17:47:31,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2022-01-31 17:47:31,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 states have internal predecessors, (62), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:31,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2022-01-31 17:47:31,768 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 39 [2022-01-31 17:47:31,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:31,807 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2022-01-31 17:47:31,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:31,807 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2022-01-31 17:47:31,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 17:47:31,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:31,814 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:31,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:47:31,814 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:31,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:31,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1969587769, now seen corresponding path program 5 times [2022-01-31 17:47:31,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:31,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819071712] [2022-01-31 17:47:31,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:31,823 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:31,824 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:31,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:31,825 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:31,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:31,968 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:31,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819071712] [2022-01-31 17:47:31,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1819071712] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:31,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:31,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:47:31,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721402678] [2022-01-31 17:47:31,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:31,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:47:31,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:31,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:47:31,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:47:31,971 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:32,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:32,125 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2022-01-31 17:47:32,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:47:32,126 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 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 45 [2022-01-31 17:47:32,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:32,127 INFO L225 Difference]: With dead ends: 98 [2022-01-31 17:47:32,127 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 17:47:32,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:47:32,128 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 126 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:32,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 39 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:32,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 17:47:32,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2022-01-31 17:47:32,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 54 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2022-01-31 17:47:32,142 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 45 [2022-01-31 17:47:32,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:32,142 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2022-01-31 17:47:32,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:32,142 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2022-01-31 17:47:32,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 17:47:32,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:32,143 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:32,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:47:32,143 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:32,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:32,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1040734163, now seen corresponding path program 6 times [2022-01-31 17:47:32,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:32,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952672057] [2022-01-31 17:47:32,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:32,150 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:32,150 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:32,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:32,151 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:32,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:32,272 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 17:47:32,273 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:32,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952672057] [2022-01-31 17:47:32,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [952672057] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:32,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:32,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:47:32,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116108917] [2022-01-31 17:47:32,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:32,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:47:32,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:32,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:47:32,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:47:32,275 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:32,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:32,423 INFO L93 Difference]: Finished difference Result 107 states and 138 transitions. [2022-01-31 17:47:32,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:47:32,423 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 17:47:32,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:32,424 INFO L225 Difference]: With dead ends: 107 [2022-01-31 17:47:32,424 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 17:47:32,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:47:32,427 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 122 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:32,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 49 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:32,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 17:47:32,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2022-01-31 17:47:32,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.3) internal successors, (78), 60 states have internal predecessors, (78), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:32,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2022-01-31 17:47:32,439 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 51 [2022-01-31 17:47:32,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:32,440 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2022-01-31 17:47:32,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:32,440 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2022-01-31 17:47:32,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 17:47:32,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:32,441 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:32,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:47:32,441 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:32,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:32,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1932701063, now seen corresponding path program 7 times [2022-01-31 17:47:32,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:32,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60487110] [2022-01-31 17:47:32,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:32,445 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:32,445 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:32,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:32,446 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:32,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:32,551 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:32,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60487110] [2022-01-31 17:47:32,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [60487110] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:32,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:32,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:47:32,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291079530] [2022-01-31 17:47:32,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:32,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:47:32,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:32,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:47:32,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:47:32,553 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:32,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:32,733 INFO L93 Difference]: Finished difference Result 116 states and 150 transitions. [2022-01-31 17:47:32,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:47:32,733 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-01-31 17:47:32,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:32,735 INFO L225 Difference]: With dead ends: 116 [2022-01-31 17:47:32,735 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 17:47:32,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:47:32,735 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 182 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:32,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 39 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:32,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 17:47:32,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2022-01-31 17:47:32,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 66 states have (on average 1.303030303030303) internal successors, (86), 66 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:32,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2022-01-31 17:47:32,747 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 57 [2022-01-31 17:47:32,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:32,747 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2022-01-31 17:47:32,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:32,747 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2022-01-31 17:47:32,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 17:47:32,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:32,750 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:32,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:47:32,750 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:32,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:32,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1589700461, now seen corresponding path program 8 times [2022-01-31 17:47:32,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:32,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241376981] [2022-01-31 17:47:32,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:32,754 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:32,754 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:32,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:32,756 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:32,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:32,854 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:32,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241376981] [2022-01-31 17:47:32,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [241376981] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:32,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:32,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:47:32,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240595398] [2022-01-31 17:47:32,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:32,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:47:32,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:32,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:47:32,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:47:32,856 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:33,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:33,018 INFO L93 Difference]: Finished difference Result 125 states and 162 transitions. [2022-01-31 17:47:33,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:47:33,018 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 17:47:33,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:33,019 INFO L225 Difference]: With dead ends: 125 [2022-01-31 17:47:33,019 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 17:47:33,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:47:33,020 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 154 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:33,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 54 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:33,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 17:47:33,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2022-01-31 17:47:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 72 states have (on average 1.3055555555555556) internal successors, (94), 72 states have internal predecessors, (94), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2022-01-31 17:47:33,030 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 63 [2022-01-31 17:47:33,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:33,030 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2022-01-31 17:47:33,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2022-01-31 17:47:33,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 17:47:33,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:33,032 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:33,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:47:33,033 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:33,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:33,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1146031801, now seen corresponding path program 9 times [2022-01-31 17:47:33,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:33,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134384876] [2022-01-31 17:47:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:33,036 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:33,036 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:33,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:33,037 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:33,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:33,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:33,172 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:33,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134384876] [2022-01-31 17:47:33,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [134384876] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:33,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:33,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:47:33,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473198588] [2022-01-31 17:47:33,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:33,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:47:33,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:33,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:47:33,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:47:33,174 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:33,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:33,382 INFO L93 Difference]: Finished difference Result 134 states and 174 transitions. [2022-01-31 17:47:33,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:47:33,382 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 69 [2022-01-31 17:47:33,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:33,383 INFO L225 Difference]: With dead ends: 134 [2022-01-31 17:47:33,383 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 17:47:33,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:47:33,384 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 182 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:33,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 49 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:33,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 17:47:33,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2022-01-31 17:47:33,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 78 states have (on average 1.3076923076923077) internal successors, (102), 78 states have internal predecessors, (102), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:33,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2022-01-31 17:47:33,392 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 69 [2022-01-31 17:47:33,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:33,392 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2022-01-31 17:47:33,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:33,392 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2022-01-31 17:47:33,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 17:47:33,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:33,393 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:33,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:47:33,393 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:33,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:33,393 INFO L85 PathProgramCache]: Analyzing trace with hash -32609965, now seen corresponding path program 10 times [2022-01-31 17:47:33,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:33,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881272884] [2022-01-31 17:47:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:33,395 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:33,395 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:33,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:33,397 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:33,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:33,493 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:33,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881272884] [2022-01-31 17:47:33,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [881272884] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:33,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:33,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:47:33,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284686304] [2022-01-31 17:47:33,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:33,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:47:33,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:33,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:47:33,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:47:33,494 INFO L87 Difference]: Start difference. First operand 85 states and 109 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:33,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:33,708 INFO L93 Difference]: Finished difference Result 143 states and 186 transitions. [2022-01-31 17:47:33,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:47:33,708 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 17:47:33,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:33,709 INFO L225 Difference]: With dead ends: 143 [2022-01-31 17:47:33,709 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 17:47:33,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:47:33,710 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 230 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:33,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 39 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:33,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 17:47:33,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2022-01-31 17:47:33,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 84 states have internal predecessors, (110), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:33,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2022-01-31 17:47:33,718 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 75 [2022-01-31 17:47:33,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:33,718 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2022-01-31 17:47:33,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:33,719 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2022-01-31 17:47:33,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 17:47:33,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:33,719 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:33,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:47:33,719 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:33,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:33,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1602665209, now seen corresponding path program 11 times [2022-01-31 17:47:33,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:33,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052525535] [2022-01-31 17:47:33,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:33,722 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:33,722 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:33,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:33,724 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:33,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:33,845 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:33,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052525535] [2022-01-31 17:47:33,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1052525535] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:33,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:33,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:47:33,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816548969] [2022-01-31 17:47:33,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:33,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:47:33,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:33,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:47:33,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:47:33,846 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:34,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:34,073 INFO L93 Difference]: Finished difference Result 152 states and 198 transitions. [2022-01-31 17:47:34,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:47:34,074 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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 81 [2022-01-31 17:47:34,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:34,074 INFO L225 Difference]: With dead ends: 152 [2022-01-31 17:47:34,074 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 17:47:34,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:47:34,075 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 238 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:34,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 39 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:34,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 17:47:34,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2022-01-31 17:47:34,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 90 states have (on average 1.3111111111111111) internal successors, (118), 90 states have internal predecessors, (118), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:34,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2022-01-31 17:47:34,083 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 81 [2022-01-31 17:47:34,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:34,083 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2022-01-31 17:47:34,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:34,083 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2022-01-31 17:47:34,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 17:47:34,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:34,084 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:34,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:47:34,084 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:34,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:34,084 INFO L85 PathProgramCache]: Analyzing trace with hash 177883667, now seen corresponding path program 12 times [2022-01-31 17:47:34,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:34,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498066920] [2022-01-31 17:47:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:34,087 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:34,087 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:34,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:34,088 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:34,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:34,228 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:34,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498066920] [2022-01-31 17:47:34,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1498066920] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:34,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:34,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:47:34,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115993636] [2022-01-31 17:47:34,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:34,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:47:34,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:34,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:47:34,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:47:34,229 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:34,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:34,464 INFO L93 Difference]: Finished difference Result 161 states and 210 transitions. [2022-01-31 17:47:34,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:47:34,465 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-01-31 17:47:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:34,465 INFO L225 Difference]: With dead ends: 161 [2022-01-31 17:47:34,465 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 17:47:34,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:47:34,466 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 274 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:34,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 39 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:34,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 17:47:34,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2022-01-31 17:47:34,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 96 states have (on average 1.3125) internal successors, (126), 96 states have internal predecessors, (126), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:34,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 133 transitions. [2022-01-31 17:47:34,474 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 133 transitions. Word has length 87 [2022-01-31 17:47:34,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:34,474 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 133 transitions. [2022-01-31 17:47:34,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:34,474 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 133 transitions. [2022-01-31 17:47:34,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 17:47:34,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:34,475 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:34,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:47:34,475 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:34,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:34,475 INFO L85 PathProgramCache]: Analyzing trace with hash -988784839, now seen corresponding path program 13 times [2022-01-31 17:47:34,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:34,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260214033] [2022-01-31 17:47:34,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:34,477 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:34,477 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:34,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:34,478 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:34,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:34,653 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:34,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260214033] [2022-01-31 17:47:34,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [260214033] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:34,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:34,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:47:34,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539888250] [2022-01-31 17:47:34,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:34,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:47:34,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:34,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:47:34,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:47:34,654 INFO L87 Difference]: Start difference. First operand 103 states and 133 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:34,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:34,936 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2022-01-31 17:47:34,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:47:34,936 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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 93 [2022-01-31 17:47:34,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:34,936 INFO L225 Difference]: With dead ends: 170 [2022-01-31 17:47:34,937 INFO L226 Difference]: Without dead ends: 113 [2022-01-31 17:47:34,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:47:34,937 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 270 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:34,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 49 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:34,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-31 17:47:34,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2022-01-31 17:47:34,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 102 states have (on average 1.3137254901960784) internal successors, (134), 102 states have internal predecessors, (134), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:34,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 141 transitions. [2022-01-31 17:47:34,948 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 141 transitions. Word has length 93 [2022-01-31 17:47:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:34,949 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 141 transitions. [2022-01-31 17:47:34,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:34,949 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 141 transitions. [2022-01-31 17:47:34,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 17:47:34,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:34,949 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:34,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:47:34,950 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:34,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:34,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1710834989, now seen corresponding path program 14 times [2022-01-31 17:47:34,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:34,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811295025] [2022-01-31 17:47:34,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:34,955 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:34,955 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:34,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:34,956 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:35,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:35,132 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:35,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811295025] [2022-01-31 17:47:35,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [811295025] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:35,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:35,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:47:35,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903707111] [2022-01-31 17:47:35,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:35,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:47:35,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:35,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:47:35,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:47:35,134 INFO L87 Difference]: Start difference. First operand 109 states and 141 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:35,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:35,452 INFO L93 Difference]: Finished difference Result 179 states and 234 transitions. [2022-01-31 17:47:35,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:47:35,453 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-01-31 17:47:35,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:35,453 INFO L225 Difference]: With dead ends: 179 [2022-01-31 17:47:35,453 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 17:47:35,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:47:35,454 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 278 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:35,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 49 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:35,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 17:47:35,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2022-01-31 17:47:35,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 108 states have (on average 1.3148148148148149) internal successors, (142), 108 states have internal predecessors, (142), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:35,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 149 transitions. [2022-01-31 17:47:35,465 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 149 transitions. Word has length 99 [2022-01-31 17:47:35,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:35,465 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 149 transitions. [2022-01-31 17:47:35,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:35,465 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 149 transitions. [2022-01-31 17:47:35,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 17:47:35,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:35,465 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:35,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:47:35,466 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:35,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:35,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1049092985, now seen corresponding path program 15 times [2022-01-31 17:47:35,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:35,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331272601] [2022-01-31 17:47:35,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:35,468 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:35,468 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:35,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:35,469 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:35,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:35,636 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:35,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331272601] [2022-01-31 17:47:35,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1331272601] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:35,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:35,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:47:35,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671972430] [2022-01-31 17:47:35,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:35,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:47:35,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:35,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:47:35,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:47:35,637 INFO L87 Difference]: Start difference. First operand 115 states and 149 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:35,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:35,945 INFO L93 Difference]: Finished difference Result 188 states and 246 transitions. [2022-01-31 17:47:35,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:47:35,945 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-01-31 17:47:35,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:35,946 INFO L225 Difference]: With dead ends: 188 [2022-01-31 17:47:35,946 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 17:47:35,947 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 17:47:35,947 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 346 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:35,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 39 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:35,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 17:47:35,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2022-01-31 17:47:35,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 114 states have (on average 1.3157894736842106) internal successors, (150), 114 states have internal predecessors, (150), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 157 transitions. [2022-01-31 17:47:35,958 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 157 transitions. Word has length 105 [2022-01-31 17:47:35,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:35,958 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 157 transitions. [2022-01-31 17:47:35,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:35,958 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 157 transitions. [2022-01-31 17:47:35,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 17:47:35,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:35,958 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:35,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:47:35,959 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:35,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:35,959 INFO L85 PathProgramCache]: Analyzing trace with hash -596132973, now seen corresponding path program 16 times [2022-01-31 17:47:35,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:35,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349166076] [2022-01-31 17:47:35,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:35,961 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:35,961 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:35,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:35,962 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:36,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:36,148 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:36,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349166076] [2022-01-31 17:47:36,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [349166076] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:36,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:36,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:47:36,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115387646] [2022-01-31 17:47:36,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:36,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:47:36,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:36,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:47:36,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:47:36,150 INFO L87 Difference]: Start difference. First operand 121 states and 157 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:36,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:36,507 INFO L93 Difference]: Finished difference Result 197 states and 258 transitions. [2022-01-31 17:47:36,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:47:36,507 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-01-31 17:47:36,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:36,508 INFO L225 Difference]: With dead ends: 197 [2022-01-31 17:47:36,508 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 17:47:36,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:47:36,509 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 306 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:36,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 49 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:36,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 17:47:36,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2022-01-31 17:47:36,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 120 states have (on average 1.3166666666666667) internal successors, (158), 120 states have internal predecessors, (158), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:36,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 165 transitions. [2022-01-31 17:47:36,524 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 165 transitions. Word has length 111 [2022-01-31 17:47:36,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:36,524 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 165 transitions. [2022-01-31 17:47:36,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 165 transitions. [2022-01-31 17:47:36,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 17:47:36,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:36,525 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:36,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:47:36,526 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:36,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:36,526 INFO L85 PathProgramCache]: Analyzing trace with hash 948527033, now seen corresponding path program 17 times [2022-01-31 17:47:36,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:36,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424777652] [2022-01-31 17:47:36,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:36,528 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:36,528 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:36,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:36,530 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:36,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:36,713 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:36,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424777652] [2022-01-31 17:47:36,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [424777652] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:36,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:36,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:47:36,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852975977] [2022-01-31 17:47:36,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:36,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:47:36,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:36,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:47:36,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:47:36,714 INFO L87 Difference]: Start difference. First operand 127 states and 165 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:37,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:37,078 INFO L93 Difference]: Finished difference Result 206 states and 270 transitions. [2022-01-31 17:47:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:47:37,078 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 117 [2022-01-31 17:47:37,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:37,079 INFO L225 Difference]: With dead ends: 206 [2022-01-31 17:47:37,079 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 17:47:37,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:47:37,080 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 354 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:37,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 44 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:37,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 17:47:37,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2022-01-31 17:47:37,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 126 states have (on average 1.3174603174603174) internal successors, (166), 126 states have internal predecessors, (166), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:37,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2022-01-31 17:47:37,093 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 117 [2022-01-31 17:47:37,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:37,093 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2022-01-31 17:47:37,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:37,093 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2022-01-31 17:47:37,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 17:47:37,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:37,094 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:37,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:47:37,094 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:37,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:37,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1626256301, now seen corresponding path program 18 times [2022-01-31 17:47:37,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:37,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76432621] [2022-01-31 17:47:37,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:37,098 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:37,098 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:37,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:37,100 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:37,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:37,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:37,327 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:37,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76432621] [2022-01-31 17:47:37,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [76432621] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:37,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:37,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:47:37,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121802479] [2022-01-31 17:47:37,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:37,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:47:37,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:37,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:47:37,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:47:37,328 INFO L87 Difference]: Start difference. First operand 133 states and 173 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:37,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:37,714 INFO L93 Difference]: Finished difference Result 215 states and 282 transitions. [2022-01-31 17:47:37,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:47:37,714 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-01-31 17:47:37,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:37,715 INFO L225 Difference]: With dead ends: 215 [2022-01-31 17:47:37,715 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 17:47:37,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:47:37,717 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 358 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:37,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 44 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:37,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 17:47:37,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2022-01-31 17:47:37,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 132 states have (on average 1.3181818181818181) internal successors, (174), 132 states have internal predecessors, (174), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 181 transitions. [2022-01-31 17:47:37,732 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 181 transitions. Word has length 123 [2022-01-31 17:47:37,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:37,732 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 181 transitions. [2022-01-31 17:47:37,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:37,732 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 181 transitions. [2022-01-31 17:47:37,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 17:47:37,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:37,733 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:37,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:47:37,733 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:37,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:37,733 INFO L85 PathProgramCache]: Analyzing trace with hash -2102342663, now seen corresponding path program 19 times [2022-01-31 17:47:37,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:37,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034207521] [2022-01-31 17:47:37,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:37,735 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:37,735 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:37,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:37,737 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:37,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:37,963 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:37,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034207521] [2022-01-31 17:47:37,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2034207521] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:37,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:37,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:47:37,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098463627] [2022-01-31 17:47:37,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:37,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:47:37,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:37,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:47:37,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:47:37,964 INFO L87 Difference]: Start difference. First operand 139 states and 181 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:38,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:38,394 INFO L93 Difference]: Finished difference Result 224 states and 294 transitions. [2022-01-31 17:47:38,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:47:38,394 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 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 129 [2022-01-31 17:47:38,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:38,395 INFO L225 Difference]: With dead ends: 224 [2022-01-31 17:47:38,395 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 17:47:38,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:47:38,396 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 358 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:38,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 59 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:38,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 17:47:38,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2022-01-31 17:47:38,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 138 states have (on average 1.318840579710145) internal successors, (182), 138 states have internal predecessors, (182), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:38,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 189 transitions. [2022-01-31 17:47:38,409 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 189 transitions. Word has length 129 [2022-01-31 17:47:38,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:38,409 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 189 transitions. [2022-01-31 17:47:38,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:38,409 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 189 transitions. [2022-01-31 17:47:38,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 17:47:38,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:38,410 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:38,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:47:38,410 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:38,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:38,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1946718957, now seen corresponding path program 20 times [2022-01-31 17:47:38,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:38,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532505144] [2022-01-31 17:47:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:38,413 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:38,413 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:38,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:38,414 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:38,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:38,649 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:38,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532505144] [2022-01-31 17:47:38,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1532505144] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:38,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:38,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:47:38,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513445257] [2022-01-31 17:47:38,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:38,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:47:38,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:38,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:47:38,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:47:38,651 INFO L87 Difference]: Start difference. First operand 145 states and 189 transitions. Second operand has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 23 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:39,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:39,122 INFO L93 Difference]: Finished difference Result 233 states and 306 transitions. [2022-01-31 17:47:39,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:47:39,123 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 23 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-01-31 17:47:39,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:39,123 INFO L225 Difference]: With dead ends: 233 [2022-01-31 17:47:39,123 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 17:47:39,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:47:39,124 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 426 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:39,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 54 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:39,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 17:47:39,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2022-01-31 17:47:39,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 144 states have (on average 1.3194444444444444) internal successors, (190), 144 states have internal predecessors, (190), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 197 transitions. [2022-01-31 17:47:39,138 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 197 transitions. Word has length 135 [2022-01-31 17:47:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:39,139 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 197 transitions. [2022-01-31 17:47:39,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 23 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:39,139 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 197 transitions. [2022-01-31 17:47:39,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 17:47:39,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:39,140 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:39,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:47:39,140 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:39,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:39,140 INFO L85 PathProgramCache]: Analyzing trace with hash 261761081, now seen corresponding path program 21 times [2022-01-31 17:47:39,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:39,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046706143] [2022-01-31 17:47:39,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:39,142 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:39,142 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:39,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:39,144 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:39,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:39,402 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:39,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046706143] [2022-01-31 17:47:39,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1046706143] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:39,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:39,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:47:39,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79283575] [2022-01-31 17:47:39,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:39,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:47:39,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:39,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:47:39,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:47:39,403 INFO L87 Difference]: Start difference. First operand 151 states and 197 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 24 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:39,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:39,915 INFO L93 Difference]: Finished difference Result 242 states and 318 transitions. [2022-01-31 17:47:39,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:47:39,915 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 24 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 141 [2022-01-31 17:47:39,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:39,916 INFO L225 Difference]: With dead ends: 242 [2022-01-31 17:47:39,917 INFO L226 Difference]: Without dead ends: 161 [2022-01-31 17:47:39,917 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 17:47:39,920 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 418 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:39,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 54 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:39,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-31 17:47:39,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2022-01-31 17:47:39,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 150 states have (on average 1.32) internal successors, (198), 150 states have internal predecessors, (198), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:39,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 205 transitions. [2022-01-31 17:47:39,935 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 205 transitions. Word has length 141 [2022-01-31 17:47:39,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:39,936 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 205 transitions. [2022-01-31 17:47:39,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 24 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:39,936 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 205 transitions. [2022-01-31 17:47:39,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 17:47:39,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:39,937 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:39,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:47:39,937 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:39,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:39,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1783504339, now seen corresponding path program 22 times [2022-01-31 17:47:39,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:39,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609267858] [2022-01-31 17:47:39,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:39,940 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:39,941 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:39,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:39,942 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:40,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:40,229 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:40,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609267858] [2022-01-31 17:47:40,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [609267858] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:40,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:40,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:47:40,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581957584] [2022-01-31 17:47:40,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:40,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:47:40,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:40,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:47:40,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:47:40,230 INFO L87 Difference]: Start difference. First operand 157 states and 205 transitions. Second operand has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:40,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:40,710 INFO L93 Difference]: Finished difference Result 251 states and 330 transitions. [2022-01-31 17:47:40,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:47:40,710 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-01-31 17:47:40,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:40,711 INFO L225 Difference]: With dead ends: 251 [2022-01-31 17:47:40,711 INFO L226 Difference]: Without dead ends: 167 [2022-01-31 