/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_running-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:56:54,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:56:54,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:56:54,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:56:54,859 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:56:54,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:56:54,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:56:54,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:56:54,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:56:54,865 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:56:54,867 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:56:54,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:56:54,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:56:54,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:56:54,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:56:54,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:56:54,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:56:54,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:56:54,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:56:54,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:56:54,892 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 17:56:54,901 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:56:54,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:56:54,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:56:54,903 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:56:54,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:56:54,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:56:54,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:56:54,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:56:54,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:56:54,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:56:54,904 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:56:54,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:56:54,905 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:56:54,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:56:54,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:56:54,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:56:54,905 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:56:54,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:56:54,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:56:54,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:56:54,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:56:54,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:56:54,906 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:56:54,906 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:56:55,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:56:55,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:56:55,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:56:55,152 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:56:55,153 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:56:55,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_running-1.i [2022-01-31 17:56:55,204 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a664d44e2/1ef667f0d12547feab2f997c1d30e13d/FLAG86fd09c5f [2022-01-31 17:56:55,620 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:56:55,621 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_running-1.i [2022-01-31 17:56:55,629 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a664d44e2/1ef667f0d12547feab2f997c1d30e13d/FLAG86fd09c5f [2022-01-31 17:56:55,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a664d44e2/1ef667f0d12547feab2f997c1d30e13d [2022-01-31 17:56:55,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:56:55,648 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:56:55,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:56:55,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:56:55,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:56:55,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:56:55" (1/1) ... [2022-01-31 17:56:55,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4579e834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:55, skipping insertion in model container [2022-01-31 17:56:55,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:56:55" (1/1) ... [2022-01-31 17:56:55,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:56:55,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:56:55,836 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_running-1.i[811,824] [2022-01-31 17:56:55,857 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:56:55,862 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:56:55,872 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_running-1.i[811,824] [2022-01-31 17:56:55,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:56:55,893 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:56:55,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:55 WrapperNode [2022-01-31 17:56:55,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:56:55,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:56:55,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:56:55,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:56:55,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:55" (1/1) ... [2022-01-31 17:56:55,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:55" (1/1) ... [2022-01-31 17:56:55,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:55" (1/1) ... [2022-01-31 17:56:55,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:55" (1/1) ... [2022-01-31 17:56:55,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:55" (1/1) ... [2022-01-31 17:56:55,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:55" (1/1) ... [2022-01-31 17:56:55,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:55" (1/1) ... [2022-01-31 17:56:55,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:56:55,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:56:55,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:56:55,941 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:56:55,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:55" (1/1) ... [2022-01-31 17:56:55,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:56:55,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:56:55,968 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 17:56:55,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 17:56:56,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:56:56,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:56:56,010 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:56:56,010 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:56:56,010 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:56:56,010 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:56:56,011 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:56:56,011 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:56:56,011 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:56:56,012 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:56:56,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:56:56,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:56:56,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 17:56:56,012 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:56:56,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:56:56,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:56:56,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:56:56,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:56:56,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:56:56,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:56:56,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:56:56,068 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:56:56,069 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:56:56,234 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:56:56,239 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:56:56,239 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 17:56:56,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:56:56 BoogieIcfgContainer [2022-01-31 17:56:56,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:56:56,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:56:56,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:56:56,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:56:56,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:56:55" (1/3) ... [2022-01-31 17:56:56,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3514c080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:56:56, skipping insertion in model container [2022-01-31 17:56:56,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:56:55" (2/3) ... [2022-01-31 17:56:56,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3514c080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:56:56, skipping insertion in model container [2022-01-31 17:56:56,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:56:56" (3/3) ... [2022-01-31 17:56:56,246 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_running-1.i [2022-01-31 17:56:56,250 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:56:56,250 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:56:56,303 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:56:56,308 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 17:56:56,308 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:56:56,346 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:56:56,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 17:56:56,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:56,366 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:56,366 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:56,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:56,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1480627234, now seen corresponding path program 1 times [2022-01-31 17:56:56,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:56,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735216867] [2022-01-31 17:56:56,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:56,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:56,481 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:56,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:56,608 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:56,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735216867] [2022-01-31 