17:47:40,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:47:40,712 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 494 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:40,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 54 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:40,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-31 17:47:40,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2022-01-31 17:47:40,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 156 states have (on average 1.3205128205128205) internal successors, (206), 156 states have internal predecessors, (206), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:40,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 213 transitions. [2022-01-31 17:47:40,729 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 213 transitions. Word has length 147 [2022-01-31 17:47:40,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:40,729 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 213 transitions. [2022-01-31 17:47:40,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:40,729 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 213 transitions. [2022-01-31 17:47:40,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-31 17:47:40,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:40,730 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:40,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:47:40,730 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:40,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:40,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1260292999, now seen corresponding path program 23 times [2022-01-31 17:47:40,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:40,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187573971] [2022-01-31 17:47:40,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:40,732 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:40,732 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:40,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:40,734 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:41,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:41,044 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:41,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187573971] [2022-01-31 17:47:41,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [187573971] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:41,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:41,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:47:41,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274956460] [2022-01-31 17:47:41,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:41,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:47:41,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:41,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:47:41,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:47:41,045 INFO L87 Difference]: Start difference. First operand 163 states and 213 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:41,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:41,569 INFO L93 Difference]: Finished difference Result 260 states and 342 transitions. [2022-01-31 17:47:41,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:47:41,569 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 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 153 [2022-01-31 17:47:41,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:41,570 INFO L225 Difference]: With dead ends: 260 [2022-01-31 17:47:41,570 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 17:47:41,571 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 17:47:41,572 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 450 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:41,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 54 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:41,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 17:47:41,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2022-01-31 17:47:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 162 states have (on average 1.3209876543209877) internal successors, (214), 162 states have internal predecessors, (214), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:41,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 221 transitions. [2022-01-31 17:47:41,593 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 221 transitions. Word has length 153 [2022-01-31 17:47:41,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:41,593 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 221 transitions. [2022-01-31 17:47:41,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:41,593 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 221 transitions. [2022-01-31 17:47:41,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 17:47:41,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:41,594 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:41,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:47:41,595 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:41,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:41,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1580818067, now seen corresponding path program 24 times [2022-01-31 17:47:41,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:41,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933422945] [2022-01-31 17:47:41,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:41,597 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:41,597 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:41,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:41,599 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:41,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:41,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:41,883 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:41,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933422945] [2022-01-31 17:47:41,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [933422945] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:41,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:41,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:47:41,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347933785] [2022-01-31 17:47:41,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:41,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:47:41,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:41,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:47:41,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:47:41,884 INFO L87 Difference]: Start difference. First operand 169 states and 221 transitions. Second operand has 28 states, 28 states have (on average 3.0714285714285716) internal successors, (86), 27 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:42,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:42,464 INFO L93 Difference]: Finished difference Result 269 states and 354 transitions. [2022-01-31 17:47:42,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:47:42,465 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0714285714285716) internal successors, (86), 27 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-01-31 17:47:42,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:42,466 INFO L225 Difference]: With dead ends: 269 [2022-01-31 17:47:42,466 INFO L226 Difference]: Without dead ends: 179 [2022-01-31 17:47:42,466 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 17:47:42,467 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 474 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:42,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 54 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:42,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-31 17:47:42,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2022-01-31 17:47:42,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 168 states have (on average 1.3214285714285714) internal successors, (222), 168 states have internal predecessors, (222), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:42,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 229 transitions. [2022-01-31 17:47:42,487 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 229 transitions. Word has length 159 [2022-01-31 17:47:42,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:42,487 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 229 transitions. [2022-01-31 17:47:42,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.0714285714285716) internal successors, (86), 27 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:42,487 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 229 transitions. [2022-01-31 17:47:42,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 17:47:42,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:42,488 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:42,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:47:42,488 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:42,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:42,489 INFO L85 PathProgramCache]: Analyzing trace with hash -350048071, now seen corresponding path program 25 times [2022-01-31 17:47:42,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:42,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009835610] [2022-01-31 17:47:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:42,491 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:42,491 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:42,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:42,494 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:42,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:42,801 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:42,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009835610] [2022-01-31 17:47:42,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2009835610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:42,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:42,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:47:42,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972361457] [2022-01-31 17:47:42,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:42,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:47:42,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:42,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:47:42,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:47:42,802 INFO L87 Difference]: Start difference. First operand 175 states and 229 transitions. Second operand has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 28 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:43,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:43,344 INFO L93 Difference]: Finished difference Result 278 states and 366 transitions. [2022-01-31 17:47:43,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:47:43,345 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 28 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 165 [2022-01-31 17:47:43,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:43,346 INFO L225 Difference]: With dead ends: 278 [2022-01-31 17:47:43,346 INFO L226 Difference]: Without dead ends: 185 [2022-01-31 17:47:43,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:47:43,347 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 502 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:43,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 44 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:43,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-01-31 17:47:43,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 181. [2022-01-31 17:47:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 174 states have (on average 1.3218390804597702) internal successors, (230), 174 states have internal predecessors, (230), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 237 transitions. [2022-01-31 17:47:43,367 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 237 transitions. Word has length 165 [2022-01-31 17:47:43,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:43,367 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 237 transitions. [2022-01-31 17:47:43,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 28 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:43,368 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 237 transitions. [2022-01-31 17:47:43,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 17:47:43,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:43,368 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:43,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:47:43,369 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:43,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:43,369 INFO L85 PathProgramCache]: Analyzing trace with hash 685584211, now seen corresponding path program 26 times [2022-01-31 17:47:43,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:43,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781122866] [2022-01-31 17:47:43,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:43,371 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:43,371 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:43,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:43,374 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:43,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:43,722 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:43,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781122866] [2022-01-31 17:47:43,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1781122866] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:43,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:43,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:47:43,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490978197] [2022-01-31 17:47:43,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:43,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:47:43,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:43,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:47:43,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:47:43,723 INFO L87 Difference]: Start difference. First operand 181 states and 237 transitions. Second operand has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:44,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:44,334 INFO L93 Difference]: Finished difference Result 287 states and 378 transitions. [2022-01-31 17:47:44,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:47:44,335 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-01-31 17:47:44,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:44,335 INFO L225 Difference]: With dead ends: 287 [2022-01-31 17:47:44,336 INFO L226 Difference]: Without dead ends: 191 [2022-01-31 17:47:44,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:47:44,337 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 538 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:44,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 44 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:44,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-31 17:47:44,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2022-01-31 17:47:44,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 180 states have (on average 1.3222222222222222) internal successors, (238), 180 states have internal predecessors, (238), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:44,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 245 transitions. [2022-01-31 17:47:44,357 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 245 transitions. Word has length 171 [2022-01-31 17:47:44,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:44,357 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 245 transitions. [2022-01-31 17:47:44,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:44,357 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 245 transitions. [2022-01-31 17:47:44,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-31 17:47:44,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:44,358 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:44,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:47:44,359 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:44,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:44,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1913004807, now seen corresponding path program 27 times [2022-01-31 17:47:44,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:44,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119312900] [2022-01-31 17:47:44,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:44,361 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:44,361 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:44,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:44,363 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:44,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:44,698 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:44,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119312900] [2022-01-31 17:47:44,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1119312900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:44,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:44,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:47:44,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110778217] [2022-01-31 17:47:44,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:44,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:47:44,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:44,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:47:44,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:47:44,699 INFO L87 Difference]: Start difference. First operand 187 states and 245 transitions. Second operand has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 30 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:45,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:45,344 INFO L93 Difference]: Finished difference Result 296 states and 390 transitions. [2022-01-31 17:47:45,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:47:45,345 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 30 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 177 [2022-01-31 17:47:45,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:45,345 INFO L225 Difference]: With dead ends: 296 [2022-01-31 17:47:45,345 INFO L226 Difference]: Without dead ends: 197 [2022-01-31 17:47:45,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:47:45,347 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 538 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:45,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 54 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:45,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-31 17:47:45,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 193. [2022-01-31 17:47:45,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 186 states have (on average 1.3225806451612903) internal successors, (246), 186 states have internal predecessors, (246), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:45,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 253 transitions. [2022-01-31 17:47:45,368 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 253 transitions. Word has length 177 [2022-01-31 17:47:45,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:45,368 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 253 transitions. [2022-01-31 17:47:45,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 30 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:45,368 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 253 transitions. [2022-01-31 17:47:45,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 17:47:45,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:45,369 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:45,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:47:45,369 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:45,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:45,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1750962195, now seen corresponding path program 28 times [2022-01-31 17:47:45,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:45,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682903806] [2022-01-31 17:47:45,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:45,371 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:45,371 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:45,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:45,373 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:45,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:45,742 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:45,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682903806] [2022-01-31 17:47:45,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [682903806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:45,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:45,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:47:45,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763301254] [2022-01-31 17:47:45,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:45,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:47:45,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:45,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:47:45,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:47:45,744 INFO L87 Difference]: Start difference. First operand 193 states and 253 transitions. Second operand has 32 states, 32 states have (on average 3.0625) internal successors, (98), 31 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:46,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:46,430 INFO L93 Difference]: Finished difference Result 305 states and 402 transitions. [2022-01-31 17:47:46,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:47:46,430 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.0625) internal successors, (98), 31 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-01-31 17:47:46,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:46,431 INFO L225 Difference]: With dead ends: 305 [2022-01-31 17:47:46,431 INFO L226 Difference]: Without dead ends: 203 [2022-01-31 17:47:46,432 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 17:47:46,432 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 602 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:46,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 49 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:46,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-31 17:47:46,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2022-01-31 17:47:46,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 192 states have (on average 1.3229166666666667) internal successors, (254), 192 states have internal predecessors, (254), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:46,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 261 transitions. [2022-01-31 17:47:46,484 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 261 transitions. Word has length 183 [2022-01-31 17:47:46,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:46,484 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 261 transitions. [2022-01-31 17:47:46,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.0625) internal successors, (98), 31 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:46,484 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 261 transitions. [2022-01-31 17:47:46,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-31 17:47:46,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:46,485 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:46,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:47:46,485 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:46,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:46,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1677526727, now seen corresponding path program 29 times [2022-01-31 17:47:46,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:46,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263948850] [2022-01-31 17:47:46,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:46,488 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:46,488 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:46,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:46,490 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:46,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:46,895 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:46,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263948850] [2022-01-31 17:47:46,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [263948850] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:46,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:46,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:47:46,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671057746] [2022-01-31 17:47:46,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:46,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:47:46,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:46,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:47:46,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:47:46,897 INFO L87 Difference]: Start difference. First operand 199 states and 261 transitions. Second operand has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 32 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:47,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:47,604 INFO L93 Difference]: Finished difference Result 314 states and 414 transitions. [2022-01-31 17:47:47,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:47:47,604 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 32 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 189 [2022-01-31 17:47:47,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:47,605 INFO L225 Difference]: With dead ends: 314 [2022-01-31 17:47:47,605 INFO L226 Difference]: Without dead ends: 209 [2022-01-31 17:47:47,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:47:47,607 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 654 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:47,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 49 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:47,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-31 17:47:47,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2022-01-31 17:47:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 198 states have (on average 1.3232323232323233) internal successors, (262), 198 states have internal predecessors, (262), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:47,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 269 transitions. [2022-01-31 17:47:47,631 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 269 transitions. Word has length 189 [2022-01-31 17:47:47,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:47,631 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 269 transitions. [2022-01-31 17:47:47,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 32 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:47,631 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 269 transitions. [2022-01-31 17:47:47,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 17:47:47,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:47,632 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:47,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:47:47,632 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:47,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:47,633 INFO L85 PathProgramCache]: Analyzing trace with hash -673283885, now seen corresponding path program 30 times [2022-01-31 17:47:47,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:47,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177238015] [2022-01-31 17:47:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:47,635 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:47,635 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:47,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:47,637 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:48,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:48,092 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:48,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177238015] [2022-01-31 17:47:48,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [177238015] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:48,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:48,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:47:48,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450669424] [2022-01-31 17:47:48,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:48,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:47:48,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:48,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:47:48,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:47:48,093 INFO L87 Difference]: Start difference. First operand 205 states and 269 transitions. Second operand has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:48,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:48,771 INFO L93 Difference]: Finished difference Result 323 states and 426 transitions. [2022-01-31 17:47:48,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:47:48,772 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-01-31 17:47:48,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:48,773 INFO L225 Difference]: With dead ends: 323 [2022-01-31 17:47:48,773 INFO L226 Difference]: Without dead ends: 215 [2022-01-31 17:47:48,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:47:48,774 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 706 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:48,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 39 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:48,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-31 17:47:48,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 211. [2022-01-31 17:47:48,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 204 states have (on average 1.3235294117647058) internal successors, (270), 204 states have internal predecessors, (270), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:48,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 277 transitions. [2022-01-31 17:47:48,801 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 277 transitions. Word has length 195 [2022-01-31 17:47:48,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:48,801 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 277 transitions. [2022-01-31 17:47:48,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:48,801 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 277 transitions. [2022-01-31 17:47:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 17:47:48,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:48,802 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:48,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:47:48,802 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:48,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:48,802 INFO L85 PathProgramCache]: Analyzing trace with hash -153483911, now seen corresponding path program 31 times [2022-01-31 17:47:48,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:48,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479151995] [2022-01-31 17:47:48,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:48,804 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:48,804 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:48,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:48,807 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:49,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:49,259 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:49,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479151995] [2022-01-31 17:47:49,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1479151995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:49,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:49,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:47:49,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482315291] [2022-01-31 17:47:49,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:49,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:47:49,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:49,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:47:49,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:47:49,260 INFO L87 Difference]: Start difference. First operand 211 states and 277 transitions. Second operand has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 34 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:50,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:50,036 INFO L93 Difference]: Finished difference Result 332 states and 438 transitions. [2022-01-31 17:47:50,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:47:50,036 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 34 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 201 [2022-01-31 17:47:50,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:50,037 INFO L225 Difference]: With dead ends: 332 [2022-01-31 17:47:50,037 INFO L226 Difference]: Without dead ends: 221 [2022-01-31 17:47:50,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:47:50,038 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 670 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:50,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 44 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:50,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-01-31 17:47:50,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 217. [2022-01-31 17:47:50,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 210 states have (on average 1.3238095238095238) internal successors, (278), 210 states have internal predecessors, (278), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:50,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 285 transitions. [2022-01-31 17:47:50,067 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 285 transitions. Word has length 201 [2022-01-31 17:47:50,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:50,067 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 285 transitions. [2022-01-31 17:47:50,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 34 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:50,067 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 285 transitions. [2022-01-31 17:47:50,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 17:47:50,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:50,068 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:50,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:47:50,068 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:50,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:50,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1887174253, now seen corresponding path program 32 times [2022-01-31 17:47:50,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:50,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632960061] [2022-01-31 17:47:50,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:50,071 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:50,071 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:50,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:50,073 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:50,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:50,514 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:50,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632960061] [2022-01-31 17:47:50,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [632960061] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:50,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:50,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:47:50,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969910224] [2022-01-31 17:47:50,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:50,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:47:50,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:50,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:47:50,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:47:50,516 INFO L87 Difference]: Start difference. First operand 217 states and 285 transitions. Second operand has 36 states, 36 states have (on average 3.0555555555555554) internal successors, (110), 35 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:51,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:51,352 INFO L93 Difference]: Finished difference Result 341 states and 450 transitions. [2022-01-31 17:47:51,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:47:51,352 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0555555555555554) internal successors, (110), 35 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-01-31 17:47:51,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:51,353 INFO L225 Difference]: With dead ends: 341 [2022-01-31 17:47:51,353 INFO L226 Difference]: Without dead ends: 227 [2022-01-31 17:47:51,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:47:51,354 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 630 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:51,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 64 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:51,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-31 17:47:51,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 223. [2022-01-31 17:47:51,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 216 states have (on average 1.3240740740740742) internal successors, (286), 216 states have internal predecessors, (286), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:51,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 293 transitions. [2022-01-31 17:47:51,391 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 293 transitions. Word has length 207 [2022-01-31 17:47:51,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:51,392 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 293 transitions. [2022-01-31 17:47:51,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0555555555555554) internal successors, (110), 35 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:51,392 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 293 transitions. [2022-01-31 17:47:51,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-31 17:47:51,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:51,396 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:51,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:47:51,396 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:51,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:51,396 INFO L85 PathProgramCache]: Analyzing trace with hash 588972473, now seen corresponding path program 33 times [2022-01-31 17:47:51,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:51,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581174678] [2022-01-31 17:47:51,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:51,399 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:51,399 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:51,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:51,402 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:51,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:51,911 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:51,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581174678] [2022-01-31 17:47:51,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1581174678] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:51,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:51,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:47:51,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343375031] [2022-01-31 17:47:51,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:51,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:47:51,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:51,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:47:51,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:47:51,913 INFO L87 Difference]: Start difference. First operand 223 states and 293 transitions. Second operand has 37 states, 37 states have (on average 3.054054054054054) internal successors, (113), 36 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:52,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:52,686 INFO L93 Difference]: Finished difference Result 350 states and 462 transitions. [2022-01-31 17:47:52,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:47:52,686 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.054054054054054) internal successors, (113), 36 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 213 [2022-01-31 17:47:52,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:52,687 INFO L225 Difference]: With dead ends: 350 [2022-01-31 17:47:52,687 INFO L226 Difference]: Without dead ends: 233 [2022-01-31 17:47:52,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:47:52,689 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 698 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:52,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 44 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:52,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-01-31 17:47:52,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2022-01-31 17:47:52,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 222 states have (on average 1.3243243243243243) internal successors, (294), 222 states have internal predecessors, (294), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:52,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 301 transitions. [2022-01-31 17:47:52,728 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 301 transitions. Word has length 213 [2022-01-31 17:47:52,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:52,728 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 301 transitions. [2022-01-31 17:47:52,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.054054054054054) internal successors, (113), 36 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:52,728 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 301 transitions. [2022-01-31 17:47:52,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 17:47:52,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:52,729 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:52,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:47:52,729 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:52,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:52,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1148326483, now seen corresponding path program 34 times [2022-01-31 17:47:52,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:52,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355343668] [2022-01-31 17:47:52,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:52,731 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:52,731 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:52,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:52,734 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:53,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:53,250 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:53,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355343668] [2022-01-31 17:47:53,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [355343668] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:53,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:53,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:47:53,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603730768] [2022-01-31 17:47:53,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:53,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:47:53,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:53,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:47:53,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:47:53,251 INFO L87 Difference]: Start difference. First operand 229 states and 301 transitions. Second operand has 38 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 37 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:54,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:54,093 INFO L93 Difference]: Finished difference Result 359 states and 474 transitions. [2022-01-31 17:47:54,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:47:54,093 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 37 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-01-31 17:47:54,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:54,094 INFO L225 Difference]: With dead ends: 359 [2022-01-31 17:47:54,094 INFO L226 Difference]: Without dead ends: 239 [2022-01-31 17:47:54,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:47:54,096 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 626 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:54,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 54 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:54,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-31 17:47:54,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2022-01-31 17:47:54,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 228 states have (on average 1.3245614035087718) internal successors, (302), 228 states have internal predecessors, (302), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:54,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 309 transitions. [2022-01-31 17:47:54,130 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 309 transitions. Word has length 219 [2022-01-31 17:47:54,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:54,130 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 309 transitions. [2022-01-31 17:47:54,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 37 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:54,130 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 309 transitions. [2022-01-31 17:47:54,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-31 17:47:54,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:54,131 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:54,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:47:54,131 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:54,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:54,132 INFO L85 PathProgramCache]: Analyzing trace with hash 140635641, now seen corresponding path program 35 times [2022-01-31 17:47:54,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:54,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092432396] [2022-01-31 17:47:54,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:54,134 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:54,134 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:54,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:54,136 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:54,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:54,668 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:54,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092432396] [2022-01-31 17:47:54,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2092432396] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:54,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:54,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:47:54,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263711050] [2022-01-31 17:47:54,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:54,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:47:54,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:54,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:47:54,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:47:54,670 INFO L87 Difference]: Start difference. First operand 235 states and 309 transitions. Second operand has 39 states, 39 states have (on average 3.051282051282051) internal successors, (119), 38 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:55,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:55,544 INFO L93 Difference]: Finished difference Result 368 states and 486 transitions. [2022-01-31 17:47:55,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:47:55,544 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.051282051282051) internal successors, (119), 38 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 225 [2022-01-31 17:47:55,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:55,545 INFO L225 Difference]: With dead ends: 368 [2022-01-31 17:47:55,545 INFO L226 Difference]: Without dead ends: 245 [2022-01-31 17:47:55,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:47:55,547 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 698 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:55,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 54 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:55,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-31 17:47:55,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 241. [2022-01-31 17:47:55,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 234 states have (on average 1.3247863247863247) internal successors, (310), 234 states have internal predecessors, (310), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:55,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 317 transitions. [2022-01-31 17:47:55,579 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 317 transitions. Word has length 225 [2022-01-31 17:47:55,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:55,580 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 317 transitions. [2022-01-31 17:47:55,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.051282051282051) internal successors, (119), 38 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:55,580 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 317 transitions. [2022-01-31 17:47:55,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 17:47:55,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:55,581 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:55,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:47:55,581 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:55,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:55,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1999850733, now seen corresponding path program 36 times [2022-01-31 17:47:55,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:55,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118353255] [2022-01-31 17:47:55,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:55,583 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:55,583 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:55,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:55,586 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:56,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:56,133 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:56,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118353255] [2022-01-31 17:47:56,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [118353255] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:56,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:56,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:47:56,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748199799] [2022-01-31 17:47:56,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:56,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:47:56,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:56,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:47:56,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:47:56,135 INFO L87 Difference]: Start difference. First operand 241 states and 317 transitions. Second operand has 40 states, 40 states have (on average 3.05) internal successors, (122), 39 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:57,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:57,044 INFO L93 Difference]: Finished difference Result 377 states and 498 transitions. [2022-01-31 17:47:57,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:47:57,045 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.05) internal successors, (122), 39 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 231 [2022-01-31 17:47:57,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:57,046 INFO L225 Difference]: With dead ends: 377 [2022-01-31 17:47:57,046 INFO L226 Difference]: Without dead ends: 251 [2022-01-31 17:47:57,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:47:57,047 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 862 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:57,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 54 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:57,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-01-31 17:47:57,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 247. [2022-01-31 17:47:57,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 240 states have (on average 1.325) internal successors, (318), 240 states have internal predecessors, (318), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:57,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 325 transitions. [2022-01-31 17:47:57,082 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 325 transitions. Word has length 231 [2022-01-31 17:47:57,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:57,082 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 325 transitions. [2022-01-31 17:47:57,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.05) internal successors, (122), 39 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:57,083 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 325 transitions. [2022-01-31 17:47:57,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-01-31 17:47:57,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:57,083 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:57,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:47:57,084 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:57,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:57,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1320498631, now seen corresponding path program 37 times [2022-01-31 17:47:57,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:57,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153948786] [2022-01-31 17:47:57,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:57,087 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:57,087 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:57,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:57,090 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:57,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:57,698 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:57,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153948786] [2022-01-31 17:47:57,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1153948786] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:57,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:57,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:47:57,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978028100] [2022-01-31 17:47:57,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:57,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:47:57,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:57,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:47:57,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:47:57,700 INFO L87 Difference]: Start difference. First operand 247 states and 325 transitions. Second operand has 41 states, 41 states have (on average 3.048780487804878) internal successors, (125), 40 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:58,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:58,709 INFO L93 Difference]: Finished difference Result 386 states and 510 transitions. [2022-01-31 17:47:58,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:47:58,709 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.048780487804878) internal successors, (125), 40 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 237 [2022-01-31 17:47:58,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:58,710 INFO L225 Difference]: With dead ends: 386 [2022-01-31 17:47:58,710 INFO L226 Difference]: Without dead ends: 257 [2022-01-31 17:47:58,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:47:58,712 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 826 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:58,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 49 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:58,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-01-31 17:47:58,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 253. [2022-01-31 17:47:58,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 246 states have (on average 1.3252032520325203) internal successors, (326), 246 states have internal predecessors, (326), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:58,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 333 transitions. [2022-01-31 17:47:58,748 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 333 transitions. Word has length 237 [2022-01-31 17:47:58,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:58,748 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 333 transitions. [2022-01-31 17:47:58,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.048780487804878) internal successors, (125), 40 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:58,748 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 333 transitions. [2022-01-31 17:47:58,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 17:47:58,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:58,749 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:58,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:47:58,749 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:58,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:58,749 INFO L85 PathProgramCache]: Analyzing trace with hash 196600787, now seen corresponding path program 38 times [2022-01-31 17:47:58,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:58,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178308677] [2022-01-31 17:47:58,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:58,752 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:58,752 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:58,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:58,755 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:59,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:59,355 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:59,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178308677] [2022-01-31 17:47:59,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1178308677] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:59,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:59,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:47:59,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710772212] [2022-01-31 17:47:59,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:59,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:47:59,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:59,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:47:59,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:47:59,356 INFO L87 Difference]: Start difference. First operand 253 states and 333 transitions. Second operand has 42 states, 42 states have (on average 3.0476190476190474) internal successors, (128), 41 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:00,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:00,374 INFO L93 Difference]: Finished difference Result 395 states and 522 transitions. [2022-01-31 17:48:00,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:48:00,374 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0476190476190474) internal successors, (128), 41 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2022-01-31 17:48:00,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:00,375 INFO L225 Difference]: With dead ends: 395 [2022-01-31 17:48:00,375 INFO L226 Difference]: Without dead ends: 263 [2022-01-31 17:48:00,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:48:00,377 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 742 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:00,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [744 Valid, 54 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:00,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-01-31 17:48:00,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 259. [2022-01-31 17:48:00,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 252 states have (on average 1.3253968253968254) internal successors, (334), 252 states have internal predecessors, (334), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:00,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 341 transitions. [2022-01-31 17:48:00,414 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 341 transitions. Word has length 243 [2022-01-31 17:48:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:00,414 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 341 transitions. [2022-01-31 17:48:00,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0476190476190474) internal successors, (128), 41 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 341 transitions. [2022-01-31 17:48:00,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-01-31 17:48:00,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:00,415 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:00,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:48:00,415 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:00,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:00,416 INFO L85 PathProgramCache]: Analyzing trace with hash 191993465, now seen corresponding path program 39 times [2022-01-31 17:48:00,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:00,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568631919] [2022-01-31 17:48:00,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:00,418 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:00,418 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:00,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:00,421 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:01,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:01,204 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:01,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568631919] [2022-01-31 17:48:01,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1568631919] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:01,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:01,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:48:01,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252223897] [2022-01-31 17:48:01,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:01,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:48:01,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:01,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:48:01,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:48:01,205 INFO L87 Difference]: Start difference. First operand 259 states and 341 transitions. Second operand has 43 states, 43 states have (on average 3.046511627906977) internal successors, (131), 42 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:02,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:02,318 INFO L93 Difference]: Finished difference Result 404 states and 534 transitions. [2022-01-31 17:48:02,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:48:02,318 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.046511627906977) internal successors, (131), 42 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 249 [2022-01-31 17:48:02,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:02,319 INFO L225 Difference]: With dead ends: 404 [2022-01-31 17:48:02,319 INFO L226 Difference]: Without dead ends: 269 [2022-01-31 17:48:02,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:48:02,321 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 870 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:02,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [872 Valid, 64 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:02,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-31 17:48:02,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 265. [2022-01-31 17:48:02,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 258 states have (on average 1.3255813953488371) internal successors, (342), 258 states have internal predecessors, (342), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:02,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 349 transitions. [2022-01-31 17:48:02,360 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 349 transitions. Word has length 249 [2022-01-31 17:48:02,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:02,361 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 349 transitions. [2022-01-31 17:48:02,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.046511627906977) internal successors, (131), 42 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:02,361 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 349 transitions. [2022-01-31 17:48:02,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-31 17:48:02,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:02,362 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:02,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:48:02,362 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:02,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:02,362 INFO L85 PathProgramCache]: Analyzing trace with hash -648567661, now seen corresponding path program 40 times [2022-01-31 17:48:02,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:02,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630547230] [2022-01-31 17:48:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:02,364 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:02,364 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:02,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:02,367 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:03,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:03,137 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 17:48:03,137 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:03,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630547230] [2022-01-31 17:48:03,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [630547230] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:03,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:03,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:48:03,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657388351] [2022-01-31 17:48:03,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:03,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:48:03,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:03,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:48:03,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:48:03,138 INFO L87 Difference]: Start difference. First operand 265 states and 349 transitions. Second operand has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 43 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:04,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:04,231 INFO L93 Difference]: Finished difference Result 413 states and 546 transitions. [2022-01-31 17:48:04,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:48:04,232 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 43 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2022-01-31 17:48:04,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:04,233 INFO L225 Difference]: With dead ends: 413 [2022-01-31 17:48:04,233 INFO L226 Difference]: Without dead ends: 275 [2022-01-31 17:48:04,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:48:04,234 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 910 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:04,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [912 Valid, 59 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:04,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-01-31 17:48:04,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 271. [2022-01-31 17:48:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 264 states have (on average 1.3257575757575757) internal successors, (350), 264 states have internal predecessors, (350), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:04,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 357 transitions. [2022-01-31 17:48:04,276 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 357 transitions. Word has length 255 [2022-01-31 17:48:04,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:04,276 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 357 transitions. [2022-01-31 17:48:04,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 43 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:04,276 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 357 transitions. [2022-01-31 17:48:04,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-01-31 17:48:04,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:04,277 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:04,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:48:04,277 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:04,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:04,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1485679943, now seen corresponding path program 41 times [2022-01-31 17:48:04,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:04,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872952638] [2022-01-31 17:48:04,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:04,280 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:04,280 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:04,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:04,284 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:04,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:04,970 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:04,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872952638] [2022-01-31 17:48:04,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1872952638] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:04,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:04,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:48:04,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673139356] [2022-01-31 17:48:04,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:04,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:48:04,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:04,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:48:04,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:48:04,972 INFO L87 Difference]: Start difference. First operand 271 states and 357 transitions. Second operand has 45 states, 45 states have (on average 3.0444444444444443) internal successors, (137), 44 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:06,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:06,077 INFO L93 Difference]: Finished difference Result 422 states and 558 transitions. [2022-01-31 17:48:06,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:48:06,077 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.0444444444444443) internal successors, (137), 44 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 261 [2022-01-31 17:48:06,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:06,078 INFO L225 Difference]: With dead ends: 422 [2022-01-31 17:48:06,078 INFO L226 Difference]: Without dead ends: 281 [2022-01-31 17:48:06,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:48:06,080 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 942 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:06,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [944 Valid, 44 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:06,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-01-31 17:48:06,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 277. [2022-01-31 17:48:06,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 270 states have (on average 1.325925925925926) internal successors, (358), 270 states have internal predecessors, (358), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:06,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 365 transitions. [2022-01-31 17:48:06,123 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 365 transitions. Word has length 261 [2022-01-31 17:48:06,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:06,123 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 365 transitions. [2022-01-31 17:48:06,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.0444444444444443) internal successors, (137), 44 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:06,124 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 365 transitions. [2022-01-31 17:48:06,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-31 17:48:06,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:06,124 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:06,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:48:06,125 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:06,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:06,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1697647277, now seen corresponding path program 42 times [2022-01-31 17:48:06,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:06,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701933429] [2022-01-31 17:48:06,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:06,127 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:06,127 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:06,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:06,131 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:06,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:06,809 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:06,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701933429] [2022-01-31 17:48:06,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1701933429] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:06,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:06,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:48:06,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089132897] [2022-01-31 17:48:06,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:06,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:48:06,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:06,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:48:06,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:48:06,810 INFO L87 Difference]: Start difference. First operand 277 states and 365 transitions. Second operand has 46 states, 46 states have (on average 3.0434782608695654) internal successors, (140), 45 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:07,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:07,948 INFO L93 Difference]: Finished difference Result 431 states and 570 transitions. [2022-01-31 17:48:07,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:48:07,949 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0434782608695654) internal successors, (140), 45 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2022-01-31 17:48:07,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:07,950 INFO L225 Difference]: With dead ends: 431 [2022-01-31 17:48:07,950 INFO L226 Difference]: Without dead ends: 287 [2022-01-31 17:48:07,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:48:07,951 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 914 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:07,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [916 Valid, 49 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:07,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-01-31 17:48:08,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 283. [2022-01-31 17:48:08,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 276 states have (on average 1.326086956521739) internal successors, (366), 276 states have internal predecessors, (366), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:08,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 373 transitions. [2022-01-31 17:48:08,009 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 373 transitions. Word has length 267 [2022-01-31 17:48:08,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:08,009 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 373 transitions. [2022-01-31 17:48:08,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0434782608695654) internal successors, (140), 45 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:08,009 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 373 transitions. [2022-01-31 17:48:08,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-01-31 17:48:08,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:08,010 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:08,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:48:08,010 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:08,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:08,011 INFO L85 PathProgramCache]: Analyzing trace with hash 2028535545, now seen corresponding path program 43 times [2022-01-31 17:48:08,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:08,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137568352] [2022-01-31 17:48:08,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:08,013 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:08,013 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:08,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:08,017 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:08,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:08,734 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:08,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137568352] [2022-01-31 17:48:08,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [137568352] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:08,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:08,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:48:08,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61751095] [2022-01-31 17:48:08,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:08,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:48:08,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:08,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:48:08,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:48:08,735 INFO L87 Difference]: Start difference. First operand 283 states and 373 transitions. Second operand has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 46 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:09,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:09,955 INFO L93 Difference]: Finished difference Result 440 states and 582 transitions. [2022-01-31 17:48:09,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:48:09,956 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 46 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 273 [2022-01-31 17:48:09,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:09,957 INFO L225 Difference]: With dead ends: 440 [2022-01-31 17:48:09,957 INFO L226 Difference]: Without dead ends: 293 [2022-01-31 17:48:09,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:48:09,959 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 942 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:09,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [944 Valid, 59 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:09,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-31 17:48:10,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 289. [2022-01-31 17:48:10,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 282 states have (on average 1.326241134751773) internal successors, (374), 282 states have internal predecessors, (374), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:10,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 381 transitions. [2022-01-31 17:48:10,034 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 381 transitions. Word has length 273 [2022-01-31 17:48:10,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:10,035 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 381 transitions. [2022-01-31 17:48:10,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 46 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:10,035 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 381 transitions. [2022-01-31 17:48:10,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-01-31 17:48:10,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:10,036 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:10,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:48:10,036 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:10,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:10,037 INFO L85 PathProgramCache]: Analyzing trace with hash -700131821, now seen corresponding path program 44 times [2022-01-31 17:48:10,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:10,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599833810] [2022-01-31 17:48:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:10,040 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:10,040 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:10,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:10,045 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:10,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:10,775 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:10,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599833810] [2022-01-31 17:48:10,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1599833810] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:10,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:10,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:48:10,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436523051] [2022-01-31 17:48:10,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:10,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:48:10,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:10,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:48:10,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:48:10,779 INFO L87 Difference]: Start difference. First operand 289 states and 381 transitions. Second operand has 48 states, 48 states have (on average 3.0416666666666665) internal successors, (146), 47 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:12,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:12,020 INFO L93 Difference]: Finished difference Result 449 states and 594 transitions. [2022-01-31 17:48:12,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:48:12,020 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0416666666666665) internal successors, (146), 47 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2022-01-31 17:48:12,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:12,021 INFO L225 Difference]: With dead ends: 449 [2022-01-31 17:48:12,021 INFO L226 Difference]: Without dead ends: 299 [2022-01-31 17:48:12,022 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 17:48:12,022 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 962 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:12,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [964 Valid, 69 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:12,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-31 17:48:12,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 295. [2022-01-31 17:48:12,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 288 states have (on average 1.3263888888888888) internal successors, (382), 288 states have internal predecessors, (382), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:12,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 389 transitions. [2022-01-31 17:48:12,071 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 389 transitions. Word has length 279 [2022-01-31 17:48:12,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:12,072 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 389 transitions. [2022-01-31 17:48:12,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0416666666666665) internal successors, (146), 47 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:12,072 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 389 transitions. [2022-01-31 17:48:12,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-01-31 17:48:12,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:12,073 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:12,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:48:12,073 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:12,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:12,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1770939591, now seen corresponding path program 45 times [2022-01-31 17:48:12,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:12,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357254365] [2022-01-31 17:48:12,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:12,075 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:12,075 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:12,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:12,079 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:12,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:12,850 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:12,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357254365] [2022-01-31 17:48:12,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [357254365] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:12,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:12,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:48:12,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262708615] [2022-01-31 17:48:12,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:12,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:48:12,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:12,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:48:12,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:48:12,852 INFO L87 Difference]: Start difference. First operand 295 states and 389 transitions. Second operand has 49 states, 49 states have (on average 3.0408163265306123) internal successors, (149), 48 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:14,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:14,136 INFO L93 Difference]: Finished difference Result 458 states and 606 transitions. [2022-01-31 17:48:14,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:48:14,137 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.0408163265306123) internal successors, (149), 48 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 285 [2022-01-31 17:48:14,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:14,138 INFO L225 Difference]: With dead ends: 458 [2022-01-31 17:48:14,138 INFO L226 Difference]: Without dead ends: 305 [2022-01-31 17:48:14,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:48:14,139 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 974 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:14,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [976 Valid, 49 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:14,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-01-31 17:48:14,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 301. [2022-01-31 17:48:14,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 294 states have (on average 1.3265306122448979) internal successors, (390), 294 states have internal predecessors, (390), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:14,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 397 transitions. [2022-01-31 17:48:14,190 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 397 transitions. Word has length 285 [2022-01-31 17:48:14,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:14,190 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 397 transitions. [2022-01-31 17:48:14,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.0408163265306123) internal successors, (149), 48 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:14,191 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 397 transitions. [2022-01-31 17:48:14,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 17:48:14,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:14,192 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:14,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:48:14,192 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:14,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:14,192 INFO L85 PathProgramCache]: Analyzing trace with hash 786056915, now seen corresponding path program 46 times [2022-01-31 17:48:14,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:14,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098971978] [2022-01-31 17:48:14,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:14,194 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:14,194 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:14,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:14,198 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:15,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:15,009 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:15,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098971978] [2022-01-31 17:48:15,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1098971978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:15,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:15,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:48:15,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766980200] [2022-01-31 17:48:15,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:15,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:48:15,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:15,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:48:15,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:48:15,011 INFO L87 Difference]: Start difference. First operand 301 states and 397 transitions. Second operand has 50 states, 50 states have (on average 3.04) internal successors, (152), 49 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:16,367 INFO L93 Difference]: Finished difference Result 467 states and 618 transitions. [2022-01-31 17:48:16,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:48:16,367 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 49 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 291 [2022-01-31 17:48:16,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:16,368 INFO L225 Difference]: With dead ends: 467 [2022-01-31 17:48:16,368 INFO L226 Difference]: Without dead ends: 311 [2022-01-31 17:48:16,369 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 17:48:16,370 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1126 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:16,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1128 Valid, 44 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:16,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-01-31 17:48:16,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 307. [2022-01-31 17:48:16,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 300 states have (on average 1.3266666666666667) internal successors, (398), 300 states have internal predecessors, (398), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:16,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 405 transitions. [2022-01-31 17:48:16,422 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 405 transitions. Word has length 291 [2022-01-31 17:48:16,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:16,422 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 405 transitions. [2022-01-31 17:48:16,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 49 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:16,423 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 405 transitions. [2022-01-31 17:48:16,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-01-31 17:48:16,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:16,424 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:16,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:48:16,424 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:16,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:16,424 INFO L85 PathProgramCache]: Analyzing trace with hash -106420359, now seen corresponding path program 47 times [2022-01-31 17:48:16,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:16,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894495254] [2022-01-31 17:48:16,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:16,426 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:16,426 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:16,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:16,430 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:17,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:17,334 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:17,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894495254] [2022-01-31 17:48:17,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [894495254] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:17,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:17,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:48:17,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321061555] [2022-01-31 17:48:17,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:17,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:48:17,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:17,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:48:17,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:48:17,336 INFO L87 Difference]: Start difference. First operand 307 states and 405 transitions. Second operand has 51 states, 51 states have (on average 3.0392156862745097) internal successors, (155), 50 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:18,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:18,736 INFO L93 Difference]: Finished difference Result 476 states and 630 transitions. [2022-01-31 17:48:18,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:48:18,737 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.0392156862745097) internal successors, (155), 50 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 297 [2022-01-31 17:48:18,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:18,738 INFO L225 Difference]: With dead ends: 476 [2022-01-31 17:48:18,738 INFO L226 Difference]: Without dead ends: 317 [2022-01-31 17:48:18,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:48:18,739 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 922 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:18,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 64 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:18,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-01-31 17:48:18,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 313. [2022-01-31 17:48:18,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 306 states have (on average 1.326797385620915) internal successors, (406), 306 states have internal predecessors, (406), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:18,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 413 transitions. [2022-01-31 17:48:18,794 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 413 transitions. Word has length 297 [2022-01-31 17:48:18,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:18,794 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 413 transitions. [2022-01-31 17:48:18,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.0392156862745097) internal successors, (155), 50 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:18,794 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 413 transitions. [2022-01-31 17:48:18,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-01-31 17:48:18,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:18,795 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:18,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:48:18,795 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:18,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:18,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1531689069, now seen corresponding path program 48 times [2022-01-31 17:48:18,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:18,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711317849] [2022-01-31 17:48:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:18,797 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:18,797 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:18,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:18,802 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:19,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:19,628 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:19,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711317849] [2022-01-31 17:48:19,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1711317849] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:19,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:19,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:48:19,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182611546] [2022-01-31 17:48:19,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:19,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:48:19,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:19,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:48:19,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:48:19,629 INFO L87 Difference]: Start difference. First operand 313 states and 413 transitions. Second operand has 52 states, 52 states have (on average 3.0384615384615383) internal successors, (158), 51 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:21,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:21,075 INFO L93 Difference]: Finished difference Result 485 states and 642 transitions. [2022-01-31 17:48:21,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:48:21,076 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.0384615384615383) internal successors, (158), 51 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 303 [2022-01-31 17:48:21,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:21,077 INFO L225 Difference]: With dead ends: 485 [2022-01-31 17:48:21,077 INFO L226 Difference]: Without dead ends: 323 [2022-01-31 17:48:21,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:48:21,078 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1234 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:21,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1236 Valid, 34 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:21,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-01-31 17:48:21,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 319. [2022-01-31 17:48:21,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 312 states have (on average 1.3269230769230769) internal successors, (414), 312 states have internal predecessors, (414), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:21,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 421 transitions. [2022-01-31 17:48:21,136 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 421 transitions. Word has length 303 [2022-01-31 17:48:21,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:21,136 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 421 transitions. [2022-01-31 17:48:21,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.0384615384615383) internal successors, (158), 51 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:21,136 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 421 transitions. [2022-01-31 17:48:21,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-01-31 17:48:21,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:21,138 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:21,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:48:21,138 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:21,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:21,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1059627961, now seen corresponding path program 49 times [2022-01-31 17:48:21,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:21,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527941959] [2022-01-31 17:48:21,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:21,140 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:21,140 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:21,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:21,144 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:22,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:22,031 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:22,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527941959] [2022-01-31 17:48:22,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [527941959] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:22,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:22,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:48:22,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863133152] [2022-01-31 17:48:22,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:22,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:48:22,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:22,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:48:22,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:48:22,033 INFO L87 Difference]: Start difference. First operand 319 states and 421 transitions. Second operand has 53 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 52 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:23,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:23,505 INFO L93 Difference]: Finished difference Result 494 states and 654 transitions. [2022-01-31 17:48:23,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:48:23,505 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 52 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 309 [2022-01-31 17:48:23,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:23,506 INFO L225 Difference]: With dead ends: 494 [2022-01-31 17:48:23,506 INFO L226 Difference]: Without dead ends: 329 [2022-01-31 17:48:23,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:48:23,508 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1306 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1308 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:23,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1308 Valid, 49 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:23,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-01-31 17:48:23,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 325. [2022-01-31 17:48:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 318 states have (on average 1.3270440251572326) internal successors, (422), 318 states have internal predecessors, (422), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:23,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 429 transitions. [2022-01-31 17:48:23,597 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 429 transitions. Word has length 309 [2022-01-31 17:48:23,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:23,597 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 429 transitions. [2022-01-31 17:48:23,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 52 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:23,598 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 429 transitions. [2022-01-31 17:48:23,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-01-31 17:48:23,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:23,599 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:23,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:48:23,599 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:23,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:23,599 INFO L85 PathProgramCache]: Analyzing trace with hash -722020269, now seen corresponding path program 50 times [2022-01-31 17:48:23,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:23,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729635666] [2022-01-31 17:48:23,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:23,602 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:23,602 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:23,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:23,607 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:24,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:24,518 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:24,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729635666] [2022-01-31 17:48:24,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [729635666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:24,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:24,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:48:24,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503837091] [2022-01-31 17:48:24,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:24,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:48:24,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:24,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:48:24,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:48:24,520 INFO L87 Difference]: Start difference. First operand 325 states and 429 transitions. Second operand has 54 states, 54 states have (on average 3.037037037037037) internal successors, (164), 53 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:26,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:26,077 INFO L93 Difference]: Finished difference Result 503 states and 666 transitions. [2022-01-31 17:48:26,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:48:26,077 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.037037037037037) internal successors, (164), 53 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 315 [2022-01-31 17:48:26,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:26,078 INFO L225 Difference]: With dead ends: 503 [2022-01-31 17:48:26,078 INFO L226 Difference]: Without dead ends: 335 [2022-01-31 17:48:26,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:48:26,081 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1150 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:26,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1152 Valid, 59 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:26,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-01-31 17:48:26,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 331. [2022-01-31 17:48:26,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 324 states have (on average 1.3271604938271604) internal successors, (430), 324 states have internal predecessors, (430), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:26,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 437 transitions. [2022-01-31 17:48:26,143 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 437 transitions. Word has length 315 [2022-01-31 17:48:26,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:26,143 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 437 transitions. [2022-01-31 17:48:26,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.037037037037037) internal successors, (164), 53 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:26,143 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 437 transitions. [2022-01-31 17:48:26,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-01-31 17:48:26,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:26,144 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:26,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:48:26,144 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:26,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:26,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1720651769, now seen corresponding path program 51 times [2022-01-31 17:48:26,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:26,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960382372] [2022-01-31 17:48:26,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:26,146 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:26,146 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:26,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:26,151 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:27,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:27,089 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:27,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960382372] [2022-01-31 17:48:27,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [960382372] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:27,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:27,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:48:27,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225711486] [2022-01-31 17:48:27,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:27,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:48:27,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:27,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:48:27,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:48:27,091 INFO L87 Difference]: Start difference. First operand 331 states and 437 transitions. Second operand has 55 states, 55 states have (on average 3.036363636363636) internal successors, (167), 54 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:28,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:28,735 INFO L93 Difference]: Finished difference Result 512 states and 678 transitions. [2022-01-31 17:48:28,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:48:28,735 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.036363636363636) internal successors, (167), 54 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 321 [2022-01-31 17:48:28,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:28,736 INFO L225 Difference]: With dead ends: 512 [2022-01-31 17:48:28,736 INFO L226 Difference]: Without dead ends: 341 [2022-01-31 17:48:28,737 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 17:48:28,737 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1274 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1276 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:28,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1276 Valid, 49 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:28,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-01-31 17:48:28,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 337. [2022-01-31 17:48:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 330 states have (on average 1.3272727272727274) internal successors, (438), 330 states have internal predecessors, (438), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:28,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 445 transitions. [2022-01-31 17:48:28,802 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 445 transitions. Word has length 321 [2022-01-31 17:48:28,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:28,802 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 445 transitions. [2022-01-31 17:48:28,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.036363636363636) internal successors, (167), 54 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:28,802 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 445 transitions. [2022-01-31 17:48:28,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-01-31 17:48:28,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:28,803 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:28,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:48:28,804 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:28,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:28,804 INFO L85 PathProgramCache]: Analyzing trace with hash 969275667, now seen corresponding path program 52 times [2022-01-31 17:48:28,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:28,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633736107] [2022-01-31 17:48:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:28,806 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:28,806 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:28,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:28,810 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:29,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:29,776 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:29,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633736107] [2022-01-31 17:48:29,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [633736107] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:29,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:29,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:48:29,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422022006] [2022-01-31 17:48:29,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:29,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:48:29,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:29,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:48:29,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:48:29,777 INFO L87 Difference]: Start difference. First operand 337 states and 445 transitions. Second operand has 56 states, 56 states have (on average 3.0357142857142856) internal successors, (170), 55 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:31,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:31,402 INFO L93 Difference]: Finished difference Result 521 states and 690 transitions. [2022-01-31 17:48:31,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:48:31,403 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.0357142857142856) internal successors, (170), 55 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 327 [2022-01-31 17:48:31,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:31,404 INFO L225 Difference]: With dead ends: 521 [2022-01-31 17:48:31,404 INFO L226 Difference]: Without dead ends: 347 [2022-01-31 17:48:31,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:48:31,405 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1242 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1244 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:31,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1244 Valid, 54 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:31,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-01-31 17:48:31,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 343. [2022-01-31 17:48:31,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 336 states have (on average 1.3273809523809523) internal successors, (446), 336 states have internal predecessors, (446), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:31,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 453 transitions. [2022-01-31 17:48:31,479 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 453 transitions. Word has length 327 [2022-01-31 17:48:31,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:31,479 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 453 transitions. [2022-01-31 17:48:31,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.0357142857142856) internal successors, (170), 55 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:31,479 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 453 transitions. [2022-01-31 17:48:31,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-01-31 17:48:31,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:31,480 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:31,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:48:31,480 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:31,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:31,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1837667271, now seen corresponding path program 53 times [2022-01-31 17:48:31,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:31,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373829899] [2022-01-31 17:48:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:31,482 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:31,482 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:31,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:31,487 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:32,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:32,478 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:32,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373829899] [2022-01-31 17:48:32,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1373829899] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:32,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:32,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:48:32,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740116128] [2022-01-31 17:48:32,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:32,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:48:32,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:32,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:48:32,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:48:32,480 INFO L87 Difference]: Start difference. First operand 343 states and 453 transitions. Second operand has 57 states, 57 states have (on average 3.0350877192982457) internal successors, (173), 56 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:34,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:34,363 INFO L93 Difference]: Finished difference Result 530 states and 702 transitions. [2022-01-31 17:48:34,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:48:34,363 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.0350877192982457) internal successors, (173), 56 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 333 [2022-01-31 17:48:34,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:34,364 INFO L225 Difference]: With dead ends: 530 [2022-01-31 17:48:34,364 INFO L226 Difference]: Without dead ends: 353 [2022-01-31 17:48:34,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:48:34,365 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1146 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:34,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1148 Valid, 64 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:48:34,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-01-31 17:48:34,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 349. [2022-01-31 17:48:34,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 342 states have (on average 1.327485380116959) internal successors, (454), 342 states have internal predecessors, (454), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 461 transitions. [2022-01-31 17:48:34,434 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 461 transitions. Word has length 333 [2022-01-31 17:48:34,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:34,434 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 461 transitions. [2022-01-31 17:48:34,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.0350877192982457) internal successors, (173), 56 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:34,434 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 461 transitions. [2022-01-31 17:48:34,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-01-31 17:48:34,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:34,436 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:34,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:48:34,436 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:34,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:34,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1782950355, now seen corresponding path program 54 times [2022-01-31 17:48:34,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:34,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068052649] [2022-01-31 17:48:34,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:34,438 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:34,438 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:34,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:34,443 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:35,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:35,532 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:35,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068052649] [2022-01-31 17:48:35,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2068052649] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:35,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:35,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:48:35,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402562653] [2022-01-31 17:48:35,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:35,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:48:35,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:35,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:48:35,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:48:35,533 INFO L87 Difference]: Start difference. First operand 349 states and 461 transitions. Second operand has 58 states, 58 states have (on average 3.0344827586206895) internal successors, (176), 57 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:37,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:37,312 INFO L93 Difference]: Finished difference Result 539 states and 714 transitions. [2022-01-31 17:48:37,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:48:37,312 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.0344827586206895) internal successors, (176), 57 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 339 [2022-01-31 17:48:37,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:37,313 INFO L225 Difference]: With dead ends: 539 [2022-01-31 17:48:37,313 INFO L226 Difference]: Without dead ends: 359 [2022-01-31 17:48:37,314 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 17:48:37,314 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1450 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:37,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1452 Valid, 49 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:37,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-31 17:48:37,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 355. [2022-01-31 17:48:37,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 348 states have (on average 1.3275862068965518) internal successors, (462), 348 states have internal predecessors, (462), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 469 transitions. [2022-01-31 17:48:37,387 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 469 transitions. Word has length 339 [2022-01-31 17:48:37,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:37,387 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 469 transitions. [2022-01-31 17:48:37,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.0344827586206895) internal successors, (176), 57 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:37,388 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 469 transitions. [2022-01-31 17:48:37,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-01-31 17:48:37,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:37,389 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:37,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:48:37,389 