17:56:56,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1735216867] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:56,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:56,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:56:56,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467916366] [2022-01-31 17:56:56,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:56,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:56:56,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:56,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:56:56,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:56:56,636 INFO L87 Difference]: Start difference. First operand has 32 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:56,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:56,673 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2022-01-31 17:56:56,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:56:56,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 17:56:56,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:56,682 INFO L225 Difference]: With dead ends: 56 [2022-01-31 17:56:56,682 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 17:56:56,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:56:56,693 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 30 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:56,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:56:56,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 17:56:56,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-31 17:56:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:56,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-31 17:56:56,738 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 15 [2022-01-31 17:56:56,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:56,739 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-31 17:56:56,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:56,740 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-31 17:56:56,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 17:56:56,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:56,741 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:56,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:56:56,742 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:56,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:56,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1732153775, now seen corresponding path program 1 times [2022-01-31 17:56:56,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:56,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873207228] [2022-01-31 17:56:56,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:56,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:56,754 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:56,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:56,852 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:56,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873207228] [2022-01-31 17:56:56,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [873207228] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:56,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:56,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:56:56,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897508965] [2022-01-31 17:56:56,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:56,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:56:56,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:56,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:56:56,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:56:56,855 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:56,957 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2022-01-31 17:56:56,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:56:56,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 17:56:56,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:56,959 INFO L225 Difference]: With dead ends: 54 [2022-01-31 17:56:56,959 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 17:56:56,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:56:56,964 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:56,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 28 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:56,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 17:56:56,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2022-01-31 17:56:56,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:56,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-01-31 17:56:56,978 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2022-01-31 17:56:56,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:56,979 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-01-31 17:56:56,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:56,980 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-01-31 17:56:56,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 17:56:56,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:56,982 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, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:56,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:56:56,983 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:56,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:56,986 INFO L85 PathProgramCache]: Analyzing trace with hash -562644404, now seen corresponding path program 1 times [2022-01-31 17:56:56,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:56,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170715207] [2022-01-31 17:56:56,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:57,008 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:57,008 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:57,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:57,010 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:57,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:57,098 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:57,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170715207] [2022-01-31 17:56:57,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [170715207] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:57,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:57,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:56:57,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848541923] [2022-01-31 17:56:57,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:57,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:56:57,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:57,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:56:57,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:56:57,102 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:57,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:57,230 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2022-01-31 17:56:57,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:56:57,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 17:56:57,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:57,233 INFO L225 Difference]: With dead ends: 68 [2022-01-31 17:56:57,233 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 17:56:57,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:56:57,235 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 82 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:57,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 33 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:57,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 17:56:57,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2022-01-31 17:56:57,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:57,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-01-31 17:56:57,246 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 27 [2022-01-31 17:56:57,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:57,246 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-01-31 17:56:57,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:57,246 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-01-31 17:56:57,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 17:56:57,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:57,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:57,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:56:57,248 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:57,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:57,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1666278253, now seen corresponding path program 2 times [2022-01-31 17:56:57,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:57,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659719416] [2022-01-31 17:56:57,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:57,252 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:57,252 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:57,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:57,253 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:57,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:57,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:57,383 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:57,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659719416] [2022-01-31 17:56:57,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1659719416] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:57,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:57,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:56:57,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164381753] [2022-01-31 17:56:57,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:57,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:56:57,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:57,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:56:57,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:56:57,386 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:57,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:57,529 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2022-01-31 17:56:57,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:56:57,530 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 17:56:57,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:57,533 INFO L225 Difference]: With dead ends: 67 [2022-01-31 17:56:57,533 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 17:56:57,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:56:57,541 