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:37,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:37,389 INFO L85 PathProgramCache]: Analyzing trace with hash -931284871, now seen corresponding path program 55 times [2022-01-31 17:48:37,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:37,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878482183] [2022-01-31 17:48:37,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:37,391 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:37,391 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:37,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:37,397 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:38,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:38,434 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:38,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878482183] [2022-01-31 17:48:38,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1878482183] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:38,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:38,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:48:38,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332600244] [2022-01-31 17:48:38,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:38,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:48:38,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:38,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:48:38,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:48:38,435 INFO L87 Difference]: Start difference. First operand 355 states and 469 transitions. Second operand has 59 states, 59 states have (on average 3.0338983050847457) internal successors, (179), 58 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:40,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:40,253 INFO L93 Difference]: Finished difference Result 548 states and 726 transitions. [2022-01-31 17:48:40,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:48:40,253 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.0338983050847457) internal successors, (179), 58 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 345 [2022-01-31 17:48:40,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:40,254 INFO L225 Difference]: With dead ends: 548 [2022-01-31 17:48:40,254 INFO L226 Difference]: Without dead ends: 365 [2022-01-31 17:48:40,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:48:40,255 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1222 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:40,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1224 Valid, 59 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:40,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-01-31 17:48:40,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 361. [2022-01-31 17:48:40,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 354 states have (on average 1.3276836158192091) internal successors, (470), 354 states have internal predecessors, (470), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:40,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 477 transitions. [2022-01-31 17:48:40,327 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 477 transitions. Word has length 345 [2022-01-31 17:48:40,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:40,328 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 477 transitions. [2022-01-31 17:48:40,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.0338983050847457) internal successors, (179), 58 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:40,328 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 477 transitions. [2022-01-31 17:48:40,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-01-31 17:48:40,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:40,329 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:40,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:48:40,329 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:40,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:40,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1520036499, now seen corresponding path program 56 times [2022-01-31 17:48:40,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:40,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472654169] [2022-01-31 17:48:40,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:40,331 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:40,331 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:40,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:40,337 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:41,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:41,406 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:41,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472654169] [2022-01-31 17:48:41,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1472654169] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:41,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:41,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:48:41,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576572625] [2022-01-31 17:48:41,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:41,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:48:41,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:41,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:48:41,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:48:41,408 INFO L87 Difference]: Start difference. First operand 361 states and 477 transitions. Second operand has 60 states, 60 states have (on average 3.033333333333333) internal successors, (182), 59 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:43,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:43,265 INFO L93 Difference]: Finished difference Result 557 states and 738 transitions. [2022-01-31 17:48:43,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:48:43,265 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.033333333333333) internal successors, (182), 59 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 351 [2022-01-31 17:48:43,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:43,266 INFO L225 Difference]: With dead ends: 557 [2022-01-31 17:48:43,266 INFO L226 Difference]: Without dead ends: 371 [2022-01-31 17:48:43,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:48:43,267 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1226 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1228 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:43,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1228 Valid, 54 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:43,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-01-31 17:48:43,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 367. [2022-01-31 17:48:43,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 360 states have (on average 1.3277777777777777) internal successors, (478), 360 states have internal predecessors, (478), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:43,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 485 transitions. [2022-01-31 17:48:43,342 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 485 transitions. Word has length 351 [2022-01-31 17:48:43,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:43,342 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 485 transitions. [2022-01-31 17:48:43,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.033333333333333) internal successors, (182), 59 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:43,343 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 485 transitions. [2022-01-31 17:48:43,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-01-31 17:48:43,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:43,344 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:43,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:48:43,344 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:43,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:43,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1321339719, now seen corresponding path program 57 times [2022-01-31 17:48:43,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:43,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381472418] [2022-01-31 17:48:43,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:43,346 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:43,346 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:43,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:43,352 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:43,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:44,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:44,476 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:44,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381472418] [2022-01-31 17:48:44,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1381472418] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:44,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:44,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:48:44,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100403090] [2022-01-31 17:48:44,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:44,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:48:44,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:44,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:48:44,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:48:44,478 INFO L87 Difference]: Start difference. First operand 367 states and 485 transitions. Second operand has 61 states, 61 states have (on average 3.0327868852459017) internal successors, (185), 60 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:46,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:46,411 INFO L93 Difference]: Finished difference Result 566 states and 750 transitions. [2022-01-31 17:48:46,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:48:46,411 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.0327868852459017) internal successors, (185), 60 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 357 [2022-01-31 17:48:46,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:46,412 INFO L225 Difference]: With dead ends: 566 [2022-01-31 17:48:46,412 INFO L226 Difference]: Without dead ends: 377 [2022-01-31 17:48:46,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:48:46,413 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1378 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1380 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:46,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1380 Valid, 49 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:48:46,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-01-31 17:48:46,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 373. [2022-01-31 17:48:46,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 366 states have (on average 1.3278688524590163) internal successors, (486), 366 states have internal predecessors, (486), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:46,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 493 transitions. [2022-01-31 17:48:46,490 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 493 transitions. Word has length 357 [2022-01-31 17:48:46,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:46,491 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 493 transitions. [2022-01-31 17:48:46,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.0327868852459017) internal successors, (185), 60 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:46,491 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 493 transitions. [2022-01-31 17:48:46,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-01-31 17:48:46,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:46,492 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:46,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:48:46,492 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:46,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:46,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1679377581, now seen corresponding path program 58 times [2022-01-31 17:48:46,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:46,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112971855] [2022-01-31 17:48:46,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:46,494 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:46,494 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:46,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:46,500 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:47,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:47,710 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:47,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112971855] [2022-01-31 17:48:47,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [112971855] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:47,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:47,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:48:47,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483207939] [2022-01-31 17:48:47,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:47,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:48:47,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:47,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:48:47,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:48:47,711 INFO L87 Difference]: Start difference. First operand 373 states and 493 transitions. Second operand has 62 states, 62 states have (on average 3.032258064516129) internal successors, (188), 61 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:49,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:49,680 INFO L93 Difference]: Finished difference Result 575 states and 762 transitions. [2022-01-31 17:48:49,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:48:49,680 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.032258064516129) internal successors, (188), 61 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 363 [2022-01-31 17:48:49,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:49,681 INFO L225 Difference]: With dead ends: 575 [2022-01-31 17:48:49,681 INFO L226 Difference]: Without dead ends: 383 [2022-01-31 17:48:49,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:48:49,682 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1198 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:49,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1200 Valid, 74 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:48:49,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-01-31 17:48:49,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 379. [2022-01-31 17:48:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 372 states have (on average 1.3279569892473118) internal successors, (494), 372 states have internal predecessors, (494), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 501 transitions. [2022-01-31 17:48:49,763 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 501 transitions. Word has length 363 [2022-01-31 17:48:49,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:49,763 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 501 transitions. [2022-01-31 17:48:49,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.032258064516129) internal successors, (188), 61 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:49,763 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 501 transitions. [2022-01-31 17:48:49,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-01-31 17:48:49,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:49,764 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:49,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:48:49,764 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:49,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:49,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1481908473, now seen corresponding path program 59 times [2022-01-31 17:48:49,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:49,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059821311] [2022-01-31 17:48:49,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:49,766 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:49,766 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:49,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:49,772 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:50,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:50,955 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:50,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059821311] [2022-01-31 17:48:50,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2059821311] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:50,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:50,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:48:50,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171380408] [2022-01-31 17:48:50,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:50,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:48:50,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:50,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:48:50,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:48:50,956 INFO L87 Difference]: Start difference. First operand 379 states and 501 transitions. Second operand has 63 states, 63 states have (on average 3.0317460317460316) internal successors, (191), 62 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:52,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:52,941 INFO L93 Difference]: Finished difference Result 584 states and 774 transitions. [2022-01-31 17:48:52,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:48:52,941 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.0317460317460316) internal successors, (191), 62 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 369 [2022-01-31 17:48:52,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:52,942 INFO L225 Difference]: With dead ends: 584 [2022-01-31 17:48:52,942 INFO L226 Difference]: Without dead ends: 389 [2022-01-31 17:48:52,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:48:52,943 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1302 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1304 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:52,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1304 Valid, 49 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:52,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-01-31 17:48:53,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 385. [2022-01-31 17:48:53,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 378 states have (on average 1.3280423280423281) internal successors, (502), 378 states have internal predecessors, (502), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:53,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 509 transitions. [2022-01-31 17:48:53,028 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 509 transitions. Word has length 369 [2022-01-31 17:48:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:53,028 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 509 transitions. [2022-01-31 17:48:53,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.0317460317460316) internal successors, (191), 62 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:53,028 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 509 transitions. [2022-01-31 17:48:53,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-01-31 17:48:53,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:53,029 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:53,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:48:53,029 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:53,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:53,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1672471533, now seen corresponding path program 60 times [2022-01-31 17:48:53,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:53,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245729911] [2022-01-31 17:48:53,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:53,031 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:53,032 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:53,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:53,037 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:54,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:54,281 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 17:48:54,281 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:54,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245729911] [2022-01-31 17:48:54,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [245729911] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:54,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:54,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:48:54,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312480367] [2022-01-31 17:48:54,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:54,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:48:54,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:54,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:48:54,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:48:54,283 INFO L87 Difference]: Start difference. First operand 385 states and 509 transitions. Second operand has 64 states, 64 states have (on average 3.03125) internal successors, (194), 63 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:56,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:56,328 INFO L93 Difference]: Finished difference Result 593 states and 786 transitions. [2022-01-31 17:48:56,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:48:56,328 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.03125) internal successors, (194), 63 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 375 [2022-01-31 17:48:56,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:56,329 INFO L225 Difference]: With dead ends: 593 [2022-01-31 17:48:56,329 INFO L226 Difference]: Without dead ends: 395 [2022-01-31 17:48:56,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:48:56,330 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1258 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1260 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:56,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1260 Valid, 59 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:48:56,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-01-31 17:48:56,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 391. [2022-01-31 17:48:56,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 384 states have (on average 1.328125) internal successors, (510), 384 states have internal predecessors, (510), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:56,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 517 transitions. [2022-01-31 17:48:56,417 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 517 transitions. Word has length 375 [2022-01-31 17:48:56,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:56,417 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 517 transitions. [2022-01-31 17:48:56,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.03125) internal successors, (194), 63 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:56,417 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 517 transitions. [2022-01-31 17:48:56,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-01-31 17:48:56,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:56,418 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:56,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:48:56,419 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:56,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:56,419 INFO L85 PathProgramCache]: Analyzing trace with hash -329499335, now seen corresponding path program 61 times [2022-01-31 17:48:56,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:56,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731803873] [2022-01-31 17:48:56,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:56,421 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:56,421 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:56,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:56,426 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:57,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:57,695 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:57,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731803873] [2022-01-31 17:48:57,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [731803873] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:57,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:57,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:48:57,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947555404] [2022-01-31 17:48:57,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:57,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:48:57,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:57,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:48:57,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:48:57,697 INFO L87 Difference]: Start difference. First operand 391 states and 517 transitions. Second operand has 65 states, 65 states have (on average 3.0307692307692307) internal successors, (197), 64 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:59,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:59,882 INFO L93 Difference]: Finished difference Result 602 states and 798 transitions. [2022-01-31 17:48:59,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:48:59,882 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.0307692307692307) internal successors, (197), 64 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 381 [2022-01-31 17:48:59,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:59,884 INFO L225 Difference]: With dead ends: 602 [2022-01-31 17:48:59,884 INFO L226 Difference]: Without dead ends: 401 [2022-01-31 17:48:59,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:48:59,885 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1482 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:59,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1484 Valid, 49 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:48:59,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-01-31 17:48:59,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 397. [2022-01-31 17:48:59,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 390 states have (on average 1.3282051282051281) internal successors, (518), 390 states have internal predecessors, (518), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:48:59,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 525 transitions. [2022-01-31 17:48:59,983 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 525 transitions. Word has length 381 [2022-01-31 17:48:59,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:59,983 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 525 transitions. [2022-01-31 17:48:59,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.0307692307692307) internal successors, (197), 64 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:59,983 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 525 transitions. [2022-01-31 17:48:59,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-01-31 17:48:59,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:59,985 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:59,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:48:59,985 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:59,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:59,985 INFO L85 PathProgramCache]: Analyzing trace with hash -419820333, now seen corresponding path program 62 times [2022-01-31 17:48:59,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:59,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219856019] [2022-01-31 17:48:59,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:59,987 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:59,987 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:59,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:59,993 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:01,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:01,277 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:01,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219856019] [2022-01-31 17:49:01,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [219856019] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:01,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:01,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:49:01,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410826343] [2022-01-31 17:49:01,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:01,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:49:01,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:01,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:49:01,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:49:01,280 INFO L87 Difference]: Start difference. First operand 397 states and 525 transitions. Second operand has 66 states, 66 states have (on average 3.0303030303030303) internal successors, (200), 65 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:03,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:03,607 INFO L93 Difference]: Finished difference Result 611 states and 810 transitions. [2022-01-31 17:49:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:49:03,607 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.0303030303030303) internal successors, (200), 65 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 387 [2022-01-31 17:49:03,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:03,608 INFO L225 Difference]: With dead ends: 611 [2022-01-31 17:49:03,608 INFO L226 Difference]: Without dead ends: 407 [2022-01-31 17:49:03,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:49:03,609 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1322 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1324 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:03,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1324 Valid, 59 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:49:03,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-01-31 17:49:03,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 403. [2022-01-31 17:49:03,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 396 states have (on average 1.3282828282828283) internal successors, (526), 396 states have internal predecessors, (526), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:49:03,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 533 transitions. [2022-01-31 17:49:03,703 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 533 transitions. Word has length 387 [2022-01-31 17:49:03,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:03,703 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 533 transitions. [2022-01-31 17:49:03,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.0303030303030303) internal successors, (200), 65 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:03,703 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 533 transitions. [2022-01-31 17:49:03,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2022-01-31 17:49:03,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:03,705 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:03,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:49:03,705 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:03,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:03,705 INFO L85 PathProgramCache]: Analyzing trace with hash 2129807737, now seen corresponding path program 63 times [2022-01-31 17:49:03,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:03,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578082256] [2022-01-31 17:49:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:03,707 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:03,707 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:03,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:03,713 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:05,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:05,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:05,056 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:05,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578082256] [2022-01-31 17:49:05,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [578082256] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:05,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:05,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:49:05,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933721059] [2022-01-31 17:49:05,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:05,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:49:05,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:05,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:49:05,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:49:05,058 INFO L87 Difference]: Start difference. First operand 403 states and 533 transitions. Second operand has 67 states, 67 states have (on average 3.029850746268657) internal successors, (203), 66 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:07,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:07,356 INFO L93 Difference]: Finished difference Result 620 states and 822 transitions. [2022-01-31 17:49:07,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:49:07,357 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.029850746268657) internal successors, (203), 66 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 393 [2022-01-31 17:49:07,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:07,358 INFO L225 Difference]: With dead ends: 620 [2022-01-31 17:49:07,358 INFO L226 Difference]: Without dead ends: 413 [2022-01-31 17:49:07,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:49:07,359 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1586 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1588 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:07,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1588 Valid, 44 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:49:07,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-01-31 17:49:07,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 409. [2022-01-31 17:49:07,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 402 states have (on average 1.328358208955224) internal successors, (534), 402 states have internal predecessors, (534), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:49:07,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 541 transitions. [2022-01-31 17:49:07,453 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 541 transitions. Word has length 393 [2022-01-31 17:49:07,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:07,453 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 541 transitions. [2022-01-31 17:49:07,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.029850746268657) internal successors, (203), 66 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:07,453 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 541 transitions. [2022-01-31 17:49:07,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-01-31 17:49:07,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:07,454 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:07,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:49:07,455 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:07,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1678282131, now seen corresponding path program 64 times [2022-01-31 17:49:07,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:07,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876479178] [2022-01-31 17:49:07,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:07,457 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:07,457 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:07,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:07,464 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:08,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:08,812 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:08,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876479178] [2022-01-31 17:49:08,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1876479178] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:08,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:08,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:49:08,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707521618] [2022-01-31 17:49:08,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:08,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:49:08,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:08,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:49:08,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:49:08,814 INFO L87 Difference]: Start difference. First operand 409 states and 541 transitions. Second operand has 68 states, 68 states have (on average 3.0294117647058822) internal successors, (206), 67 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:11,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:11,140 INFO L93 Difference]: Finished difference Result 629 states and 834 transitions. [2022-01-31 17:49:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:49:11,140 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.0294117647058822) internal successors, (206), 67 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 399 [2022-01-31 17:49:11,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:11,141 INFO L225 Difference]: With dead ends: 629 [2022-01-31 17:49:11,141 INFO L226 Difference]: Without dead ends: 419 [2022-01-31 17:49:11,151 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 17:49:11,152 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1554 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1556 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:11,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1556 Valid, 44 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:49:11,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-01-31 17:49:11,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 415. [2022-01-31 17:49:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 408 states have (on average 1.3284313725490196) internal successors, (542), 408 states have internal predecessors, (542), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:49:11,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 549 transitions. [2022-01-31 17:49:11,247 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 549 transitions. Word has length 399 [2022-01-31 17:49:11,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:11,248 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 549 transitions. [2022-01-31 17:49:11,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.0294117647058822) internal successors, (206), 67 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:11,248 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 549 transitions. [2022-01-31 17:49:11,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2022-01-31 17:49:11,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:11,249 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:11,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:49:11,249 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:11,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:11,250 INFO L85 PathProgramCache]: Analyzing trace with hash -994949703, now seen corresponding path program 65 times [2022-01-31 17:49:11,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:11,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678242852] [2022-01-31 17:49:11,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:11,251 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:11,251 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:11,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:11,258 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:12,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:12,655 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:12,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678242852] [2022-01-31 17:49:12,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1678242852] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:12,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:12,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:49:12,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572286502] [2022-01-31 17:49:12,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:12,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:49:12,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:12,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:49:12,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:49:12,657 INFO L87 Difference]: Start difference. First operand 415 states and 549 transitions. Second operand has 69 states, 69 states have (on average 3.028985507246377) internal successors, (209), 68 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:15,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:15,073 INFO L93 Difference]: Finished difference Result 638 states and 846 transitions. [2022-01-31 17:49:15,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:49:15,074 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.028985507246377) internal successors, (209), 68 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 405 [2022-01-31 17:49:15,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:15,075 INFO L225 Difference]: With dead ends: 638 [2022-01-31 17:49:15,075 INFO L226 Difference]: Without dead ends: 425 [2022-01-31 17:49:15,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:49:15,076 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1434 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1436 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:15,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1436 Valid, 69 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:49:15,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-01-31 17:49:15,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 421. [2022-01-31 17:49:15,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 414 states have (on average 1.328502415458937) internal successors, (550), 414 states have internal predecessors, (550), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:49:15,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 557 transitions. [2022-01-31 17:49:15,187 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 557 transitions. Word has length 405 [2022-01-31 17:49:15,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:15,187 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 557 transitions. [2022-01-31 17:49:15,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.028985507246377) internal successors, (209), 68 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:15,187 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 557 transitions. [2022-01-31 17:49:15,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-01-31 17:49:15,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:15,189 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:15,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:49:15,189 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:15,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:15,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1734369709, now seen corresponding path program 66 times [2022-01-31 17:49:15,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:15,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051391146] [2022-01-31 17:49:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:15,191 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:15,191 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:15,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:15,198 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:16,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:16,650 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:16,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051391146] [2022-01-31 17:49:16,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2051391146] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:16,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:16,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:49:16,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560412473] [2022-01-31 17:49:16,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:16,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:49:16,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:16,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:49:16,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:49:16,652 INFO L87 Difference]: Start difference. First operand 421 states and 557 transitions. Second operand has 70 states, 70 states have (on average 3.0285714285714285) internal successors, (212), 69 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:19,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:19,160 INFO L93 Difference]: Finished difference Result 647 states and 858 transitions. [2022-01-31 17:49:19,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:49:19,160 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.0285714285714285) internal successors, (212), 69 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 411 [2022-01-31 17:49:19,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:19,161 INFO L225 Difference]: With dead ends: 647 [2022-01-31 17:49:19,161 INFO L226 Difference]: Without dead ends: 431 [2022-01-31 17:49:19,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:49:19,163 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1582 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1584 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:19,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1584 Valid, 49 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:49:19,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-01-31 17:49:19,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 427. [2022-01-31 17:49:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 420 states have (on average 1.3285714285714285) internal successors, (558), 420 states have internal predecessors, (558), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:49:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 565 transitions. [2022-01-31 17:49:19,264 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 565 transitions. Word has length 411 [2022-01-31 17:49:19,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:19,265 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 565 transitions. [2022-01-31 17:49:19,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.0285714285714285) internal successors, (212), 69 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:19,265 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 565 transitions. [2022-01-31 17:49:19,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-01-31 17:49:19,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:19,266 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:19,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:49:19,267 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:19,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:19,267 INFO L85 PathProgramCache]: Analyzing trace with hash -717737479, now seen corresponding path program 67 times [2022-01-31 17:49:19,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:19,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338472300] [2022-01-31 17:49:19,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:19,268 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:19,269 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:19,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:19,275 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:20,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:20,758 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:20,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338472300] [2022-01-31 17:49:20,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1338472300] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:20,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:20,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:49:20,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027985167] [2022-01-31 17:49:20,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:20,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:49:20,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:20,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:49:20,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:49:20,760 INFO L87 Difference]: Start difference. First operand 427 states and 565 transitions. Second operand has 71 states, 71 states have (on average 3.028169014084507) internal successors, (215), 70 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:23,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:23,281 INFO L93 Difference]: Finished difference Result 656 states and 870 transitions. [2022-01-31 17:49:23,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:49:23,281 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.028169014084507) internal successors, (215), 70 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 417 [2022-01-31 17:49:23,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:23,282 INFO L225 Difference]: With dead ends: 656 [2022-01-31 17:49:23,282 INFO L226 Difference]: Without dead ends: 437 [2022-01-31 17:49:23,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:49:23,283 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1758 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1760 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:23,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1760 Valid, 64 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:49:23,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-01-31 17:49:23,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 433. [2022-01-31 17:49:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 426 states have (on average 1.3286384976525822) internal successors, (566), 426 states have internal predecessors, (566), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:49:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 573 transitions. [2022-01-31 17:49:23,404 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 573 transitions. Word has length 417 [2022-01-31 17:49:23,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:23,404 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 573 transitions. [2022-01-31 17:49:23,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.028169014084507) internal successors, (215), 70 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:23,404 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 573 transitions. [2022-01-31 17:49:23,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2022-01-31 17:49:23,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:23,406 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:23,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:49:23,407 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:23,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:23,407 INFO L85 PathProgramCache]: Analyzing trace with hash -421314797, now seen corresponding path program 68 times [2022-01-31 17:49:23,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:23,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150320308] [2022-01-31 17:49:23,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:23,409 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:23,409 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:23,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:23,416 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:24,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:24,947 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:24,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150320308] [2022-01-31 17:49:24,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1150320308] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:24,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:24,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:49:24,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597447357] [2022-01-31 17:49:24,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:24,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:49:24,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:24,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:49:24,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:49:24,949 INFO L87 Difference]: Start difference. First operand 433 states and 573 transitions. Second operand has 72 states, 72 states have (on average 3.0277777777777777) internal successors, (218), 71 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:27,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:27,586 INFO L93 Difference]: Finished difference Result 665 states and 882 transitions. [2022-01-31 17:49:27,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:49:27,587 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.0277777777777777) internal successors, (218), 71 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 423 [2022-01-31 17:49:27,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:27,588 INFO L225 Difference]: With dead ends: 665 [2022-01-31 17:49:27,588 INFO L226 Difference]: Without dead ends: 443 [2022-01-31 17:49:27,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:49:27,601 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1506 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:27,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1508 Valid, 54 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:49:27,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-01-31 17:49:27,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 439. [2022-01-31 17:49:27,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 432 states have (on average 1.3287037037037037) internal successors, (574), 432 states have internal predecessors, (574), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:49:27,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 581 transitions. [2022-01-31 17:49:27,719 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 581 transitions. Word has length 423 [2022-01-31 17:49:27,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:27,719 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 581 transitions. [2022-01-31 17:49:27,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.0277777777777777) internal successors, (218), 71 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:27,720 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 581 transitions. [2022-01-31 17:49:27,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2022-01-31 17:49:27,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:27,721 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:27,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:49:27,721 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:27,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:27,722 INFO L85 PathProgramCache]: Analyzing trace with hash -350220743, now seen corresponding path program 69 times [2022-01-31 17:49:27,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:27,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864754771] [2022-01-31 17:49:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:27,723 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:27,723 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:27,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:27,731 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:29,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:29,298 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:29,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864754771] [2022-01-31 17:49:29,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1864754771] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:29,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:29,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:49:29,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695941848] [2022-01-31 17:49:29,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:29,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:49:29,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:29,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:49:29,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:49:29,300 INFO L87 Difference]: Start difference. First operand 439 states and 581 transitions. Second operand has 73 states, 73 states have (on average 3.0273972602739727) internal successors, (221), 72 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:32,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:32,040 INFO L93 Difference]: Finished difference Result 674 states and 894 transitions. [2022-01-31 17:49:32,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:49:32,040 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.0273972602739727) internal successors, (221), 72 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 429 [2022-01-31 17:49:32,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:32,041 INFO L225 Difference]: With dead ends: 674 [2022-01-31 17:49:32,041 INFO L226 Difference]: Without dead ends: 449 [2022-01-31 17:49:32,043 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 17:49:32,043 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1770 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1772 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:32,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1772 Valid, 54 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:49:32,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-01-31 17:49:32,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 445. [2022-01-31 17:49:32,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 438 states have (on average 1.3287671232876712) internal successors, (582), 438 states have internal predecessors, (582), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:49:32,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 589 transitions. [2022-01-31 17:49:32,192 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 589 transitions. Word has length 429 [2022-01-31 17:49:32,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:32,192 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 589 transitions. [2022-01-31 17:49:32,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.0273972602739727) internal successors, (221), 72 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:32,193 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 589 transitions. [2022-01-31 17:49:32,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-01-31 17:49:32,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:32,194 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:32,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:49:32,194 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:32,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:32,195 INFO L85 PathProgramCache]: Analyzing trace with hash -839421997, now seen corresponding path program 70 times [2022-01-31 17:49:32,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:32,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425331475] [2022-01-31 17:49:32,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:32,196 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:32,196 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:32,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:32,204 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:34,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:34,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:34,007 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:34,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425331475] [2022-01-31 17:49:34,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1425331475] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:34,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:34,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 17:49:34,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584362517] [2022-01-31 17:49:34,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:34,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 17:49:34,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:34,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 17:49:34,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:49:34,009 INFO L87 Difference]: Start difference. First operand 445 states and 589 transitions. Second operand has 74 states, 74 states have (on average 3.027027027027027) internal successors, (224), 73 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:36,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:36,859 INFO L93 Difference]: Finished difference Result 683 states and 906 transitions. [2022-01-31 17:49:36,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 17:49:36,860 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.027027027027027) internal successors, (224), 73 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 435 [2022-01-31 17:49:36,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:36,861 INFO L225 Difference]: With dead ends: 683 [2022-01-31 17:49:36,861 INFO L226 Difference]: Without dead ends: 455 [2022-01-31 17:49:36,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:49:36,862 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1846 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1848 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:36,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1848 