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 33 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:57,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 41 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:57,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 17:56:57,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2022-01-31 17:56:57,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 43 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:57,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2022-01-31 17:56:57,567 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 39 [2022-01-31 17:56:57,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:57,567 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2022-01-31 17:56:57,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:57,568 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2022-01-31 17:56:57,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 17:56:57,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:57,569 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:57,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:56:57,569 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:57,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:57,570 INFO L85 PathProgramCache]: Analyzing trace with hash 340958061, now seen corresponding path program 1 times [2022-01-31 17:56:57,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:57,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949046162] [2022-01-31 17:56:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:57,574 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:57,574 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:57,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:57,575 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:57,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:57,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:57,673 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:57,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949046162] [2022-01-31 17:56:57,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [949046162] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:57,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:57,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:56:57,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082402488] [2022-01-31 17:56:57,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:57,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:56:57,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:57,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:56:57,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:56:57,675 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:57,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:57,821 INFO L93 Difference]: Finished difference Result 114 states and 156 transitions. [2022-01-31 17:56:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:56:57,822 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 17:56:57,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:57,822 INFO L225 Difference]: With dead ends: 114 [2022-01-31 17:56:57,823 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 17:56:57,823 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 17:56:57,824 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 110 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:57,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 38 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:57,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 17:56:57,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 64. [2022-01-31 17:56:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 59 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:57,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2022-01-31 17:56:57,868 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 39 [2022-01-31 17:56:57,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:57,868 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2022-01-31 17:56:57,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:57,869 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2022-01-31 17:56:57,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 17:56:57,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:57,871 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:57,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:56:57,872 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:57,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:57,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1892223976, now seen corresponding path program 2 times [2022-01-31 17:56:57,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:57,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454071813] [2022-01-31 17:56:57,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:57,878 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:57,878 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:57,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:57,880 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:57,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:57,982 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:57,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454071813] [2022-01-31 17:56:57,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [454071813] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:57,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:57,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:56:57,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68077770] [2022-01-31 17:56:57,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:57,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:56:57,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:57,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:56:57,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:56:57,984 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:58,159 INFO L93 Difference]: Finished difference Result 144 states and 198 transitions. [2022-01-31 17:56:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:56:58,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 17:56:58,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:58,163 INFO L225 Difference]: With dead ends: 144 [2022-01-31 17:56:58,163 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 17:56:58,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:56:58,165 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 164 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:58,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 33 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:58,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 17:56:58,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2022-01-31 17:56:58,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.36) internal successors, (102), 75 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2022-01-31 17:56:58,189 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 51 [2022-01-31 17:56:58,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:58,189 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2022-01-31 17:56:58,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:58,190 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2022-01-31 17:56:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 17:56:58,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:58,191 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:58,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:56:58,191 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:58,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:58,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1407530633, now seen corresponding path program 3 times [2022-01-31 17:56:58,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:58,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489374797] [2022-01-31 17:56:58,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:58,194 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:58,194 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:58,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:58,196 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:58,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:58,302 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:58,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489374797] [2022-01-31 17:56:58,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1489374797] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:58,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:58,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:56:58,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408814396] [2022-01-31 17:56:58,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:58,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:56:58,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:58,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:56:58,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:56:58,305 INFO L87 Difference]: Start difference. First operand 80 states and 106 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:58,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:58,501 INFO L93 Difference]: Finished difference Result 174 states and 240 transitions. [2022-01-31 17:56:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:56:58,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 63 [2022-01-31 17:56:58,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:58,503 INFO L225 Difference]: With dead ends: 174 [2022-01-31 17:56:58,503 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 17:56:58,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:56:58,504 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 244 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:58,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 28 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:58,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 17:56:58,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2022-01-31 17:56:58,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 91 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:58,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 128 transitions. [2022-01-31 17:56:58,522 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 128 transitions. Word has