Valid, 44 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:49:36,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-01-31 17:49:36,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 451. [2022-01-31 17:49:36,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 444 states have (on average 1.3288288288288288) internal successors, (590), 444 states have internal predecessors, (590), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:49:36,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 597 transitions. [2022-01-31 17:49:36,988 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 597 transitions. Word has length 435 [2022-01-31 17:49:36,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:36,989 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 597 transitions. [2022-01-31 17:49:36,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.027027027027027) internal successors, (224), 73 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:36,989 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 597 transitions. [2022-01-31 17:49:36,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-01-31 17:49:36,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:36,991 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:36,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:49:36,991 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:36,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:36,991 INFO L85 PathProgramCache]: Analyzing trace with hash 604363385, now seen corresponding path program 71 times [2022-01-31 17:49:36,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:36,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593847220] [2022-01-31 17:49:36,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:36,993 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:36,993 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:36,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:37,001 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:38,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:38,641 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:38,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593847220] [2022-01-31 17:49:38,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1593847220] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:38,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:38,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 17:49:38,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565505343] [2022-01-31 17:49:38,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:38,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 17:49:38,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:38,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 17:49:38,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:49:38,642 INFO L87 Difference]: Start difference. First operand 451 states and 597 transitions. Second operand has 75 states, 75 states have (on average 3.026666666666667) internal successors, (227), 74 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:41,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:41,446 INFO L93 Difference]: Finished difference Result 692 states and 918 transitions. [2022-01-31 17:49:41,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 17:49:41,447 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.026666666666667) internal successors, (227), 74 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 441 [2022-01-31 17:49:41,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:41,448 INFO L225 Difference]: With dead ends: 692 [2022-01-31 17:49:41,448 INFO L226 Difference]: Without dead ends: 461 [2022-01-31 17:49:41,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:49:41,449 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1778 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1780 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:41,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1780 Valid, 49 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:49:41,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-31 17:49:41,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 457. [2022-01-31 17:49:41,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 450 states have (on average 1.3288888888888888) internal successors, (598), 450 states have internal predecessors, (598), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:49:41,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 605 transitions. [2022-01-31 17:49:41,566 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 605 transitions. Word has length 441 [2022-01-31 17:49:41,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:41,566 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 605 transitions. [2022-01-31 17:49:41,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.026666666666667) internal successors, (227), 74 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:41,566 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 605 transitions. [2022-01-31 17:49:41,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-01-31 17:49:41,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:41,568 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:41,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:49:41,568 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:41,568 INFO L85 PathProgramCache]: Analyzing trace with hash 704655507, now seen corresponding path program 72 times [2022-01-31 17:49:41,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:41,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880008129] [2022-01-31 17:49:41,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:41,570 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:41,570 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:41,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:41,578 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:43,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:43,276 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:43,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880008129] [2022-01-31 17:49:43,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1880008129] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:43,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:43,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 17:49:43,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690066927] [2022-01-31 17:49:43,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:43,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 17:49:43,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:43,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 17:49:43,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:49:43,277 INFO L87 Difference]: Start difference. First operand 457 states and 605 transitions. Second operand has 76 states, 76 states have (on average 3.026315789473684) internal successors, (230), 75 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:46,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:46,214 INFO L93 Difference]: Finished difference Result 701 states and 930 transitions. [2022-01-31 17:49:46,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 17:49:46,214 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.026315789473684) internal successors, (230), 75 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 447 [2022-01-31 17:49:46,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:46,216 INFO L225 Difference]: With dead ends: 701 [2022-01-31 17:49:46,216 INFO L226 Difference]: Without dead ends: 467 [2022-01-31 17:49:46,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:49:46,217 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1986 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1988 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:46,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1988 Valid, 64 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:49:46,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-01-31 17:49:46,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 463. [2022-01-31 17:49:46,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 456 states have (on average 1.3289473684210527) internal successors, (606), 456 states have internal predecessors, (606), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:49:46,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 613 transitions. [2022-01-31 17:49:46,368 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 613 transitions. Word has length 447 [2022-01-31 17:49:46,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:46,368 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 613 transitions. [2022-01-31 17:49:46,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.026315789473684) internal successors, (230), 75 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:46,368 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 613 transitions. [2022-01-31 17:49:46,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2022-01-31 17:49:46,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:46,370 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:46,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:49:46,370 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:46,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:46,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1082496697, now seen corresponding path program 73 times [2022-01-31 17:49:46,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:46,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989340634] [2022-01-31 17:49:46,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:46,372 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:46,372 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:46,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:46,380 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:48,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:48,189 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:48,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989340634] [2022-01-31 17:49:48,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [989340634] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:48,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:48,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 17:49:48,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090972530] [2022-01-31 17:49:48,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:48,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 17:49:48,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:48,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 17:49:48,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:49:48,192 INFO L87 Difference]: Start difference. First operand 463 states and 613 transitions. Second operand has 77 states, 77 states have (on average 3.0259740259740258) internal successors, (233), 76 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:51,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:51,188 INFO L93 Difference]: Finished difference Result 710 states and 942 transitions. [2022-01-31 17:49:51,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 17:49:51,189 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.0259740259740258) internal successors, (233), 76 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 453 [2022-01-31 17:49:51,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:51,190 INFO L225 Difference]: With dead ends: 710 [2022-01-31 17:49:51,190 INFO L226 Difference]: Without dead ends: 473 [2022-01-31 17:49:51,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 17:49:51,191 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1934 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1936 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:51,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1936 Valid, 49 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:49:51,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-01-31 17:49:51,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 469. [2022-01-31 17:49:51,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 462 states have (on average 1.329004329004329) internal successors, (614), 462 states have internal predecessors, (614), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:49:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 621 transitions. [2022-01-31 17:49:51,319 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 621 transitions. Word has length 453 [2022-01-31 17:49:51,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:51,319 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 621 transitions. [2022-01-31 17:49:51,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.0259740259740258) internal successors, (233), 76 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:51,319 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 621 transitions. [2022-01-31 17:49:51,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2022-01-31 17:49:51,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:51,321 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:51,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:49:51,321 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:51,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:51,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1948352851, now seen corresponding path program 74 times [2022-01-31 17:49:51,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:51,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781002990] [2022-01-31 17:49:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:51,323 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:51,324 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:51,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:51,332 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:53,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:53,218 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:53,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781002990] [2022-01-31 17:49:53,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [781002990] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:53,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:53,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 17:49:53,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706264523] [2022-01-31 17:49:53,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:53,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 17:49:53,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:53,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 17:49:53,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:49:53,220 INFO L87 Difference]: Start difference. First operand 469 states and 621 transitions. Second operand has 78 states, 78 states have (on average 3.0256410256410255) internal successors, (236), 77 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:56,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:56,321 INFO L93 Difference]: Finished difference Result 719 states and 954 transitions. [2022-01-31 17:49:56,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 17:49:56,321 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.0256410256410255) internal successors, (236), 77 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 459 [2022-01-31 17:49:56,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:56,322 INFO L225 Difference]: With dead ends: 719 [2022-01-31 17:49:56,322 INFO L226 Difference]: Without dead ends: 479 [2022-01-31 17:49:56,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:49:56,324 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1762 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1764 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:56,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1764 Valid, 59 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:49:56,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-31 17:49:56,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 475. [2022-01-31 17:49:56,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 468 states have (on average 1.329059829059829) internal successors, (622), 468 states have internal predecessors, (622), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:49:56,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 629 transitions. [2022-01-31 17:49:56,459 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 629 transitions. Word has length 459 [2022-01-31 17:49:56,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:56,459 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 629 transitions. [2022-01-31 17:49:56,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.0256410256410255) internal successors, (236), 77 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:56,459 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 629 transitions. [2022-01-31 17:49:56,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2022-01-31 17:49:56,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:56,461 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:56,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:49:56,461 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:56,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:56,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1681605369, now seen corresponding path program 75 times [2022-01-31 17:49:56,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:56,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232143087] [2022-01-31 17:49:56,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:56,463 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:56,463 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:56,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:56,471 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:58,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:58,291 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:58,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232143087] [2022-01-31 17:49:58,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1232143087] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:58,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:58,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 17:49:58,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899572082] [2022-01-31 17:49:58,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:58,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 17:49:58,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:58,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 17:49:58,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:49:58,293 INFO L87 Difference]: Start difference. First operand 475 states and 629 transitions. Second operand has 79 states, 79 states have (on average 3.0253164556962027) internal successors, (239), 78 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:01,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:01,439 INFO L93 Difference]: Finished difference Result 728 states and 966 transitions. [2022-01-31 17:50:01,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:50:01,440 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.0253164556962027) internal successors, (239), 78 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 465 [2022-01-31 17:50:01,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:01,441 INFO L225 Difference]: With dead ends: 728 [2022-01-31 17:50:01,441 INFO L226 Difference]: Without dead ends: 485 [2022-01-31 17:50:01,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:50:01,443 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1698 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1700 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:01,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1700 Valid, 59 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:50:01,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-01-31 17:50:01,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 481. [2022-01-31 17:50:01,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 474 states have (on average 1.3291139240506329) internal successors, (630), 474 states have internal predecessors, (630), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:50:01,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 637 transitions. [2022-01-31 17:50:01,572 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 637 transitions. Word has length 465 [2022-01-31 17:50:01,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:01,572 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 637 transitions. [2022-01-31 17:50:01,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.0253164556962027) internal successors, (239), 78 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:01,572 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 637 transitions. [2022-01-31 17:50:01,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2022-01-31 17:50:01,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:01,574 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:01,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:50:01,574 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:01,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:01,574 INFO L85 PathProgramCache]: Analyzing trace with hash 41902611, now seen corresponding path program 76 times [2022-01-31 17:50:01,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:01,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869172743] [2022-01-31 17:50:01,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:01,576 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:01,576 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:01,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:01,584 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:03,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:03,534 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:03,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869172743] [2022-01-31 17:50:03,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1869172743] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:03,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:03,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 17:50:03,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57998763] [2022-01-31 17:50:03,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:03,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 17:50:03,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:03,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 17:50:03,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:50:03,536 INFO L87 Difference]: Start difference. First operand 481 states and 637 transitions. Second operand has 80 states, 80 states have (on average 3.025) internal successors, (242), 79 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:06,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:06,802 INFO L93 Difference]: Finished difference Result 737 states and 978 transitions. [2022-01-31 17:50:06,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 17:50:06,802 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.025) internal successors, (242), 79 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 471 [2022-01-31 17:50:06,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:06,804 INFO L225 Difference]: With dead ends: 737 [2022-01-31 17:50:06,804 INFO L226 Difference]: Without dead ends: 491 [2022-01-31 17:50:06,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:50:06,805 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1702 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:06,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1704 Valid, 69 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:50:06,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-01-31 17:50:06,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 487. [2022-01-31 17:50:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 480 states have (on average 1.3291666666666666) internal successors, (638), 480 states have internal predecessors, (638), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:50:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 645 transitions. [2022-01-31 17:50:06,940 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 645 transitions. Word has length 471 [2022-01-31 17:50:06,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:06,940 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 645 transitions. [2022-01-31 17:50:06,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.025) internal successors, (242), 79 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:06,941 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 645 transitions. [2022-01-31 17:50:06,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2022-01-31 17:50:06,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:06,951 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:06,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:50:06,951 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:06,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:06,951 INFO L85 PathProgramCache]: Analyzing trace with hash -708649159, now seen corresponding path program 77 times [2022-01-31 17:50:06,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:06,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9786003] [2022-01-31 17:50:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:06,953 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:06,953 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:06,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:06,962 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:08,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:08,836 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:08,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9786003] [2022-01-31 17:50:08,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [9786003] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:08,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:08,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 17:50:08,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113165957] [2022-01-31 17:50:08,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:08,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 17:50:08,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:08,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 17:50:08,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:50:08,838 INFO L87 Difference]: Start difference. First operand 487 states and 645 transitions. Second operand has 81 states, 81 states have (on average 3.0246913580246915) internal successors, (245), 80 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:12,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:12,140 INFO L93 Difference]: Finished difference Result 746 states and 990 transitions. [2022-01-31 17:50:12,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 17:50:12,141 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.0246913580246915) internal successors, (245), 80 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 477 [2022-01-31 17:50:12,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:12,142 INFO L225 Difference]: With dead ends: 746 [2022-01-31 17:50:12,142 INFO L226 Difference]: Without dead ends: 497 [2022-01-31 17:50:12,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 17:50:12,144 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1862 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1864 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:12,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1864 Valid, 44 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:50:12,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-01-31 17:50:12,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 493. [2022-01-31 17:50:12,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 486 states have (on average 1.3292181069958848) internal successors, (646), 486 states have internal predecessors, (646), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:50:12,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 653 transitions. [2022-01-31 17:50:12,293 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 653 transitions. Word has length 477 [2022-01-31 17:50:12,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:12,293 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 653 transitions. [2022-01-31 17:50:12,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.0246913580246915) internal successors, (245), 80 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:12,294 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 653 transitions. [2022-01-31 17:50:12,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-01-31 17:50:12,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:12,296 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:12,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:50:12,296 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:12,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:12,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1212011219, now seen corresponding path program 78 times [2022-01-31 17:50:12,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:12,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134799217] [2022-01-31 17:50:12,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:12,298 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:12,298 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:12,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:12,308 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:14,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:14,299 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:14,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134799217] [2022-01-31 17:50:14,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2134799217] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:14,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:14,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 17:50:14,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355158092] [2022-01-31 17:50:14,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:14,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 17:50:14,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:14,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 17:50:14,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:50:14,302 INFO L87 Difference]: Start difference. First operand 493 states and 653 transitions. Second operand has 82 states, 82 states have (on average 3.024390243902439) internal successors, (248), 81 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:18,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:18,003 INFO L93 Difference]: Finished difference Result 755 states and 1002 transitions. [2022-01-31 17:50:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 17:50:18,004 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.024390243902439) internal successors, (248), 81 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 483 [2022-01-31 17:50:18,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:18,005 INFO L225 Difference]: With dead ends: 755 [2022-01-31 17:50:18,005 INFO L226 Difference]: Without dead ends: 503 [2022-01-31 17:50:18,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:50:18,007 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1898 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1900 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:18,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1900 Valid, 49 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:50:18,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-01-31 17:50:18,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 499. [2022-01-31 17:50:18,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 492 states have (on average 1.329268292682927) internal successors, (654), 492 states have internal predecessors, (654), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:50:18,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 661 transitions. [2022-01-31 17:50:18,146 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 661 transitions. Word has length 483 [2022-01-31 17:50:18,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:18,146 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 661 transitions. [2022-01-31 17:50:18,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.024390243902439) internal successors, (248), 81 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:18,146 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 661 transitions. [2022-01-31 17:50:18,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2022-01-31 17:50:18,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:18,148 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:18,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:50:18,148 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:18,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:18,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1095210119, now seen corresponding path program 79 times [2022-01-31 17:50:18,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:18,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934190435] [2022-01-31 17:50:18,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:18,150 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:18,150 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:18,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:18,161 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:20,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:20,160 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:20,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934190435] [2022-01-31 17:50:20,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1934190435] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:20,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:20,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 17:50:20,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578686794] [2022-01-31 17:50:20,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:20,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 17:50:20,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:20,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 17:50:20,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:50:20,162 INFO L87 Difference]: Start difference. First operand 499 states and 661 transitions. Second operand has 83 states, 83 states have (on average 3.0240963855421685) internal successors, (251), 82 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:23,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:23,660 INFO L93 Difference]: Finished difference Result 764 states and 1014 transitions. [2022-01-31 17:50:23,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 17:50:23,661 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.0240963855421685) internal successors, (251), 82 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 489 [2022-01-31 17:50:23,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:23,662 INFO L225 Difference]: With dead ends: 764 [2022-01-31 17:50:23,662 INFO L226 Difference]: Without dead ends: 509 [2022-01-31 17:50:23,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:50:23,663 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1946 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1948 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:23,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1948 Valid, 54 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:50:23,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-31 17:50:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 505. [2022-01-31 17:50:23,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 498 states have (on average 1.3293172690763053) internal successors, (662), 498 states have internal predecessors, (662), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:50:23,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 669 transitions. [2022-01-31 17:50:23,807 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 669 transitions. Word has length 489 [2022-01-31 17:50:23,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:23,807 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 669 transitions. [2022-01-31 17:50:23,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.0240963855421685) internal successors, (251), 82 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:23,807 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 669 transitions. [2022-01-31 17:50:23,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2022-01-31 17:50:23,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:23,809 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:23,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:50:23,809 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:23,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:23,809 INFO L85 PathProgramCache]: Analyzing trace with hash 360764307, now seen corresponding path program 80 times [2022-01-31 17:50:23,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:23,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731090315] [2022-01-31 17:50:23,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:23,811 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:23,811 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:23,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:23,836 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:25,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:25,910 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 17:50:25,911 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:25,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731090315] [2022-01-31 17:50:25,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1731090315] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:25,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:25,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 17:50:25,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703540290] [2022-01-31 17:50:25,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:25,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 17:50:25,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:25,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 17:50:25,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 17:50:25,913 INFO L87 Difference]: Start difference. First operand 505 states and 669 transitions. Second operand has 84 states, 84 states have (on average 3.0238095238095237) internal successors, (254), 83 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:29,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:29,529 INFO L93 Difference]: Finished difference Result 773 states and 1026 transitions. [2022-01-31 17:50:29,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 17:50:29,529 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.0238095238095237) internal successors, (254), 83 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 495 [2022-01-31 17:50:29,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:29,530 INFO L225 Difference]: With dead ends: 773 [2022-01-31 17:50:29,530 INFO L226 Difference]: Without dead ends: 515 [2022-01-31 17:50:29,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 17:50:29,532 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1782 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1784 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:29,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1784 Valid, 54 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:50:29,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-01-31 17:50:29,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 511. [2022-01-31 17:50:29,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 504 states have (on average 1.3293650793650793) internal successors, (670), 504 states have internal predecessors, (670), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:50:29,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 677 transitions. [2022-01-31 17:50:29,678 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 677 transitions. Word has length 495 [2022-01-31 17:50:29,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:29,678 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 677 transitions. [2022-01-31 17:50:29,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.0238095238095237) internal successors, (254), 83 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:29,678 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 677 transitions. [2022-01-31 17:50:29,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2022-01-31 17:50:29,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:29,680 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:29,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:50:29,680 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:29,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:29,681 INFO L85 PathProgramCache]: Analyzing trace with hash -340269127, now seen corresponding path program 81 times [2022-01-31 17:50:29,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:29,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965193014] [2022-01-31 17:50:29,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:29,682 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:29,682 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:29,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:29,692 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:31,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:31,810 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:31,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965193014] [2022-01-31 17:50:31,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1965193014] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:31,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:31,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 17:50:31,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636612283] [2022-01-31 17:50:31,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:31,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 17:50:31,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:31,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 17:50:31,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:50:31,812 INFO L87 Difference]: Start difference. First operand 511 states and 677 transitions. Second operand has 85 states, 85 states have (on average 3.023529411764706) internal successors, (257), 84 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:35,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:35,511 INFO L93 Difference]: Finished difference Result 782 states and 1038 transitions. [2022-01-31 17:50:35,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 17:50:35,512 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.023529411764706) internal successors, (257), 84 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 501 [2022-01-31 17:50:35,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:35,513 INFO L225 Difference]: With dead ends: 782 [2022-01-31 17:50:35,513 INFO L226 Difference]: Without dead ends: 521 [2022-01-31 17:50:35,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 17:50:35,515 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2018 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2020 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:35,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2020 Valid, 59 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:50:35,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-01-31 17:50:35,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 517. [2022-01-31 17:50:35,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 510 states have (on average 1.3294117647058823) internal successors, (678), 510 states have internal predecessors, (678), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:50:35,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 685 transitions. [2022-01-31 17:50:35,679 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 685 transitions. Word has length 501 [2022-01-31 17:50:35,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:35,680 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 685 transitions. [2022-01-31 17:50:35,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.023529411764706) internal successors, (257), 84 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:35,680 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 685 transitions. [2022-01-31 17:50:35,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2022-01-31 17:50:35,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:35,682 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:35,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 17:50:35,682 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:35,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:35,682 INFO L85 PathProgramCache]: Analyzing trace with hash -680762285, now seen corresponding path program 82 times [2022-01-31 17:50:35,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:35,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176503354] [2022-01-31 17:50:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:35,684 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:35,684 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:35,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:35,695 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:37,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:37,961 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:37,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176503354] [2022-01-31 17:50:37,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1176503354] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:37,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:37,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 17:50:37,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678480462] [2022-01-31 17:50:37,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:37,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 17:50:37,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:37,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 17:50:37,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 17:50:37,964 INFO L87 Difference]: Start difference. First operand 517 states and 685 transitions. Second operand has 86 states, 86 states have (on average 3.0232558139534884) internal successors, (260), 85 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:41,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:41,831 INFO L93 Difference]: Finished difference Result 791 states and 1050 transitions. [2022-01-31 17:50:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 17:50:41,831 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.0232558139534884) internal successors, (260), 85 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 507 [2022-01-31 17:50:41,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:41,833 INFO L225 Difference]: With dead ends: 791 [2022-01-31 17:50:41,833 INFO L226 Difference]: Without dead ends: 527 [2022-01-31 17:50:41,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 17:50:41,834 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2050 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2052 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:41,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2052 Valid, 44 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:50:41,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-01-31 17:50:41,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 523. [2022-01-31 17:50:41,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 516 states have (on average 1.3294573643410852) internal successors, (686), 516 states have internal predecessors, (686), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:50:41,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 693 transitions. [2022-01-31 17:50:41,989 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 693 transitions. Word has length 507 [2022-01-31 17:50:41,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:41,989 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 693 transitions. [2022-01-31 17:50:41,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.0232558139534884) internal successors, (260), 85 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 693 transitions. [2022-01-31 17:50:41,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2022-01-31 17:50:41,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:41,992 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:41,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 17:50:41,992 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:41,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:41,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1940040711, now seen corresponding path program 83 times [2022-01-31 17:50:41,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:41,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740710837] [2022-01-31 17:50:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:41,994 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:41,994 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:41,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:42,004 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:44,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:44,245 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 17:50:44,245 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:44,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740710837] [2022-01-31 17:50:44,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [740710837] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:44,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:44,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 17:50:44,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303390343] [2022-01-31 17:50:44,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:44,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 17:50:44,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:44,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 17:50:44,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:50:44,248 INFO L87 Difference]: Start difference. First operand 523 states and 693 transitions. Second operand has 87 states, 87 states have (on average 3.0229885057471266) internal successors, (263), 86 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:48,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:48,167 INFO L93 Difference]: Finished difference Result 800 states and 1062 transitions. [2022-01-31 17:50:48,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 17:50:48,168 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.0229885057471266) internal successors, (263), 86 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 513 [2022-01-31 17:50:48,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:48,169 INFO L225 Difference]: With dead ends: 800 [2022-01-31 17:50:48,169 INFO L226 Difference]: Without dead ends: 533 [2022-01-31 17:50:48,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 17:50:48,171 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1814 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1816 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:48,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1816 Valid, 54 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:50:48,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-01-31 17:50:48,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 529. [2022-01-31 17:50:48,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 522 states have (on average 1.3295019157088122) internal successors, (694), 522 states have internal predecessors, (694), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:50:48,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 701 transitions. [2022-01-31 17:50:48,328 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 701 transitions. Word has length 513 [2022-01-31 17:50:48,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:48,328 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 701 transitions. [2022-01-31 17:50:48,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.0229885057471266) internal successors, (263), 86 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:48,329 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 701 transitions. [2022-01-31 17:50:48,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-01-31 17:50:48,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:48,331 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:48,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 17:50:48,331 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:48,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:48,331 INFO L85 PathProgramCache]: Analyzing trace with hash -668695277, now seen corresponding path program 84 times [2022-01-31 17:50:48,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:48,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936777677] [2022-01-31 17:50:48,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:48,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:48,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:48,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:48,343 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:50,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:50,616 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:50,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936777677] [2022-01-31 17:50:50,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1936777677] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:50,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:50,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 17:50:50,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043142676] [2022-01-31 17:50:50,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:50,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 17:50:50,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:50,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 17:50:50,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 17:50:50,620 INFO L87 Difference]: Start difference. First operand 529 states and 701 transitions. Second operand has 88 states, 88 states have (on average 3.022727272727273) internal successors, (266), 87 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:54,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:54,590 INFO L93 Difference]: Finished difference Result 809 states and 1074 transitions. [2022-01-31 17:50:54,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 17:50:54,590 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.022727272727273) internal successors, (266), 87 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 519 [2022-01-31 17:50:54,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:54,592 INFO L225 Difference]: With dead ends: 809 [2022-01-31 17:50:54,592 INFO L226 Difference]: Without dead ends: 539 [2022-01-31 17:50:54,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 17:50:54,593 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2106 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2108 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:54,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2108 Valid, 59 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:50:54,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-01-31 17:50:54,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 535. [2022-01-31 17:50:54,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 528 states have (on average 1.3295454545454546) internal successors, (702), 528 states have internal predecessors, (702), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:50:54,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 709 transitions. [2022-01-31 17:50:54,755 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 709 transitions. Word has length 519 [2022-01-31 17:50:54,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:54,755 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 709 transitions. [2022-01-31 17:50:54,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.022727272727273) internal successors, (266), 87 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:54,755 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 709 transitions. [2022-01-31 17:50:54,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2022-01-31 17:50:54,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:54,757 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:54,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 17:50:54,758 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:54,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:54,758 INFO L85 PathProgramCache]: Analyzing trace with hash -213602247, now seen corresponding path program 85 times [2022-01-31 17:50:54,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:54,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168241236] [2022-01-31 17:50:54,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:54,760 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:54,760 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:54,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:54,770 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:54,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:57,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:57,093 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:57,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168241236] [2022-01-31 17:50:57,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1168241236] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:57,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:57,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 17:50:57,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975510593] [2022-01-31 17:50:57,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:57,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 17:50:57,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:57,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 17:50:57,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:50:57,095 INFO L87 Difference]: Start difference. First operand 535 states and 709 transitions. Second operand has 89 states, 89 states have (on average 3.0224719101123596) internal successors, (269), 88 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:01,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:01,144 INFO L93 Difference]: Finished difference Result 818 states and 1086 transitions. [2022-01-31 17:51:01,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 17:51:01,145 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.0224719101123596) internal successors, (269), 88 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 525 [2022-01-31 17:51:01,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:01,146 INFO L225 Difference]: With dead ends: 818 [2022-01-31 17:51:01,146 INFO L226 Difference]: Without dead ends: 545 [2022-01-31 17:51:01,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 17:51:01,148 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2770 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2772 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:01,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2772 Valid, 39 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:51:01,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-01-31 17:51:01,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 541. [2022-01-31 17:51:01,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 534 states have (on average 1.3295880149812733) internal successors, (710), 534 states have internal predecessors, (710), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:51:01,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 717 transitions. [2022-01-31 17:51:01,314 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 717 transitions. Word has length 525 [2022-01-31 17:51:01,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:01,314 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 717 transitions. [2022-01-31 17:51:01,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.0224719101123596) internal successors, (269), 88 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:01,314 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 717 transitions. [2022-01-31 17:51:01,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2022-01-31 17:51:01,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:01,316 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:01,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 17:51:01,317 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:01,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:01,317 INFO L85 PathProgramCache]: Analyzing trace with hash 2127377875, now seen corresponding path program 86 times [2022-01-31 17:51:01,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:01,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037112129] [2022-01-31 17:51:01,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:01,319 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:01,319 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:01,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:01,329 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:03,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:03,728 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:03,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037112129] [2022-01-31 17:51:03,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1037112129] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:03,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:03,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 17:51:03,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103448809] [2022-01-31 17:51:03,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:03,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 17:51:03,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:03,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 17:51:03,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 17:51:03,732 INFO L87 Difference]: Start difference. First operand 541 states and 717 transitions. Second operand has 90 states, 90 states have (on average 3.022222222222222) internal successors, (272), 89 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:07,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:07,806 INFO L93 Difference]: Finished difference Result 827 states and 1098 transitions. [2022-01-31 17:51:07,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 17:51:07,807 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.022222222222222) internal successors, (272), 89 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 531 [2022-01-31 17:51:07,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:07,808 INFO L225 Difference]: With dead ends: 827 [2022-01-31 17:51:07,808 INFO L226 Difference]: Without dead ends: 551 [2022-01-31 17:51:07,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 17:51:07,810 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2082 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2084 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:07,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2084 Valid, 49 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:51:07,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-01-31 17:51:07,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 547. [2022-01-31 17:51:07,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 540 states have (on average 1.3296296296296297) internal successors, (718), 540 states have internal predecessors, (718), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:51:07,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 725 transitions. [2022-01-31 17:51:07,981 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 725 transitions. Word has length 531 [2022-01-31 17:51:07,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:07,981 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 725 transitions. [2022-01-31 17:51:07,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.022222222222222) internal successors, (272), 89 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:07,981 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 725 transitions. [2022-01-31 17:51:07,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2022-01-31 17:51:07,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:07,983 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:07,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 17:51:07,984 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:07,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:07,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1443495033, now seen corresponding path program 87 times [2022-01-31 17:51:07,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:07,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193013259] [2022-01-31 17:51:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:07,986 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:07,986 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:07,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:08,002 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:10,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:10,382 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:10,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193013259] [2022-01-31 17:51:10,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [193013259] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:10,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:10,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 17:51:10,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027211377] [2022-01-31 17:51:10,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:10,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 17:51:10,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:10,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 17:51:10,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:51:10,385 INFO L87 Difference]: Start difference. First operand 547 states and 725 transitions. Second operand has 91 states, 91 states have (on average 3.021978021978022) internal successors, (275), 90 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:14,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:14,726 INFO L93 Difference]: Finished difference Result 836 states and 1110 transitions. [2022-01-31 17:51:14,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 17:51:14,726 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.021978021978022) internal successors, (275), 90 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 537 [2022-01-31 17:51:14,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:14,728 INFO L225 Difference]: With dead ends: 836 [2022-01-31 17:51:14,728 INFO L226 Difference]: Without dead ends: 557 [2022-01-31 17:51:14,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 17:51:14,730 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2478 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2480 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:14,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2480 Valid, 44 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:51:14,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-31 17:51:14,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 553. [2022-01-31 17:51:14,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 546 states have (on average 1.3296703296703296) internal successors, (726), 546 states have internal predecessors, (726), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:51:14,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 733 transitions. [2022-01-31 17:51:14,925 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 733 transitions. Word has length 537 [2022-01-31 17:51:14,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:14,925 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 733 transitions. [2022-01-31 17:51:14,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.021978021978022) internal successors, (275), 90 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:14,925 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 733 transitions. [2022-01-31 17:51:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2022-01-31 17:51:14,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:14,928 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:14,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 17:51:14,928 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:14,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:14,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1886751085, now seen corresponding path program 88 times [2022-01-31 17:51:14,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:14,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729033423] [2022-01-31 17:51:14,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:14,930 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:14,930 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:14,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:14,941 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:17,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:17,475 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:17,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729033423] [2022-01-31 17:51:17,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1729033423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:17,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:17,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 17:51:17,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668385238] [2022-01-31 17:51:17,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:17,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 17:51:17,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:17,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 17:51:17,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 17:51:17,477 INFO L87 Difference]: Start difference. First operand 553 states and 733 transitions. Second operand has 92 states, 92 states have (on average 3.0217391304347827) internal successors, (278), 91 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:21,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:21,903 INFO L93 Difference]: Finished difference Result 845 states and 1122 transitions. [2022-01-31 17:51:21,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 17:51:21,904 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.0217391304347827) internal successors, (278), 91 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 543 [2022-01-31 17:51:21,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:21,905 INFO L225 Difference]: With dead ends: 845 [2022-01-31 17:51:21,905 INFO L226 Difference]: Without dead ends: 563 [2022-01-31 17:51:21,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 17:51:21,907 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1970 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1972 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:21,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1972 Valid, 74 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:51:21,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-01-31 17:51:22,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 559. [2022-01-31 17:51:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 552 states have (on average 1.3297101449275361) internal successors, (734), 552 states have internal predecessors, (734), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:51:22,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 741 transitions. [2022-01-31 17:51:22,084 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 741 transitions. Word has length 543 [2022-01-31 17:51:22,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:22,085 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 741 transitions. [2022-01-31 17:51:22,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.0217391304347827) internal successors, (278), 91 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:22,085 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 741 transitions. [2022-01-31 17:51:22,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2022-01-31 17:51:22,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:22,087 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:22,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 17:51:22,087 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:22,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:22,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1924581191, now seen corresponding path program 89 times [2022-01-31 17:51:22,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:22,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021822136] [2022-01-31 17:51:22,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:22,089 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:22,089 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:22,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:22,101 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:24,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:24,633 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 17:51:24,633 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:24,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021822136] [2022-01-31 17:51:24,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2021822136] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:24,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:24,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 17:51:24,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170762690] [2022-01-31 17:51:24,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:24,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 17:51:24,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:24,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 17:51:24,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:51:24,636 INFO L87 Difference]: Start difference. First operand 559 states and 741 transitions. Second operand has 93 states, 93 states have (on average 3.021505376344086) internal successors, (281), 92 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:29,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:29,078 INFO L93 Difference]: Finished difference Result 854 states and 1134 transitions. [2022-01-31 17:51:29,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 17:51:29,078 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.021505376344086) internal successors, (281), 92 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 549 [2022-01-31 17:51:29,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:29,080 INFO L225 Difference]: With dead ends: 854 [2022-01-31 17:51:29,080 INFO L226 Difference]: Without dead ends: 569 [2022-01-31 17:51:29,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 17:51:29,082 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1982 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1984 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:29,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1984 Valid, 54 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:51:29,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-01-31 17:51:29,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 565. [2022-01-31 17:51:29,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 558 states have (on average 1.3297491039426523) internal successors, (742), 558 states have internal predecessors, (742), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:51:29,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 749 transitions. [2022-01-31 17:51:29,283 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 749 transitions. Word has length 549 [2022-01-31 17:51:29,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:29,283 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 749 transitions. [2022-01-31 17:51:29,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.021505376344086) internal successors, (281), 92 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:29,284 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 749 transitions. [2022-01-31 17:51:29,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2022-01-31 17:51:29,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:29,286 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:29,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 17:51:29,286 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:29,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:29,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1803568979, now seen corresponding path program 90 times [2022-01-31 17:51:29,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:29,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135149114] [2022-01-31 17:51:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:29,288 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:29,288 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:29,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:29,301 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:31,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:31,861 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:31,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135149114] [2022-01-31 17:51:31,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [135149114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:31,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:31,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 17:51:31,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627076584] [2022-01-31 17:51:31,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:31,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 17:51:31,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:31,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 17:51:31,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 17:51:31,863 INFO L87 Difference]: Start difference. First operand 565 states and 749 transitions. Second operand has 94 states, 94 states have (on average 3.021276595744681) internal successors, (284), 93 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:36,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:36,519 INFO L93 Difference]: Finished difference Result 863 states and 1146 transitions. [2022-01-31 17:51:36,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 17:51:36,519 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.021276595744681) internal successors, (284), 93 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 555 [2022-01-31 17:51:36,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:36,521 INFO L225 Difference]: With dead ends: 863 [2022-01-31 17:51:36,521 INFO L226 Difference]: Without dead ends: 575 [2022-01-31 17:51:36,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 17:51:36,523 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2246 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 562 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2248 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 562 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:36,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2248 Valid, 69 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [562 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:51:36,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-01-31 17:51:36,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 571. [2022-01-31 17:51:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 564 states have (on average 1.3297872340425532) internal successors, (750), 564 states have internal predecessors, (750), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:51:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 757 transitions. [2022-01-31 17:51:36,722 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 757 transitions. Word has length 555 [2022-01-31 17:51:36,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:36,722 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 757 transitions. [2022-01-31 17:51:36,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.021276595744681) internal successors, (284), 93 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:36,722 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 757 transitions. [2022-01-31 17:51:36,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2022-01-31 17:51:36,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:36,725 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:36,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 17:51:36,725 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:36,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:36,725 INFO L85 PathProgramCache]: Analyzing trace with hash -727816967, now seen corresponding path program 91 times [2022-01-31 17:51:36,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:36,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416469516] [2022-01-31 17:51:36,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:36,727 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:36,727 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:36,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:36,740 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:39,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:39,348 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:39,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416469516] [2022-01-31 17:51:39,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1416469516] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:39,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:39,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 17:51:39,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44799058] [2022-01-31 17:51:39,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:39,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 17:51:39,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:39,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 17:51:39,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:51:39,351 INFO L87 Difference]: Start difference. First operand 571 states and 757 transitions. Second operand has 95 states, 95 states have (on average 3.0210526315789474) internal successors, (287), 94 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:44,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:44,010 INFO L93 Difference]: Finished difference Result 872 states and 1158 transitions. [2022-01-31 17:51:44,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 17:51:44,011 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.0210526315789474) internal successors, (287), 94 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 561 [2022-01-31 17:51:44,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:44,012 INFO L225 Difference]: With dead ends: 872 [2022-01-31 17:51:44,012 INFO L226 Difference]: Without dead ends: 581 [2022-01-31 17:51:44,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 17:51:44,013 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2218 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 554 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2220 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 554 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:44,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2220 Valid, 49 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [554 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:51:44,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-01-31 17:51:44,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 577. [2022-01-31 17:51:44,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 570 states have (on average 1.3298245614035087) internal successors, (758), 570 states have internal predecessors, (758), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:51:44,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 765 transitions. [2022-01-31 17:51:44,204 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 765 transitions. Word has length 561 [2022-01-31 17:51:44,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:44,205 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 765 transitions. [2022-01-31 17:51:44,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.0210526315789474) internal successors, (287), 94 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:44,205 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 765 transitions. [2022-01-31 17:51:44,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2022-01-31 17:51:44,207 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:44,207 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:44,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 17:51:44,208 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:44,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:44,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1355982867, now seen corresponding path program 92 times [2022-01-31 17:51:44,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:44,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905120269] [2022-01-31 17:51:44,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:44,210 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:44,210 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:44,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:44,222 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:46,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:46,935 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:46,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905120269] [2022-01-31 17:51:46,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1905120269] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:46,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:46,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 17:51:46,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096989437] [2022-01-31 17:51:46,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:46,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 17:51:46,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:46,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 17:51:46,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 17:51:46,938 INFO L87 Difference]: Start difference. First operand 577 states and 765 transitions. Second operand has 96 states, 96 states have (on average 3.0208333333333335) internal successors, (290), 95 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:51,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:51,567 INFO L93 Difference]: Finished difference Result 881 states and 1170 transitions. [2022-01-31 17:51:51,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 17:51:51,568 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.0208333333333335) internal successors, (290), 95 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 567 [2022-01-31 17:51:51,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:51,568 INFO L225 Difference]: With dead ends: 881 [2022-01-31 17:51:51,568 INFO L226 Difference]: Without dead ends: 587 [2022-01-31 17:51:51,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 17:51:51,570 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2062 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2064 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:51,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2064 Valid, 59 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:51:51,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-01-31 17:51:51,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 583. [2022-01-31 17:51:51,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 576 states have (on average 1.3298611111111112) internal successors, (766), 576 states have internal predecessors, (766), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:51:51,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 773 transitions. [2022-01-31 17:51:51,786 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 773 transitions. Word has length 567 [2022-01-31 17:51:51,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:51,786 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 773 transitions. [2022-01-31 17:51:51,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.0208333333333335) internal successors, (290), 95 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:51,786 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 773 transitions. [2022-01-31 17:51:51,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2022-01-31 17:51:51,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:51,789 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:51,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 17:51:51,789 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:51,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:51,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1968864967, now seen corresponding path program 93 times [2022-01-31 17:51:51,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:51,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995875937] [2022-01-31 17:51:51,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:51,791 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:51,791 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:51,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:51,804 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:54,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:54,526 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:54,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995875937] [2022-01-31 17:51:54,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1995875937] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:54,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:54,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 17:51:54,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854387122] [2022-01-31 17:51:54,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:54,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 17:51:54,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:54,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 17:51:54,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:51:54,530 INFO L87 Difference]: Start difference. First operand 583 states and 773 transitions. Second operand has 97 states, 97 states have (on average 3.020618556701031) internal successors, (293), 96 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:59,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:59,402 INFO L93 Difference]: Finished difference Result 890 states and 1182 transitions. [2022-01-31 17:51:59,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 17:51:59,403 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.020618556701031) internal successors, (293), 96 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 573 [2022-01-31 17:51:59,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:59,403 INFO L225 Difference]: With dead ends: 890 [2022-01-31 17:51:59,404 INFO L226 Difference]: Without dead ends: 593 [2022-01-31 17:51:59,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 17:51:59,405 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2402 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 605 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2404 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 605 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:59,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2404 Valid, 59 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [605 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:51:59,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-01-31 17:51:59,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 589. [2022-01-31 17:51:59,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 582 states have (on average 1.3298969072164948) internal successors, (774), 582 states have internal predecessors, (774), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:51:59,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 781 transitions. [2022-01-31 17:51:59,619 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 781 transitions. Word has length 573 [2022-01-31 17:51:59,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:59,620 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 781 transitions. [2022-01-31 17:51:59,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.020618556701031) internal successors, (293), 96 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:59,620 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 781 transitions. [2022-01-31 17:51:59,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2022-01-31 17:51:59,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:59,623 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:59,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 17:51:59,623 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:59,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:59,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1700423469, now seen corresponding path program 94 times [2022-01-31 17:51:59,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:59,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999216246] [2022-01-31 17:51:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:59,625 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:59,625 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:59,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:59,641 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:02,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:02,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:02,513 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:02,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999216246] [2022-01-31 17:52:02,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [999216246] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:02,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:02,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 17:52:02,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177009173] [2022-01-31 17:52:02,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:02,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 17:52:02,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:02,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 17:52:02,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 17:52:02,515 INFO L87 Difference]: Start difference. First operand 589 states and 781 transitions. Second operand has 98 states, 98 states have (on average 3.020408163265306) internal successors, (296), 97 states have internal predecessors, (296), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:07,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:07,516 INFO L93 Difference]: Finished difference Result 899 states and 1194 transitions. [2022-01-31 17:52:07,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 17:52:07,517 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.020408163265306) internal successors, (296), 97 states have internal predecessors, (296), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 579 [2022-01-31 17:52:07,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:07,518 INFO L225 Difference]: With dead ends: 899 [2022-01-31 17:52:07,518 INFO L226 Difference]: Without dead ends: 599 [2022-01-31 17:52:07,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 17:52:07,519 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2302 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2304 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:07,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2304 Valid, 44 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:52:07,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-31 17:52:07,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 595. [2022-01-31 17:52:07,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 588 states have (on average 1.3299319727891157) internal successors, (782), 588 states have internal predecessors, (782), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:52:07,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 789 transitions. [2022-01-31 17:52:07,725 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 789 transitions. Word has length 579 [2022-01-31 17:52:07,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:07,725 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 789 transitions. [2022-01-31 17:52:07,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.020408163265306) internal successors, (296), 97 states have internal predecessors, (296), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:07,725 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 789 transitions. [2022-01-31 17:52:07,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2022-01-31 17:52:07,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:07,728 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:07,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 17:52:07,728 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:07,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:07,728 INFO L85 PathProgramCache]: Analyzing trace with hash -252015239, now seen corresponding path program 95 times [2022-01-31 17:52:07,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:07,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388171788] [2022-01-31 17:52:07,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:07,730 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:07,730 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:07,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:07,744 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:10,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:10,588 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:10,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388171788] [2022-01-31 17:52:10,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1388171788] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:10,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:10,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 17:52:10,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726694247] [2022-01-31 17:52:10,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:10,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 17:52:10,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:10,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 17:52:10,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:52:10,590 INFO L87 Difference]: Start difference. First operand 595 states and 789 transitions. Second operand has 99 states, 99 states have (on average 3.0202020202020203) internal successors, (299), 98 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:15,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:15,735 INFO L93 Difference]: Finished difference Result 908 states and 1206 transitions. [2022-01-31 17:52:15,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 17:52:15,735 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.0202020202020203) internal successors, (299), 98 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 585 [2022-01-31 17:52:15,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:15,736 INFO L225 Difference]: With dead ends: 908 [2022-01-31 17:52:15,736 INFO L226 Difference]: Without dead ends: 605 [2022-01-31 17:52:15,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 17:52:15,738 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2218 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2220 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:15,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2220 Valid, 49 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:52:15,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-01-31 17:52:15,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 601. [2022-01-31 17:52:15,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 594 states have (on average 1.32996632996633) internal successors, (790), 594 states have internal predecessors, (790), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:52:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 797 transitions. [2022-01-31 17:52:15,966 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 797 transitions. Word has length 585 [2022-01-31 17:52:15,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:15,966 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 797 transitions. [2022-01-31 17:52:15,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.0202020202020203) internal successors, (299), 98 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:15,966 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 797 transitions. [2022-01-31 17:52:15,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2022-01-31 17:52:15,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:15,969 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:15,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 17:52:15,969 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:15,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:15,969 INFO L85 PathProgramCache]: Analyzing trace with hash 18684307, now seen corresponding path program 96 times [2022-01-31 17:52:15,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:15,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492226472] [2022-01-31 17:52:15,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:15,971 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:15,971 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:15,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:15,985 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:18,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:18,965 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:18,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492226472] [2022-01-31 17:52:18,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [492226472] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:18,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:18,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 17:52:18,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361633748] [2022-01-31 17:52:18,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:18,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 17:52:18,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:18,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 17:52:18,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 17:52:18,968 INFO L87 Difference]: Start difference. First operand 601 states and 797 transitions. Second operand has 100 states, 100 states have (on average 3.02) internal successors, (302), 99 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:24,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:24,180 INFO L93 Difference]: Finished difference Result 917 states and 1218 transitions. [2022-01-31 17:52:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 17:52:24,181 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.02) internal successors, (302), 99 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 591 [2022-01-31 17:52:24,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:24,181 INFO L225 Difference]: With dead ends: 917 [2022-01-31 17:52:24,182 INFO L226 Difference]: Without dead ends: 611 [2022-01-31 17:52:24,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 17:52:24,184 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2362 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2364 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:24,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2364 Valid, 54 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:52:24,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-01-31 17:52:24,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 607. [2022-01-31 17:52:24,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 600 states have (on average 1.33) internal successors, (798), 600 states have internal predecessors, (798), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:52:24,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 805 transitions. [2022-01-31 17:52:24,414 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 805 transitions. Word has length 591 [2022-01-31 17:52:24,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:24,414 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 805 transitions. [2022-01-31 17:52:24,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.02) internal successors, (302), 99 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:24,415 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 805 transitions. [2022-01-31 17:52:24,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2022-01-31 17:52:24,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:24,418 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:24,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 17:52:24,418 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:24,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:24,418 INFO L85 PathProgramCache]: Analyzing trace with hash -331773511, now seen corresponding path program 97 times [2022-01-31 17:52:24,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:24,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519347215] [2022-01-31 17:52:24,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:24,420 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:24,420 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:24,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:24,435 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:27,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:27,372 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:27,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519347215] [2022-01-31 17:52:27,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1519347215] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:27,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:27,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 17:52:27,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645778770] [2022-01-31 17:52:27,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:27,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 17:52:27,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:27,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 17:52:27,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:52:27,375 INFO L87 Difference]: Start difference. First operand 607 states and 805 transitions. Second operand has 101 states, 101 states have (on average 3.01980198019802) internal successors, (305), 100 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:32,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:32,767 INFO L93 Difference]: Finished difference Result 926 states and 1230 transitions. [2022-01-31 17:52:32,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 17:52:32,767 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.01980198019802) internal successors, (305), 100 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 597 [2022-01-31 17:52:32,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:32,768 INFO L225 Difference]: With dead ends: 926 [2022-01-31 17:52:32,768 INFO L226 Difference]: Without dead ends: 617 [2022-01-31 17:52:32,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 17:52:32,770 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2434 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2436 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:32,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2436 Valid, 49 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:52:32,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-01-31 17:52:32,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 613. [2022-01-31 17:52:32,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 606 states have (on average 1.33003300330033) internal successors, (806), 606 states have internal predecessors, (806), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:52:32,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 813 transitions. [2022-01-31 17:52:32,998 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 813 transitions. Word has length 597 [2022-01-31 17:52:32,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:32,998 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 813 transitions. [2022-01-31 17:52:32,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.01980198019802) internal successors, (305), 100 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:32,998 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 813 transitions. [2022-01-31 17:52:33,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2022-01-31 17:52:33,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:33,001 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:33,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 17:52:33,001 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:33,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:33,002 INFO L85 PathProgramCache]: Analyzing trace with hash -648205741, now seen corresponding path program 98 times [2022-01-31 17:52:33,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:33,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639033767] [2022-01-31 17:52:33,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:33,003 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:33,003 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:33,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:33,017 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:36,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:36,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:36,044 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:36,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639033767] [2022-01-31 17:52:36,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1639033767] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:36,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:36,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 17:52:36,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754617732] [2022-01-31 17:52:36,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:36,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 17:52:36,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:36,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 17:52:36,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 17:52:36,046 INFO L87 Difference]: Start difference. First operand 613 states and 813 transitions. Second operand has 102 states, 102 states have (on average 3.019607843137255) internal successors, (308), 101 states have internal predecessors, (308), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:41,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:41,977 INFO L93 Difference]: Finished difference Result 935 states and 1242 transitions. [2022-01-31 17:52:41,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 17:52:41,977 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.019607843137255) internal successors, (308), 101 states have internal predecessors, (308), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 603 [2022-01-31 17:52:41,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:41,978 INFO L225 Difference]: With dead ends: 935 [2022-01-31 17:52:41,978 INFO L226 Difference]: Without dead ends: 623 [2022-01-31 17:52:41,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 17:52:41,980 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2242 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 562 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2244 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 562 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:41,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2244 Valid, 59 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [562 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:52:41,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-01-31 17:52:42,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 619. [2022-01-31 17:52:42,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 612 states have (on average 1.3300653594771241) internal successors, (814), 612 states have internal predecessors, (814), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:52:42,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 821 transitions. [2022-01-31 17:52:42,223 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 821 transitions. Word has length 603 [2022-01-31 17:52:42,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:42,224 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 821 transitions. [2022-01-31 17:52:42,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.019607843137255) internal successors, (308), 101 states have internal predecessors, (308), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:42,224 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 821 transitions. [2022-01-31 17:52:42,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2022-01-31 17:52:42,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:42,227 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:42,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 17:52:42,227 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:42,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:42,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1006733831, now seen corresponding path program 99 times [2022-01-31 17:52:42,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:42,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252589545] [2022-01-31 17:52:42,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:42,229 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:42,229 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:42,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:42,243 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:45,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:45,315 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:45,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252589545] [2022-01-31 17:52:45,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1252589545] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:45,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:45,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 17:52:45,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100042119] [2022-01-31 17:52:45,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:45,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 17:52:45,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:45,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 17:52:45,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:52:45,319 INFO L87 Difference]: Start difference. First operand 619 states and 821 transitions. Second operand has 103 states, 103 states have (on average 3.0194174757281553) internal successors, (311), 102 states have internal predecessors, (311), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:50,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:50,896 INFO L93 Difference]: Finished difference Result 944 states and 1254 transitions. [2022-01-31 17:52:50,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 17:52:50,896 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.0194174757281553) internal successors, (311), 102 states have internal predecessors, (311), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 609 [2022-01-31 17:52:50,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:50,897 INFO L225 Difference]: With dead ends: 944 [2022-01-31 17:52:50,897 INFO L226 Difference]: Without dead ends: 629 [2022-01-31 17:52:50,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 17:52:50,899 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2410 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2412 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:50,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2412 Valid, 64 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:52:50,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-01-31 17:52:51,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 625. [2022-01-31 17:52:51,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 618 states have (on average 1.3300970873786409) internal successors, (822), 618 states have internal predecessors, (822), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:52:51,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 829 transitions. [2022-01-31 17:52:51,145 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 829 transitions. Word has length 609 [2022-01-31 17:52:51,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:51,146 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 829 transitions. [2022-01-31 17:52:51,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.0194174757281553) internal successors, (311), 102 states have internal predecessors, (311), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:51,146 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 829 transitions. [2022-01-31 17:52:51,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2022-01-31 17:52:51,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:51,149 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:51,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 17:52:51,149 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:51,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:51,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1435093779, now seen corresponding path program 100 times [2022-01-31 17:52:51,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:51,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026984531] [2022-01-31 17:52:51,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:51,151 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:51,151 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:51,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:51,165 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:54,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:54,306 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:54,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026984531] [2022-01-31 17:52:54,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2026984531] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:54,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:54,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 17:52:54,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067547268] [2022-01-31 17:52:54,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:54,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 17:52:54,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:54,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 17:52:54,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 17:52:54,309 INFO L87 Difference]: Start difference. First operand 625 states and 829 transitions. Second operand has 104 states, 104 states have (on average 3.019230769230769) internal successors, (314), 103 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:00,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:00,109 INFO L93 Difference]: Finished difference Result 953 states and 1266 transitions. [2022-01-31 17:53:00,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 17:53:00,110 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.019230769230769) internal successors, (314), 103 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 615 [2022-01-31 17:53:00,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:00,111 INFO L225 Difference]: With dead ends: 953 [2022-01-31 17:53:00,111 INFO L226 Difference]: Without dead ends: 635 [2022-01-31 17:53:00,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 17:53:00,113 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2234 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2236 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:00,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2236 Valid, 74 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:53:00,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-01-31 17:53:00,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 631. [2022-01-31 17:53:00,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 624 states have (on average 1.330128205128205) internal successors, (830), 624 states have internal predecessors, (830), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:53:00,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 837 transitions. [2022-01-31 17:53:00,355 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 837 transitions. Word has length 615 [2022-01-31 17:53:00,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:00,356 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 837 transitions. [2022-01-31 17:53:00,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.019230769230769) internal successors, (314), 103 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:00,356 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 837 transitions. [2022-01-31 17:53:00,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2022-01-31 17:53:00,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:00,359 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:00,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 17:53:00,359 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:00,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:00,359 INFO L85 PathProgramCache]: Analyzing trace with hash -488287687, now seen corresponding path program 101 times [2022-01-31 17:53:00,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:00,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874956554] [2022-01-31 17:53:00,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:00,361 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:00,361 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:00,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:00,375 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:03,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:03,668 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:03,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874956554] [2022-01-31 17:53:03,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [874956554] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:03,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:03,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 17:53:03,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035651453] [2022-01-31 17:53:03,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:03,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 17:53:03,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:03,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 17:53:03,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:53:03,672 INFO L87 Difference]: Start difference. First operand 631 states and 837 transitions. Second operand has 105 states, 105 states have (on average 3.019047619047619) internal successors, (317), 104 states have internal