length 63 [2022-01-31 17:56:58,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:58,522 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 128 transitions. [2022-01-31 17:56:58,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:58,522 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 128 transitions. [2022-01-31 17:56:58,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 17:56:58,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:58,523 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:58,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:56:58,523 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:58,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:58,524 INFO L85 PathProgramCache]: Analyzing trace with hash 770657092, now seen corresponding path program 4 times [2022-01-31 17:56:58,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:58,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709513192] [2022-01-31 17:56:58,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:58,526 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:58,526 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:58,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:58,527 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:58,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:58,619 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:58,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709513192] [2022-01-31 17:56:58,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1709513192] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:58,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:58,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:56:58,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153997239] [2022-01-31 17:56:58,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:58,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:56:58,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:58,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:56:58,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:56:58,621 INFO L87 Difference]: Start difference. First operand 96 states and 128 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:58,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:58,819 INFO L93 Difference]: Finished difference Result 204 states and 282 transitions. [2022-01-31 17:56:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:56:58,820 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 17:56:58,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:58,821 INFO L225 Difference]: With dead ends: 204 [2022-01-31 17:56:58,821 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 17:56:58,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:56:58,822 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 259 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:58,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 38 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:58,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 17:56:58,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 112. [2022-01-31 17:56:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.3644859813084111) internal successors, (146), 107 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:58,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 150 transitions. [2022-01-31 17:56:58,843 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 150 transitions. Word has length 75 [2022-01-31 17:56:58,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:58,843 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 150 transitions. [2022-01-31 17:56:58,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:58,843 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 150 transitions. [2022-01-31 17:56:58,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 17:56:58,844 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:58,844 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:58,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:56:58,845 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:58,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:58,845 INFO L85 PathProgramCache]: Analyzing trace with hash 264519589, now seen corresponding path program 5 times [2022-01-31 17:56:58,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:58,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738225142] [2022-01-31 17:56:58,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:58,847 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:58,847 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:58,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:58,848 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:58,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:58,935 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:58,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738225142] [2022-01-31 17:56:58,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1738225142] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:58,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:58,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:56:58,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196487053] [2022-01-31 17:56:58,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:58,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:56:58,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:58,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:56:58,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:56:58,948 INFO L87 Difference]: Start difference. First operand 112 states and 150 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:59,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:59,185 INFO L93 Difference]: Finished difference Result 234 states and 324 transitions. [2022-01-31 17:56:59,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:56:59,185 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-01-31 17:56:59,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:59,186 INFO L225 Difference]: With dead ends: 234 [2022-01-31 17:56:59,186 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 17:56:59,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:56:59,187 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 287 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:59,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 38 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:56:59,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 17:56:59,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 128. [2022-01-31 17:56:59,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.3658536585365855) internal successors, (168), 123 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:59,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 172 transitions. [2022-01-31 17:56:59,211 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 172 transitions. Word has length 87 [2022-01-31 17:56:59,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:59,211 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 172 transitions. [2022-01-31 17:56:59,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:59,212 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 172 transitions. [2022-01-31 17:56:59,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 17:56:59,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:59,213 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:59,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:56:59,213 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:59,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:59,213 INFO L85 PathProgramCache]: Analyzing trace with hash 190269600, now seen corresponding path program 6 times [2022-01-31 17:56:59,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:59,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417705828] [2022-01-31 17:56:59,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:59,216 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:59,216 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:59,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:59,217 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:59,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:59,340 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:59,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417705828] [2022-01-31 17:56:59,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1417705828] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:59,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:59,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:56:59,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137786559] [2022-01-31 17:56:59,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:59,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:56:59,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:59,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:56:59,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:56:59,342 INFO L87 Difference]: Start difference. First operand 128 states and 172 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 17:56:59,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:59,622 INFO L93 Difference]: Finished difference Result 264 states and 366 transitions. [2022-01-31 17:56:59,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:56:59,622 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 99 [2022-01-31 17:56:59,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:59,623 INFO L225 Difference]: With dead ends: 264 [2022-01-31 17:56:59,623 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 17:56:59,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:56:59,625 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 393 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:59,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 33 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:56:59,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 17:56:59,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 144. [2022-01-31 17:56:59,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.3669064748201438) internal successors, (190), 139 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:59,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 194 transitions. [2022-01-31 17:56:59,652 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 194 transitions. Word has length 99 [2022-01-31 