predecessors, (317), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:09,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:09,419 INFO L93 Difference]: Finished difference Result 962 states and 1278 transitions. [2022-01-31 17:53:09,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 17:53:09,419 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 3.019047619047619) internal successors, (317), 104 states have internal predecessors, (317), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 621 [2022-01-31 17:53:09,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:09,420 INFO L225 Difference]: With dead ends: 962 [2022-01-31 17:53:09,420 INFO L226 Difference]: Without dead ends: 641 [2022-01-31 17:53:09,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 17:53:09,423 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2326 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2328 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:09,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2328 Valid, 59 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:53:09,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-01-31 17:53:09,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 637. [2022-01-31 17:53:09,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 630 states have (on average 1.33015873015873) internal successors, (838), 630 states have internal predecessors, (838), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:53:09,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 845 transitions. [2022-01-31 17:53:09,688 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 845 transitions. Word has length 621 [2022-01-31 17:53:09,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:09,688 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 845 transitions. [2022-01-31 17:53:09,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 3.019047619047619) internal successors, (317), 104 states have internal predecessors, (317), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:09,688 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 845 transitions. [2022-01-31 17:53:09,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2022-01-31 17:53:09,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:09,691 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:09,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 17:53:09,691 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:09,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:09,692 INFO L85 PathProgramCache]: Analyzing trace with hash -993592365, now seen corresponding path program 102 times [2022-01-31 17:53:09,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:09,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908007896] [2022-01-31 17:53:09,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:09,694 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:09,694 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:09,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:09,721 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:12,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:12,945 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 17:53:12,945 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:12,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908007896] [2022-01-31 17:53:12,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1908007896] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:12,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:12,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 17:53:12,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340435555] [2022-01-31 17:53:12,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:12,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 17:53:12,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:12,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 17:53:12,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 17:53:12,948 INFO L87 Difference]: Start difference. First operand 637 states and 845 transitions. Second operand has 106 states, 106 states have (on average 3.018867924528302) internal successors, (320), 105 states have internal predecessors, (320), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:19,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:19,049 INFO L93 Difference]: Finished difference Result 971 states and 1290 transitions. [2022-01-31 17:53:19,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 17:53:19,049 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 3.018867924528302) internal successors, (320), 105 states have internal predecessors, (320), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 627 [2022-01-31 17:53:19,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:19,050 INFO L225 Difference]: With dead ends: 971 [2022-01-31 17:53:19,051 INFO L226 Difference]: Without dead ends: 647 [2022-01-31 17:53:19,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 17:53:19,053 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2434 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2436 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:19,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2436 Valid, 74 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [612 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:53:19,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-01-31 17:53:19,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 643. [2022-01-31 17:53:19,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 636 states have (on average 1.330188679245283) internal successors, (846), 636 states have internal predecessors, (846), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:53:19,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 853 transitions. [2022-01-31 17:53:19,309 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 853 transitions. Word has length 627 [2022-01-31 17:53:19,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:19,309 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 853 transitions. [2022-01-31 17:53:19,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 3.018867924528302) internal successors, (320), 105 states have internal predecessors, (320), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:19,309 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 853 transitions. [2022-01-31 17:53:19,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 634 [2022-01-31 17:53:19,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:19,312 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:19,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 17:53:19,312 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:19,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:19,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1769333127, now seen corresponding path program 103 times [2022-01-31 17:53:19,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:19,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191974273] [2022-01-31 17:53:19,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:19,314 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:19,314 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:19,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:19,329 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:22,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:22,636 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:22,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191974273] [2022-01-31 17:53:22,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [191974273] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:22,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:22,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 17:53:22,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198589564] [2022-01-31 17:53:22,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:22,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 17:53:22,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:22,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 17:53:22,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:53:22,639 INFO L87 Difference]: Start difference. First operand 643 states and 853 transitions. Second operand has 107 states, 107 states have (on average 3.0186915887850465) internal successors, (323), 106 states have internal predecessors, (323), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:28,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:28,719 INFO L93 Difference]: Finished difference Result 980 states and 1302 transitions. [2022-01-31 17:53:28,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 17:53:28,719 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.0186915887850465) internal successors, (323), 106 states have internal predecessors, (323), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 633 [2022-01-31 17:53:28,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:28,720 INFO L225 Difference]: With dead ends: 980 [2022-01-31 17:53:28,720 INFO L226 Difference]: Without dead ends: 653 [2022-01-31 17:53:28,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 17:53:28,722 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2442 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2444 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:28,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2444 Valid, 54 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [612 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:53:28,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-01-31 17:53:28,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 649. [2022-01-31 17:53:28,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 642 states have (on average 1.3302180685358256) internal successors, (854), 642 states have internal predecessors, (854), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:53:28,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 861 transitions. [2022-01-31 17:53:28,972 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 861 transitions. Word has length 633 [2022-01-31 17:53:28,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:28,972 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 861 transitions. [2022-01-31 17:53:28,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.0186915887850465) internal successors, (323), 106 states have internal predecessors, (323), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:28,973 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 861 transitions. [2022-01-31 17:53:28,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2022-01-31 17:53:28,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:28,975 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:28,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 17:53:28,976 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:28,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:28,976 INFO L85 PathProgramCache]: Analyzing trace with hash -751256429, now seen corresponding path program 104 times [2022-01-31 17:53:28,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:28,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839938631] [2022-01-31 17:53:28,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:28,977 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:28,977 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:28,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:28,992 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:32,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:32,437 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:32,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839938631] [2022-01-31 17:53:32,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [839938631] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:32,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:32,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 17:53:32,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395086966] [2022-01-31 17:53:32,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:32,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 17:53:32,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:32,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 17:53:32,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 17:53:32,440 INFO L87 Difference]: Start difference. First operand 649 states and 861 transitions. Second operand has 108 states, 108 states have (on average 3.0185185185185186) internal successors, (326), 107 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:38,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:38,586 INFO L93 Difference]: Finished difference Result 989 states and 1314 transitions. [2022-01-31 17:53:38,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 17:53:38,586 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 3.0185185185185186) internal successors, (326), 107 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 639 [2022-01-31 17:53:38,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:38,587 INFO L225 Difference]: With dead ends: 989 [2022-01-31 17:53:38,587 INFO L226 Difference]: Without dead ends: 659 [2022-01-31 17:53:38,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 17:53:38,589 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2718 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 682 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2720 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 682 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:38,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2720 Valid, 49 Invalid, 1611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [682 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:53:38,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-01-31 17:53:38,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 655. [2022-01-31 17:53:38,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 648 states have (on average 1.3302469135802468) internal successors, (862), 648 states have internal predecessors, (862), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:53:38,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 869 transitions. [2022-01-31 17:53:38,852 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 869 transitions. Word has length 639 [2022-01-31 17:53:38,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:38,853 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 869 transitions. [2022-01-31 17:53:38,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 3.0185185185185186) internal successors, (326), 107 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:38,853 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 869 transitions. [2022-01-31 17:53:38,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2022-01-31 17:53:38,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:38,856 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:38,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 17:53:38,856 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:38,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:38,856 INFO L85 PathProgramCache]: Analyzing trace with hash -813114695, now seen corresponding path program 105 times [2022-01-31 17:53:38,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:38,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866671777] [2022-01-31 17:53:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:38,857 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:38,857 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:38,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:38,877 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:42,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:42,304 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:42,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866671777] [2022-01-31 17:53:42,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1866671777] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:42,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:42,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 17:53:42,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172489227] [2022-01-31 17:53:42,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:42,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 17:53:42,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:42,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 17:53:42,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:53:42,307 INFO L87 Difference]: Start difference. First operand 655 states and 869 transitions. Second operand has 109 states, 109 states have (on average 3.018348623853211) internal successors, (329), 108 states have internal predecessors, (329), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:48,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:48,772 INFO L93 Difference]: Finished difference Result 998 states and 1326 transitions. [2022-01-31 17:53:48,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 17:53:48,772 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 3.018348623853211) internal successors, (329), 108 states have internal predecessors, (329), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 645 [2022-01-31 17:53:48,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:48,774 INFO L225 Difference]: With dead ends: 998 [2022-01-31 17:53:48,774 INFO L226 Difference]: Without dead ends: 665 [2022-01-31 17:53:48,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 17:53:48,776 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2294 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2296 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:48,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2296 Valid, 69 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:53:48,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-31 17:53:49,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 661. [2022-01-31 17:53:49,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 654 states have (on average 1.3302752293577982) internal successors, (870), 654 states have internal predecessors, (870), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:53:49,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 877 transitions. [2022-01-31 17:53:49,034 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 877 transitions. Word has length 645 [2022-01-31 17:53:49,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:49,034 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 877 transitions. [2022-01-31 17:53:49,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 3.018348623853211) internal successors, (329), 108 states have internal predecessors, (329), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:49,034 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 877 transitions. [2022-01-31 17:53:49,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2022-01-31 17:53:49,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:49,037 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:49,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 17:53:49,037 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:49,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:49,037 INFO L85 PathProgramCache]: Analyzing trace with hash -905769645, now seen corresponding path program 106 times [2022-01-31 17:53:49,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:49,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338425795] [2022-01-31 17:53:49,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:49,039 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:49,039 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:49,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:49,067 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:52,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:52,527 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:52,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338425795] [2022-01-31 17:53:52,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1338425795] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:52,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:52,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 17:53:52,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027674411] [2022-01-31 17:53:52,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:52,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 17:53:52,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:52,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 17:53:52,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 17:53:52,530 INFO L87 Difference]: Start difference. First operand 661 states and 877 transitions. Second operand has 110 states, 110 states have (on average 3.018181818181818) internal successors, (332), 109 states have internal predecessors, (332), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:59,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:59,136 INFO L93 Difference]: Finished difference Result 1007 states and 1338 transitions. [2022-01-31 17:53:59,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 17:53:59,136 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.018181818181818) internal successors, (332), 109 states have internal predecessors, (332), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 651 [2022-01-31 17:53:59,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:59,137 INFO L225 Difference]: With dead ends: 1007 [2022-01-31 17:53:59,137 INFO L226 Difference]: Without dead ends: 671 [2022-01-31 17:53:59,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 17:53:59,140 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 3378 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 848 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3380 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 848 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:59,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3380 Valid, 44 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [848 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:53:59,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-01-31 17:53:59,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 667. [2022-01-31 17:53:59,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 660 states have (on average 1.3303030303030303) internal successors, (878), 660 states have internal predecessors, (878), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:53:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 885 transitions. [2022-01-31 17:53:59,414 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 885 transitions. Word has length 651 [2022-01-31 17:53:59,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:59,414 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 885 transitions. [2022-01-31 17:53:59,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.018181818181818) internal successors, (332), 109 states have internal predecessors, (332), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:59,414 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 885 transitions. [2022-01-31 17:53:59,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2022-01-31 17:53:59,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:59,417 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:59,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 17:53:59,417 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:59,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:59,417 INFO L85 PathProgramCache]: Analyzing trace with hash -511867143, now seen corresponding path program 107 times [2022-01-31 17:53:59,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:59,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901018317] [2022-01-31 17:53:59,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:59,419 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:59,419 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:59,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:59,435 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:03,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:03,004 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:03,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901018317] [2022-01-31 17:54:03,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1901018317] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:03,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:03,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 17:54:03,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707835141] [2022-01-31 17:54:03,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:03,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 17:54:03,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:03,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 17:54:03,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:54:03,007 INFO L87 Difference]: Start difference. First operand 667 states and 885 transitions. Second operand has 111 states, 111 states have (on average 3.018018018018018) internal successors, (335), 110 states have internal predecessors, (335), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:09,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:09,631 INFO L93 Difference]: Finished difference Result 1016 states and 1350 transitions. [2022-01-31 17:54:09,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 17:54:09,631 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 3.018018018018018) internal successors, (335), 110 states have internal predecessors, (335), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 657 [2022-01-31 17:54:09,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:09,632 INFO L225 Difference]: With dead ends: 1016 [2022-01-31 17:54:09,632 INFO L226 Difference]: Without dead ends: 677 [2022-01-31 17:54:09,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 17:54:09,634 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2606 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2608 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 1724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:09,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2608 Valid, 79 Invalid, 1724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:54:09,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-01-31 17:54:09,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 673. [2022-01-31 17:54:09,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 666 states have (on average 1.3303303303303304) internal successors, (886), 666 states have internal predecessors, (886), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:54:09,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 893 transitions. [2022-01-31 17:54:09,910 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 893 transitions. Word has length 657 [2022-01-31 17:54:09,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:09,911 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 893 transitions. [2022-01-31 17:54:09,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 3.018018018018018) internal successors, (335), 110 states have internal predecessors, (335), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:09,911 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 893 transitions. [2022-01-31 17:54:09,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2022-01-31 17:54:09,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:09,914 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:09,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 17:54:09,914 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:09,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:09,914 INFO L85 PathProgramCache]: Analyzing trace with hash -817238509, now seen corresponding path program 108 times [2022-01-31 17:54:09,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:09,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990731628] [2022-01-31 17:54:09,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:09,916 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:09,916 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:09,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:09,933 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:13,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:13,543 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:13,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990731628] [2022-01-31 17:54:13,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [990731628] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:13,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:13,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 17:54:13,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056691211] [2022-01-31 17:54:13,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:13,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 17:54:13,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:13,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 17:54:13,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 17:54:13,546 INFO L87 Difference]: Start difference. First operand 673 states and 893 transitions. Second operand has 112 states, 112 states have (on average 3.017857142857143) internal successors, (338), 111 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:20,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:20,263 INFO L93 Difference]: Finished difference Result 1025 states and 1362 transitions. [2022-01-31 17:54:20,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 17:54:20,264 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 3.017857142857143) internal successors, (338), 111 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 663 [2022-01-31 17:54:20,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:20,265 INFO L225 Difference]: With dead ends: 1025 [2022-01-31 17:54:20,265 INFO L226 Difference]: Without dead ends: 683 [2022-01-31 17:54:20,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 17:54:20,281 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2522 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2524 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 633 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:20,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2524 Valid, 54 Invalid, 1614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [633 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:54:20,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-01-31 17:54:20,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 679. [2022-01-31 17:54:20,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 672 states have (on average 1.3303571428571428) internal successors, (894), 672 states have internal predecessors, (894), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:54:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 901 transitions. [2022-01-31 17:54:20,583 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 901 transitions. Word has length 663 [2022-01-31 17:54:20,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:20,583 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 901 transitions. [2022-01-31 17:54:20,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 3.017857142857143) internal successors, (338), 111 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:20,583 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 901 transitions. [2022-01-31 17:54:20,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2022-01-31 17:54:20,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:20,586 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:20,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 17:54:20,586 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:20,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:20,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1124344633, now seen corresponding path program 109 times [2022-01-31 17:54:20,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:20,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625660788] [2022-01-31 17:54:20,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:20,595 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:20,595 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:20,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:20,615 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:24,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:24,277 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:24,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625660788] [2022-01-31 17:54:24,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1625660788] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:24,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:24,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 17:54:24,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150240575] [2022-01-31 17:54:24,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:24,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 17:54:24,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:24,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 17:54:24,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:54:24,279 INFO L87 Difference]: Start difference. First operand 679 states and 901 transitions. Second operand has 113 states, 113 states have (on average 3.017699115044248) internal successors, (341), 112 states have internal predecessors, (341), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:31,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:31,042 INFO L93 Difference]: Finished difference Result 1034 states and 1374 transitions. [2022-01-31 17:54:31,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 17:54:31,043 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 3.017699115044248) internal successors, (341), 112 states have internal predecessors, (341), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 669 [2022-01-31 17:54:31,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:31,044 INFO L225 Difference]: With dead ends: 1034 [2022-01-31 17:54:31,044 INFO L226 Difference]: Without dead ends: 689 [2022-01-31 17:54:31,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 17:54:31,046 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2490 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2492 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:31,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2492 Valid, 59 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:54:31,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-01-31 17:54:31,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 685. [2022-01-31 17:54:31,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 678 states have (on average 1.3303834808259587) internal successors, (902), 678 states have internal predecessors, (902), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:54:31,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 909 transitions. [2022-01-31 17:54:31,350 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 909 transitions. Word has length 669 [2022-01-31 17:54:31,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:31,350 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 909 transitions. [2022-01-31 17:54:31,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 3.017699115044248) internal successors, (341), 112 states have internal predecessors, (341), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:31,351 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 909 transitions. [2022-01-31 17:54:31,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2022-01-31 17:54:31,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:31,354 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:31,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 17:54:31,354 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:31,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:31,354 INFO L85 PathProgramCache]: Analyzing trace with hash 640769747, now seen corresponding path program 110 times [2022-01-31 17:54:31,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:31,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097856718] [2022-01-31 17:54:31,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:31,360 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:31,360 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:31,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:31,378 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:35,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:35,133 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:35,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097856718] [2022-01-31 17:54:35,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1097856718] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:35,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:35,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 17:54:35,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386387404] [2022-01-31 17:54:35,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:35,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 17:54:35,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:35,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 17:54:35,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 17:54:35,137 INFO L87 Difference]: Start difference. First operand 685 states and 909 transitions. Second operand has 114 states, 114 states have (on average 3.017543859649123) internal successors, (344), 113 states have internal predecessors, (344), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:42,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:42,167 INFO L93 Difference]: Finished difference Result 1043 states and 1386 transitions. [2022-01-31 17:54:42,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 17:54:42,168 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 3.017543859649123) internal successors, (344), 113 states have internal predecessors, (344), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 675 [2022-01-31 17:54:42,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:42,169 INFO L225 Difference]: With dead ends: 1043 [2022-01-31 17:54:42,169 INFO L226 Difference]: Without dead ends: 695 [2022-01-31 17:54:42,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 17:54:42,172 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2662 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 667 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2664 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 667 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:42,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2664 Valid, 59 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [667 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:54:42,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-01-31 17:54:42,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 691. [2022-01-31 17:54:42,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 684 states have (on average 1.3304093567251463) internal successors, (910), 684 states have internal predecessors, (910), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:54:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 917 transitions. [2022-01-31 17:54:42,471 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 917 transitions. Word has length 675 [2022-01-31 17:54:42,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:42,471 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 917 transitions. [2022-01-31 17:54:42,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 3.017543859649123) internal successors, (344), 113 states have internal predecessors, (344), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:42,471 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 917 transitions. [2022-01-31 17:54:42,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 682 [2022-01-31 17:54:42,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:42,475 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:42,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 17:54:42,475 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:42,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:42,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1303949177, now seen corresponding path program 111 times [2022-01-31 17:54:42,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:42,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316217207] [2022-01-31 17:54:42,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:42,477 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:42,477 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:42,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:42,504 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:46,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:46,453 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:46,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316217207] [2022-01-31 17:54:46,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [316217207] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:46,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:46,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 17:54:46,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154277318] [2022-01-31 17:54:46,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:46,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 17:54:46,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:46,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 17:54:46,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:54:46,456 INFO L87 Difference]: Start difference. First operand 691 states and 917 transitions. Second operand has 115 states, 115 states have (on average 3.017391304347826) internal successors, (347), 114 states have internal predecessors, (347), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:53,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:53,605 INFO L93 Difference]: Finished difference Result 1052 states and 1398 transitions. [2022-01-31 17:54:53,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 17:54:53,605 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 3.017391304347826) internal successors, (347), 114 states have internal predecessors, (347), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 681 [2022-01-31 17:54:53,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:53,606 INFO L225 Difference]: With dead ends: 1052 [2022-01-31 17:54:53,606 INFO L226 Difference]: Without dead ends: 701 [2022-01-31 17:54:53,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 17:54:53,610 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2918 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 736 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2920 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 736 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:53,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2920 Valid, 54 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [736 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:54:53,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-01-31 17:54:53,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 697. [2022-01-31 17:54:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 690 states have (on average 1.3304347826086957) internal successors, (918), 690 states have internal predecessors, (918), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:54:53,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 925 transitions. [2022-01-31 17:54:53,902 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 925 transitions. Word has length 681 [2022-01-31 17:54:53,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:53,902 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 925 transitions. [2022-01-31 17:54:53,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 3.017391304347826) internal successors, (347), 114 states have internal predecessors, (347), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:53,902 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 925 transitions. [2022-01-31 17:54:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2022-01-31 17:54:53,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:53,906 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:53,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 17:54:53,906 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:53,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:53,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1860001683, now seen corresponding path program 112 times [2022-01-31 17:54:53,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:53,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60383503] [2022-01-31 17:54:53,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:53,907 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:53,907 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:53,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:53,927 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:57,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:57,810 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:57,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60383503] [2022-01-31 17:54:57,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [60383503] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:57,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:57,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 17:54:57,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902901519] [2022-01-31 17:54:57,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:57,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 17:54:57,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:57,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 17:54:57,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 17:54:57,814 INFO L87 Difference]: Start difference. First operand 697 states and 925 transitions. Second operand has 116 states, 116 states have (on average 3.0172413793103448) internal successors, (350), 115 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:05,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:05,201 INFO L93 Difference]: Finished difference Result 1061 states and 1410 transitions. [2022-01-31 17:55:05,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 17:55:05,201 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.0172413793103448) internal successors, (350), 115 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 687 [2022-01-31 17:55:05,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:05,202 INFO L225 Difference]: With dead ends: 1061 [2022-01-31 17:55:05,202 INFO L226 Difference]: Without dead ends: 707 [2022-01-31 17:55:05,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 17:55:05,204 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2846 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 712 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2848 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 712 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:05,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2848 Valid, 59 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [712 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:55:05,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-01-31 17:55:05,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 703. [2022-01-31 17:55:05,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 696 states have (on average 1.3304597701149425) internal successors, (926), 696 states have internal predecessors, (926), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:55:05,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 933 transitions. [2022-01-31 17:55:05,507 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 933 transitions. Word has length 687 [2022-01-31 17:55:05,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:05,507 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 933 transitions. [2022-01-31 17:55:05,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.0172413793103448) internal successors, (350), 115 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:05,508 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 933 transitions. [2022-01-31 17:55:05,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2022-01-31 17:55:05,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:05,511 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:05,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 17:55:05,511 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:05,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:05,511 INFO L85 PathProgramCache]: Analyzing trace with hash -29938759, now seen corresponding path program 113 times [2022-01-31 17:55:05,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:05,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443908039] [2022-01-31 17:55:05,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:05,512 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:05,512 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:05,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:05,532 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:09,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:09,455 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:09,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443908039] [2022-01-31 17:55:09,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [443908039] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:09,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:09,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 17:55:09,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589901875] [2022-01-31 17:55:09,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:09,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 17:55:09,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:09,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 17:55:09,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:55:09,458 INFO L87 Difference]: Start difference. First operand 703 states and 933 transitions. Second operand has 117 states, 117 states have (on average 3.017094017094017) internal successors, (353), 116 states have internal predecessors, (353), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:16,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:16,910 INFO L93 Difference]: Finished difference Result 1070 states and 1422 transitions. [2022-01-31 17:55:16,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 17:55:16,910 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 3.017094017094017) internal successors, (353), 116 states have internal predecessors, (353), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 693 [2022-01-31 17:55:16,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:16,911 INFO L225 Difference]: With dead ends: 1070 [2022-01-31 17:55:16,912 INFO L226 Difference]: Without dead ends: 713 [2022-01-31 17:55:16,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 17:55:16,914 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 3054 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3056 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 765 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:16,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3056 Valid, 44 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [765 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:55:16,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-01-31 17:55:17,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 709. [2022-01-31 17:55:17,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 702 states have (on average 1.3304843304843306) internal successors, (934), 702 states have internal predecessors, (934), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:55:17,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 941 transitions. [2022-01-31 17:55:17,228 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 941 transitions. Word has length 693 [2022-01-31 17:55:17,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:17,229 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 941 transitions. [2022-01-31 17:55:17,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 3.017094017094017) internal successors, (353), 116 states have internal predecessors, (353), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:17,229 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 941 transitions. [2022-01-31 17:55:17,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2022-01-31 17:55:17,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:17,232 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:17,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 17:55:17,232 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:17,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:17,233 INFO L85 PathProgramCache]: Analyzing trace with hash -428740525, now seen corresponding path program 114 times [2022-01-31 17:55:17,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:17,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568706308] [2022-01-31 17:55:17,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:17,234 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:17,234 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:17,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:17,255 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:21,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:21,298 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:21,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568706308] [2022-01-31 17:55:21,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1568706308] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:21,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:21,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 17:55:21,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092042369] [2022-01-31 17:55:21,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:21,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 17:55:21,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:21,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 17:55:21,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 17:55:21,302 INFO L87 Difference]: Start difference. First operand 709 states and 941 transitions. Second operand has 118 states, 118 states have (on average 3.016949152542373) internal successors, (356), 117 states have internal predecessors, (356), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:28,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:28,918 INFO L93 Difference]: Finished difference Result 1079 states and 1434 transitions. [2022-01-31 17:55:28,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 17:55:28,918 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 3.016949152542373) internal successors, (356), 117 states have internal predecessors, (356), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 699 [2022-01-31 17:55:28,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:28,920 INFO L225 Difference]: With dead ends: 1079 [2022-01-31 17:55:28,920 INFO L226 Difference]: Without dead ends: 719 [2022-01-31 17:55:28,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 17:55:28,922 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2954 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 740 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2956 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 740 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:28,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2956 Valid, 59 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [740 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:55:28,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-01-31 17:55:29,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 715. [2022-01-31 17:55:29,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 708 states have (on average 1.3305084745762712) internal successors, (942), 708 states have internal predecessors, (942), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:55:29,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 949 transitions. [2022-01-31 17:55:29,241 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 949 transitions. Word has length 699 [2022-01-31 17:55:29,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:29,241 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 949 transitions. [2022-01-31 17:55:29,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 3.016949152542373) internal successors, (356), 117 states have internal predecessors, (356), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:29,241 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 949 transitions. [2022-01-31 17:55:29,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 706 [2022-01-31 17:55:29,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:29,244 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:29,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 17:55:29,245 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:29,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:29,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1273260039, now seen corresponding path program 115 times [2022-01-31 17:55:29,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:29,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382454821] [2022-01-31 17:55:29,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:29,246 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:29,246 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:29,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:29,266 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:33,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:33,346 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:33,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382454821] [2022-01-31 17:55:33,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [382454821] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:33,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:33,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 17:55:33,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253319871] [2022-01-31 17:55:33,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:33,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 17:55:33,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:33,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 17:55:33,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:55:33,350 INFO L87 Difference]: Start difference. First operand 715 states and 949 transitions. Second operand has 119 states, 119 states have (on average 3.0168067226890756) internal successors, (359), 118 states have internal predecessors, (359), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:41,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:41,008 INFO L93 Difference]: Finished difference Result 1088 states and 1446 transitions. [2022-01-31 17:55:41,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 17:55:41,009 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 3.0168067226890756) internal successors, (359), 118 states have internal predecessors, (359), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 705 [2022-01-31 17:55:41,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:41,010 INFO L225 Difference]: With dead ends: 1088 [2022-01-31 17:55:41,010 INFO L226 Difference]: Without dead ends: 725 [2022-01-31 17:55:41,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 17:55:41,012 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2978 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2980 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 748 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:41,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2980 Valid, 49 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [748 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:55:41,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-01-31 17:55:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 721. [2022-01-31 17:55:41,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 714 states have (on average 1.330532212885154) internal successors, (950), 714 states have internal predecessors, (950), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:55:41,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 957 transitions. [2022-01-31 17:55:41,337 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 957 transitions. Word has length 705 [2022-01-31 17:55:41,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:41,337 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 957 transitions. [2022-01-31 17:55:41,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 3.0168067226890756) internal successors, (359), 118 states have internal predecessors, (359), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:41,337 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 957 transitions. [2022-01-31 17:55:41,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2022-01-31 17:55:41,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:41,340 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 116, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:41,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 17:55:41,341 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:41,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:41,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1491922669, now seen corresponding path program 116 times [2022-01-31 17:55:41,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:41,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832906463] [2022-01-31 17:55:41,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:41,342 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:41,342 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:41,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:41,364 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:45,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:45,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:45,488 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:45,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832906463] [2022-01-31 17:55:45,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1832906463] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:45,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:45,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 17:55:45,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342273708] [2022-01-31 17:55:45,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:45,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 17:55:45,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:45,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 17:55:45,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 17:55:45,493 INFO L87 Difference]: Start difference. First operand 721 states and 957 transitions. Second operand has 120 states, 120 states have (on average 3.0166666666666666) internal successors, (362), 119 states have internal predecessors, (362), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:53,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:53,480 INFO L93 Difference]: Finished difference Result 1097 states and 1458 transitions. [2022-01-31 17:55:53,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 17:55:53,481 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 3.0166666666666666) internal successors, (362), 119 states have internal predecessors, (362), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 711 [2022-01-31 17:55:53,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:53,482 INFO L225 Difference]: With dead ends: 1097 [2022-01-31 17:55:53,482 INFO L226 Difference]: Without dead ends: 731 [2022-01-31 17:55:53,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 17:55:53,484 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 3062 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 767 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3064 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 767 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:53,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3064 Valid, 49 Invalid, 1792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [767 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:55:53,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-01-31 17:55:53,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 727. [2022-01-31 17:55:53,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 720 states have (on average 1.3305555555555555) internal successors, (958), 720 states have internal predecessors, (958), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:55:53,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 965 transitions. [2022-01-31 17:55:53,828 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 965 transitions. Word has length 711 [2022-01-31 17:55:53,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:53,829 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 965 transitions. [2022-01-31 17:55:53,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 3.0166666666666666) internal successors, (362), 119 states have internal predecessors, (362), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:53,829 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 965 transitions. [2022-01-31 17:55:53,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 718 [2022-01-31 17:55:53,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:53,832 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 117, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:53,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 17:55:53,832 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:53,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:53,833 INFO L85 PathProgramCache]: Analyzing trace with hash -234752967, now seen corresponding path program 117 times [2022-01-31 17:55:53,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:53,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822482850] [2022-01-31 17:55:53,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:53,834 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:53,834 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:53,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:53,857 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:54,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:58,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:58,052 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:58,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822482850] [2022-01-31 17:55:58,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [822482850] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:58,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:58,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 17:55:58,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888844291] [2022-01-31 17:55:58,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:58,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 17:55:58,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:58,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 17:55:58,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:55:58,061 INFO L87 Difference]: Start difference. First operand 727 states and 965 transitions. Second operand has 121 states, 121 states have (on average 3.0165289256198347) internal successors, (365), 120 states have internal predecessors, (365), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:06,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:06,093 INFO L93 Difference]: Finished difference Result 1106 states and 1470 transitions. [2022-01-31 17:56:06,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 17:56:06,093 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 3.0165289256198347) internal successors, (365), 120 states have internal predecessors, (365), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 717 [2022-01-31 17:56:06,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:06,094 INFO L225 Difference]: With dead ends: 1106 [2022-01-31 17:56:06,094 INFO L226 Difference]: Without dead ends: 737 [2022-01-31 17:56:06,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 17:56:06,097 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2994 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2996 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:06,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2996 Valid, 59 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:56:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-01-31 17:56:06,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 733. [2022-01-31 17:56:06,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 726 states have (on average 1.3305785123966942) internal successors, (966), 726 states have internal predecessors, (966), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:56:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 973 transitions. [2022-01-31 17:56:06,436 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 973 transitions. Word has length 717 [2022-01-31 17:56:06,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:06,436 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 973 transitions. [2022-01-31 17:56:06,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 3.0165289256198347) internal successors, (365), 120 states have internal predecessors, (365), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:06,436 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 973 transitions. [2022-01-31 17:56:06,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2022-01-31 17:56:06,440 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:06,440 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 118, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:06,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 17:56:06,440 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:06,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:06,440 INFO L85 PathProgramCache]: Analyzing trace with hash -404438573, now seen corresponding path program 118 times [2022-01-31 17:56:06,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:06,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711327074] [2022-01-31 17:56:06,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:06,442 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:06,442 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:06,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:06,463 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:10,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:10,781 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:10,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711327074] [2022-01-31 17:56:10,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1711327074] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:10,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:10,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 17:56:10,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520041018] [2022-01-31 17:56:10,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:10,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 17:56:10,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:10,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 17:56:10,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 17:56:10,785 INFO L87 Difference]: Start difference. First operand 733 states and 973 transitions. Second operand has 122 states, 122 states have (on average 3.0163934426229506) internal successors, (368), 121 states have internal predecessors, (368), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:19,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:19,287 INFO L93 Difference]: Finished difference Result 1115 states and 1482 transitions. [2022-01-31 17:56:19,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 17:56:19,288 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 3.0163934426229506) internal successors, (368), 121 states have internal predecessors, (368), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 723 [2022-01-31 17:56:19,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:19,289 INFO L225 Difference]: With dead ends: 1115 [2022-01-31 17:56:19,289 INFO L226 Difference]: Without dead ends: 743 [2022-01-31 17:56:19,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 17:56:19,291 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 3206 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 804 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3208 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 804 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:19,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3208 Valid, 49 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [804 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:56:19,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-01-31 17:56:19,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 739. [2022-01-31 17:56:19,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 732 states have (on average 1.330601092896175) internal successors, (974), 732 states have internal predecessors, (974), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:56:19,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 981 transitions. [2022-01-31 17:56:19,622 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 981 transitions. Word has length 723 [2022-01-31 17:56:19,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:19,622 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 981 transitions. [2022-01-31 17:56:19,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 3.0163934426229506) internal successors, (368), 121 states have internal predecessors, (368), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:19,622 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 981 transitions. [2022-01-31 17:56:19,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2022-01-31 17:56:19,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:19,626 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 119, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:19,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 17:56:19,626 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:19,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:19,626 INFO L85 PathProgramCache]: Analyzing trace with hash 495337593, now seen corresponding path program 119 times [2022-01-31 17:56:19,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:19,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995470351] [2022-01-31 17:56:19,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:19,628 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:19,628 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:19,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:19,649 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:24,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:24,071 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:24,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995470351] [2022-01-31 17:56:24,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1995470351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:24,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:24,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 17:56:24,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142508417] [2022-01-31 17:56:24,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:24,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 17:56:24,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:24,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 17:56:24,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:56:24,074 INFO L87 Difference]: Start difference. First operand 739 states and 981 transitions. Second operand has 123 states, 123 states have (on average 3.016260162601626) internal successors, (371), 122 states have internal predecessors, (371), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:32,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:32,608 INFO L93 Difference]: Finished difference Result 1124 states and 1494 transitions. [2022-01-31 17:56:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 17:56:32,608 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 3.016260162601626) internal successors, (371), 122 states have internal predecessors, (371), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 729 [2022-01-31 17:56:32,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:32,610 INFO L225 Difference]: With dead ends: 1124 [2022-01-31 17:56:32,610 INFO L226 Difference]: Without dead ends: 749 [2022-01-31 17:56:32,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 17:56:32,612 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2622 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 657 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2624 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 657 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:32,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2624 Valid, 69 Invalid, 1786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [657 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:56:32,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-31 17:56:32,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 745. [2022-01-31 17:56:32,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 738 states have (on average 1.3306233062330624) internal successors, (982), 738 states have internal predecessors, (982), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:56:32,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 989 transitions. [2022-01-31 17:56:32,945 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 989 transitions. Word has length 729 [2022-01-31 17:56:32,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:32,946 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 989 transitions. [2022-01-31 17:56:32,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 3.016260162601626) internal successors, (371), 122 states have internal predecessors, (371), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:32,946 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 989 transitions. [2022-01-31 17:56:32,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2022-01-31 17:56:32,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:32,949 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:32,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 17:56:32,949 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:32,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:32,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1024131731, now seen corresponding path program 120 times [2022-01-31 17:56:32,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:32,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167192519] [2022-01-31 17:56:32,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:32,951 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:32,951 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:32,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:32,974 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:37,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:37,420 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:37,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167192519] [2022-01-31 17:56:37,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [167192519] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:37,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:37,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 17:56:37,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318994519] [2022-01-31 17:56:37,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:37,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 17:56:37,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:37,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 17:56:37,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 17:56:37,423 INFO L87 Difference]: Start difference. First operand 745 states and 989 transitions. Second operand has 124 states, 124 states have (on average 3.0161290322580645) internal successors, (374), 123 states have internal predecessors, (374), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:46,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:46,328 INFO L93 Difference]: Finished difference Result 1133 states and 1506 transitions. [2022-01-31 17:56:46,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 17:56:46,328 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 3.0161290322580645) internal successors, (374), 123 states have internal predecessors, (374), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 735 [2022-01-31 17:56:46,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:46,344 INFO L225 Difference]: With dead ends: 1133 [2022-01-31 17:56:46,344 INFO L226 Difference]: Without dead ends: 755 [2022-01-31 17:56:46,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 17:56:46,347 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 3266 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 820 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3268 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 820 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:46,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3268 Valid, 54 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [820 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:56:46,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-01-31 17:56:46,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 751. [2022-01-31 17:56:46,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 744 states have (on average 1.3306451612903225) internal successors, (990), 744 states have internal predecessors, (990), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:56:46,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 997 transitions. [2022-01-31 17:56:46,738 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 997 transitions. Word has length 735 [2022-01-31 17:56:46,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:46,739 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 997 transitions. [2022-01-31 17:56:46,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 3.0161290322580645) internal successors, (374), 123 states have internal predecessors, (374), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:46,739 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 997 transitions. [2022-01-31 17:56:46,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2022-01-31 17:56:46,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:46,743 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 121, 121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:46,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 17:56:46,743 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:46,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:46,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1061452985, now seen corresponding path program 121 times [2022-01-31 17:56:46,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:46,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963167360] [2022-01-31 17:56:46,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:46,745 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:46,745 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:46,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:46,771 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:51,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:51,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:51,352 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:51,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963167360] [2022-01-31 17:56:51,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [963167360] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:51,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:51,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 17:56:51,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334140513] [2022-01-31 17:56:51,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:51,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 17:56:51,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:51,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 17:56:51,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:56:51,356 INFO L87 Difference]: Start difference. First operand 751 states and 997 transitions. Second operand has 125 states, 125 states have (on average 3.016) internal successors, (377), 124 states have internal predecessors, (377), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:00,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:00,076 INFO L93 Difference]: Finished difference Result 1142 states and 1518 transitions. [2022-01-31 17:57:00,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 17:57:00,076 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 3.016) internal successors, (377), 124 states have internal predecessors, (377), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 741 [2022-01-31 17:57:00,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:00,077 INFO L225 Difference]: With dead ends: 1142 [2022-01-31 17:57:00,077 INFO L226 Difference]: Without dead ends: 761 [2022-01-31 17:57:00,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 17:57:00,080 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 3382 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 850 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3384 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 850 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:00,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3384 Valid, 44 Invalid, 1895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [850 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:57:00,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-01-31 17:57:00,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 757. [2022-01-31 17:57:00,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 750 states have (on average 1.3306666666666667) internal successors, (998), 750 states have internal predecessors, (998), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:57:00,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1005 transitions. [2022-01-31 17:57:00,440 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1005 transitions. Word has length 741 [2022-01-31 17:57:00,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:00,441 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 1005 transitions. [2022-01-31 17:57:00,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 3.016) internal successors, (377), 124 states have internal predecessors, (377), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:00,441 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1005 transitions. [2022-01-31 17:57:00,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2022-01-31 17:57:00,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:00,445 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 122, 122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:00,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 17:57:00,445 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:00,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:00,445 INFO L85 PathProgramCache]: Analyzing trace with hash -676736173, now seen corresponding path program 122 times [2022-01-31 17:57:00,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:00,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750484382] [2022-01-31 17:57:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:00,446 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:00,447 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:00,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:00,469 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:05,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:05,070 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:05,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750484382] [2022-01-31 17:57:05,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1750484382] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:05,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:05,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 17:57:05,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595699152] [2022-01-31 17:57:05,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:05,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 17:57:05,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:05,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 17:57:05,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 17:57:05,072 INFO L87 Difference]: Start difference. First operand 757 states and 1005 transitions. Second operand has 126 states, 126 states have (on average 3.015873015873016) internal successors, (380), 125 states have internal predecessors, (380), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:14,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:14,072 INFO L93 Difference]: Finished difference Result 1151 states and 1530 transitions. [2022-01-31 17:57:14,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 17:57:14,073 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 3.015873015873016) internal successors, (380), 125 states have internal predecessors, (380), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 747 [2022-01-31 17:57:14,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:14,074 INFO L225 Difference]: With dead ends: 1151 [2022-01-31 17:57:14,074 INFO L226 Difference]: Without dead ends: 767 [2022-01-31 17:57:14,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 17:57:14,076 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2994 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2996 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 751 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:14,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2996 Valid, 59 Invalid, 1864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [751 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:57:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-01-31 17:57:14,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 763. [2022-01-31 17:57:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 756 states have (on average 1.3306878306878307) internal successors, (1006), 756 states have internal predecessors, (1006), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:57:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1013 transitions. [2022-01-31 17:57:14,437 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1013 transitions. Word has length 747 [2022-01-31 17:57:14,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:14,437 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 1013 transitions. [2022-01-31 17:57:14,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 3.015873015873016) internal successors, (380), 125 states have internal predecessors, (380), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:14,438 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1013 transitions. [2022-01-31 17:57:14,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 754 [2022-01-31 17:57:14,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:14,441 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 123, 123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:14,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 17:57:14,441 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:14,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:14,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1025988359, now seen corresponding path program 123 times [2022-01-31 17:57:14,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:14,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393088184] [2022-01-31 17:57:14,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:14,443 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:14,443 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:14,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:14,465 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:19,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:19,133 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:19,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393088184] [2022-01-31 17:57:19,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1393088184] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:19,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:19,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 17:57:19,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531010424] [2022-01-31 17:57:19,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:19,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 17:57:19,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:19,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 17:57:19,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:57:19,137 INFO L87 Difference]: Start difference. First operand 763 states and 1013 transitions. Second operand has 127 states, 127 states have (on average 3.015748031496063) internal successors, (383), 126 states have internal predecessors, (383), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:28,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:28,137 INFO L93 Difference]: Finished difference Result 1160 states and 1542 transitions. [2022-01-31 17:57:28,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 17:57:28,137 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 3.015748031496063) internal successors, (383), 126 states have internal predecessors, (383), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 753 [2022-01-31 17:57:28,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:28,139 INFO L225 Difference]: With dead ends: 1160 [2022-01-31 17:57:28,139 INFO L226 Difference]: Without dead ends: 773 [2022-01-31 17:57:28,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 17:57:28,141 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 3242 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3244 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:28,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3244 Valid, 59 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [813 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:57:28,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-01-31 17:57:28,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 769. [2022-01-31 17:57:28,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 762 states have (on average 1.330708661417323) internal successors, (1014), 762 states have internal predecessors, (1014), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:57:28,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1021 transitions. [2022-01-31 17:57:28,504 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1021 transitions. Word has length 753 [2022-01-31 17:57:28,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:28,504 INFO L470 AbstractCegarLoop]: Abstraction has 769 states and 1021 transitions. [2022-01-31 17:57:28,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 3.015748031496063) internal successors, (383), 126 states have internal predecessors, (383), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:28,504 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1021 transitions. [2022-01-31 17:57:28,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2022-01-31 17:57:28,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:28,508 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 124, 124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:28,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 17:57:28,508 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:28,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:28,508 INFO L85 PathProgramCache]: Analyzing trace with hash -974834669, now seen corresponding path program 124 times [2022-01-31 17:57:28,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:28,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236336584] [2022-01-31 17:57:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:28,510 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:28,510 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:28,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:28,535 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:33,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:33,300 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:33,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236336584] [2022-01-31 17:57:33,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1236336584] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:33,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:33,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 17:57:33,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691700154] [2022-01-31 17:57:33,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:33,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 17:57:33,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:33,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 17:57:33,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 17:57:33,303 INFO L87 Difference]: Start difference. First operand 769 states and 1021 transitions. Second operand has 128 states, 128 states have (on average 3.015625) internal successors, (386), 127 states have internal predecessors, (386), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:42,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:42,646 INFO L93 Difference]: Finished difference Result 1169 states and 1554 transitions. [2022-01-31 17:57:42,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 17:57:42,646 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 3.015625) internal successors, (386), 127 states have internal predecessors, (386), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 759 [2022-01-31 17:57:42,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:42,648 INFO L225 Difference]: With dead ends: 1169 [2022-01-31 17:57:42,648 INFO L226 Difference]: Without dead ends: 779 [2022-01-31 17:57:42,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 17:57:42,651 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 3146 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 788 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3148 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 788 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:42,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3148 Valid, 59 Invalid, 1917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [788 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:57:42,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-01-31 17:57:43,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 775. [2022-01-31 17:57:43,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 768 states have (on average 1.3307291666666667) internal successors, (1022), 768 states have internal predecessors, (1022), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:57:43,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1029 transitions. [2022-01-31 17:57:43,018 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1029 transitions. Word has length 759 [2022-01-31 17:57:43,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:43,019 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 1029 transitions. [2022-01-31 17:57:43,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 3.015625) internal successors, (386), 127 states have internal predecessors, (386), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:43,019 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1029 transitions. [2022-01-31 17:57:43,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 766 [2022-01-31 17:57:43,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:43,023 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 125, 125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:43,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 17:57:43,023 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:43,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:43,023 INFO L85 PathProgramCache]: Analyzing trace with hash 920569145, now seen corresponding path program 125 times [2022-01-31 17:57:43,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:43,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578310492] [2022-01-31 17:57:43,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:43,027 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:43,027 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:43,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:43,056 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:47,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:48,004 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:48,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578310492] [2022-01-31 17:57:48,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1578310492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:48,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:48,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 17:57:48,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005806320] [2022-01-31 17:57:48,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:48,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 17:57:48,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:48,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 17:57:48,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:57:48,008 INFO L87 Difference]: Start difference. First operand 775 states and 1029 transitions. Second operand has 129 states, 129 states have (on average 3.0155038759689923) internal successors, (389), 128 states have internal predecessors, (389), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:57,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:57,267 INFO L93 Difference]: Finished difference Result 1178 states and 1566 transitions. [2022-01-31 17:57:57,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 17:57:57,267 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 3.0155038759689923) internal successors, (389), 128 states have internal predecessors, (389), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 765 [2022-01-31 17:57:57,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:57,269 INFO L225 Difference]: With dead ends: 1178 [2022-01-31 17:57:57,269 INFO L226 Difference]: Without dead ends: 785 [2022-01-31 17:57:57,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 17:57:57,272 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 3278 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 822 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3280 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 822 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:57,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3280 Valid, 54 Invalid, 1939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [822 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:57:57,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-01-31 17:57:57,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 781. [2022-01-31 17:57:57,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 774 states have (on average 1.330749354005168) internal successors, (1030), 774 states have internal predecessors, (1030), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:57:57,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1037 transitions. [2022-01-31 17:57:57,658 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1037 transitions. Word has length 765 [2022-01-31 17:57:57,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:57,659 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 1037 transitions. [2022-01-31 17:57:57,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 3.0155038759689923) internal successors, (389), 128 states have internal predecessors, (389), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:57,659 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1037 transitions. [2022-01-31 17:57:57,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2022-01-31 17:57:57,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:57,663 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:57,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 17:57:57,663 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:57,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:57,663 INFO L85 PathProgramCache]: Analyzing trace with hash 853615827, now seen corresponding path program 126 times [2022-01-31 17:57:57,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:57,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560124045] [2022-01-31 17:57:57,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:57,665 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:57,665 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:57,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:57,692 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:02,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:02,600 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:02,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560124045] [2022-01-31 17:58:02,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1560124045] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:02,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:02,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 17:58:02,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400848096] [2022-01-31 17:58:02,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:02,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 17:58:02,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:02,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 17:58:02,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 17:58:02,610 INFO L87 Difference]: Start difference. First operand 781 states and 1037 transitions. Second operand has 130 states, 130 states have (on average 3.0153846153846153) internal successors, (392), 129 states have internal predecessors, (392), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:12,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:12,210 INFO L93 Difference]: Finished difference Result 1187 states and 1578 transitions. [2022-01-31 17:58:12,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 17:58:12,211 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 3.0153846153846153) internal successors, (392), 129 states have internal predecessors, (392), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 771 [2022-01-31 17:58:12,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:12,212 INFO L225 Difference]: With dead ends: 1187 [2022-01-31 17:58:12,212 INFO L226 Difference]: Without dead ends: 791 [2022-01-31 17:58:12,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 17:58:12,215 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 3098 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3100 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 777 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:12,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3100 Valid, 64 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [777 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:58:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-01-31 17:58:12,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 787. [2022-01-31 17:58:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 780 states have (on average 1.3307692307692307) internal successors, (1038), 780 states have internal predecessors, (1038), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:12,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1045 transitions. [2022-01-31 17:58:12,621 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1045 transitions. Word has length 771 [2022-01-31 17:58:12,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:12,621 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 1045 transitions. [2022-01-31 17:58:12,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 3.0153846153846153) internal successors, (392), 129 states have internal predecessors, (392), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:12,622 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1045 transitions. [2022-01-31 17:58:12,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2022-01-31 17:58:12,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:12,626 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 127, 127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:12,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 17:58:12,626 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:12,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:12,626 INFO L85 PathProgramCache]: Analyzing trace with hash 217239929, now seen corresponding path program 127 times [2022-01-31 17:58:12,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:12,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910743280] [2022-01-31 17:58:12,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:12,628 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:12,628 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:12,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:12,659 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:17,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:17,592 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 17:58:17,592 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:17,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910743280] [2022-01-31 17:58:17,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1910743280] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:17,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:17,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 17:58:17,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689957721] [2022-01-31 17:58:17,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:17,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 17:58:17,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:17,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 17:58:17,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:58:17,595 INFO L87 Difference]: Start difference. First operand 787 states and 1045 transitions. Second operand has 131 states, 131 states have (on average 3.015267175572519) internal successors, (395), 130 states have internal predecessors, (395), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:27,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:27,484 INFO L93 Difference]: Finished difference Result 1196 states and 1590 transitions. [2022-01-31 17:58:27,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 17:58:27,485 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 3.015267175572519) internal successors, (395), 130 states have internal predecessors, (395), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 777 [2022-01-31 17:58:27,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:27,486 INFO L225 Difference]: With dead ends: 1196 [2022-01-31 17:58:27,486 INFO L226 Difference]: Without dead ends: 797 [2022-01-31 17:58:27,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8255 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 17:58:27,489 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 3218 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3220 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:27,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3220 Valid, 59 Invalid, 1960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:58:27,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-01-31 17:58:27,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 793. [2022-01-31 17:58:27,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 786 states have (on average 1.3307888040712468) internal successors, (1046), 786 states have internal predecessors, (1046), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:27,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1053 transitions. [2022-01-31 17:58:27,874 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1053 transitions. Word has length 777 [2022-01-31 17:58:27,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:27,874 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 1053 transitions. [2022-01-31 17:58:27,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 3.015267175572519) internal successors, (395), 130 states have internal predecessors, (395), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:27,874 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1053 transitions. [2022-01-31 17:58:27,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2022-01-31 17:58:27,878 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:27,878 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:27,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 17:58:27,878 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:27,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:27,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1497258605, now seen corresponding path program 128 times [2022-01-31 17:58:27,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:27,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36971265] [2022-01-31 17:58:27,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:27,880 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:27,880 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:27,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:27,908 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:32,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:32,961 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:32,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36971265] [2022-01-31 17:58:32,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [36971265] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:32,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:32,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 17:58:32,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497473168] [2022-01-31 17:58:32,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:32,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 17:58:32,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:32,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 17:58:32,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 17:58:32,964 INFO L87 Difference]: Start difference. First operand 793 states and 1053 transitions. Second operand has 132 states, 132 states have (on average 3.015151515151515) internal successors, (398), 131 states have internal predecessors, (398), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:42,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:42,729 INFO L93 Difference]: Finished difference Result 1205 states and 1602 transitions. [2022-01-31 17:58:42,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 17:58:42,729 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 3.015151515151515) internal successors, (398), 131 states have internal predecessors, (398), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 783 [2022-01-31 17:58:42,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:42,730 INFO L225 Difference]: With dead ends: 1205 [2022-01-31 17:58:42,730 INFO L226 Difference]: Without dead ends: 803 [2022-01-31 17:58:42,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 17:58:42,733 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 3142 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 790 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3144 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 790 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:42,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3144 Valid, 74 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [790 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:58:42,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-01-31 17:58:43,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 799. [2022-01-31 17:58:43,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 792 states have (on average 1.3308080808080809) internal successors, (1054), 792 states have internal predecessors, (1054), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:43,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1061 transitions. [2022-01-31 17:58:43,127 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1061 transitions. Word has length 783 [2022-01-31 17:58:43,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:43,127 INFO L470 AbstractCegarLoop]: Abstraction has 799 states and 1061 transitions. [2022-01-31 17:58:43,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 3.015151515151515) internal successors, (398), 131 states have internal predecessors, (398), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:43,127 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1061 transitions. [2022-01-31 17:58:43,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2022-01-31 17:58:43,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:43,132 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 129, 129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:43,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 17:58:43,132 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:43,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:43,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1504759225, now seen corresponding path program 129 times [2022-01-31 17:58:43,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:43,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276667023] [2022-01-31 17:58:43,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:43,133 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:43,134 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:43,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:43,175 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:48,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:48,297 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:48,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276667023] [2022-01-31 17:58:48,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [276667023] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:48,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:48,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 17:58:48,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193835570] [2022-01-31 17:58:48,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:48,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 17:58:48,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:48,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 17:58:48,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:58:48,300 INFO L87 Difference]: Start difference. First operand 799 states and 1061 transitions. Second operand has 133 states, 133 states have (on average 3.0150375939849625) internal successors, (401), 132 states have internal predecessors, (401), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:58,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:58,572 INFO L93 Difference]: Finished difference Result 1214 states and 1614 transitions. [2022-01-31 17:58:58,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 17:58:58,572 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 3.0150375939849625) internal successors, (401), 132 states have internal predecessors, (401), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 789 [2022-01-31 17:58:58,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:58,573 INFO L225 Difference]: With dead ends: 1214 [2022-01-31 17:58:58,574 INFO L226 Difference]: Without dead ends: 809 [2022-01-31 17:58:58,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 17:58:58,576 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 3602 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 903 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3604 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 903 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:58,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3604 Valid, 44 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [903 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:58:58,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-01-31 17:58:58,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 805. [2022-01-31 17:58:58,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 798 states have (on average 1.330827067669173) internal successors, (1062), 798 states have internal predecessors, (1062), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:58,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1069 transitions. [2022-01-31 17:58:58,975 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1069 transitions. Word has length 789 [2022-01-31 17:58:58,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:58,975 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 1069 transitions. [2022-01-31 17:58:58,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 3.0150375939849625) internal successors, (401), 132 states have internal predecessors, (401), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:58,976 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1069 transitions. [2022-01-31 17:58:58,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2022-01-31 17:58:58,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:58,980 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:58,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 17:58:58,980 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:58,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:58,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1185592915, now seen corresponding path program 130 times [2022-01-31 17:58:58,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:58,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322722466] [2022-01-31 17:58:58,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:58,982 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:58,982 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:58,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:59,010 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:04,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:04,157 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:04,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322722466] [2022-01-31 17:59:04,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [322722466] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:04,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:04,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 17:59:04,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392302854] [2022-01-31 17:59:04,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:04,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 17:59:04,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:04,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 17:59:04,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 17:59:04,160 INFO L87 Difference]: Start difference. First operand 805 states and 1069 transitions. Second operand has 134 states, 134 states have (on average 3.014925373134328) internal successors, (404), 133 states have internal predecessors, (404), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)