17:56:59,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:59,652 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 194 transitions. [2022-01-31 17:56:59,653 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 17:56:59,653 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 194 transitions. [2022-01-31 17:56:59,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 17:56:59,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:59,654 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:59,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:56:59,654 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:59,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:59,654 INFO L85 PathProgramCache]: Analyzing trace with hash 423278273, now seen corresponding path program 7 times [2022-01-31 17:56:59,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:59,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268828082] [2022-01-31 17:56:59,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:59,656 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:59,657 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:59,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:59,658 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:59,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:59,763 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:59,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268828082] [2022-01-31 17:56:59,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [268828082] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:59,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:59,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:56:59,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641541387] [2022-01-31 17:56:59,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:59,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:56:59,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:59,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:56:59,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:56:59,765 INFO L87 Difference]: Start difference. First operand 144 states and 194 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:00,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:00,082 INFO L93 Difference]: Finished difference Result 294 states and 408 transitions. [2022-01-31 17:57:00,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:57:00,083 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-01-31 17:57:00,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:00,084 INFO L225 Difference]: With dead ends: 294 [2022-01-31 17:57:00,084 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 17:57:00,085 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 17:57:00,085 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 343 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:00,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 43 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:57:00,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 17:57:00,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 160. [2022-01-31 17:57:00,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.367741935483871) internal successors, (212), 155 states have internal predecessors, (212), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 216 transitions. [2022-01-31 17:57:00,110 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 216 transitions. Word has length 111 [2022-01-31 17:57:00,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:00,110 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 216 transitions. [2022-01-31 17:57:00,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:00,111 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 216 transitions. [2022-01-31 17:57:00,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 17:57:00,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:00,112 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:00,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:57:00,112 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:00,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:00,112 INFO L85 PathProgramCache]: Analyzing trace with hash 987759612, now seen corresponding path program 8 times [2022-01-31 17:57:00,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:00,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523634567] [2022-01-31 17:57:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:00,115 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:00,115 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:00,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:00,116 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:00,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:00,233 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:00,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523634567] [2022-01-31 17:57:00,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1523634567] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:00,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:00,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:57:00,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593188842] [2022-01-31 17:57:00,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:00,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:57:00,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:00,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:57:00,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:57:00,235 INFO L87 Difference]: Start difference. First operand 160 states and 216 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:00,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:00,578 INFO L93 Difference]: Finished difference Result 324 states and 450 transitions. [2022-01-31 17:57:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:57:00,579 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-01-31 17:57:00,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:00,580 INFO L225 Difference]: With dead ends: 324 [2022-01-31 17:57:00,580 INFO L226 Difference]: Without dead ends: 189 [2022-01-31 17:57:00,581 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 17:57:00,581 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 384 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:00,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 43 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:57:00,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-31 17:57:00,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 176. [2022-01-31 17:57:00,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.368421052631579) internal successors, (234), 171 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:00,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 238 transitions. [2022-01-31 17:57:00,611 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 238 transitions. Word has length 123 [2022-01-31 17:57:00,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:00,611 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 238 transitions. [2022-01-31 17:57:00,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:00,611 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 238 transitions. [2022-01-31 17:57:00,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 17:57:00,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:00,612 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:00,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:57:00,613 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:00,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:00,613 INFO L85 PathProgramCache]: Analyzing trace with hash -90989603, now seen corresponding path program 9 times [2022-01-31 17:57:00,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:00,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686135228] [2022-01-31 17:57:00,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:00,615 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:00,616 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:00,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:00,617 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:00,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:00,769 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:00,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686135228] [2022-01-31 17:57:00,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [686135228] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:00,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:00,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:57:00,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390496220] [2022-01-31 17:57:00,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:00,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:57:00,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:00,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:57:00,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:57:00,771 INFO L87 Difference]: Start difference. First operand 176 states and 238 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 17:57:01,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:01,145 INFO L93 Difference]: Finished difference Result 354 states and 492 transitions. [2022-01-31 17:57:01,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:57:01,146 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 135 [2022-01-31 17:57:01,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:01,147 INFO L225 Difference]: With dead ends: 354 [2022-01-31 17:57:01,147 INFO L226 Difference]: Without dead ends: 205 [2022-01-31 17:57:01,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:57:01,148 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 451 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:01,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 48 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:57:01,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-31 17:57:01,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 192. [2022-01-31 17:57:01,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.3689839572192513) internal successors, (256), 187 states have internal predecessors, (256), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:01,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 260 transitions. [2022-01-31 17:57:01,182 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 260 transitions. Word has length 135 [2022-01-31 17:57:01,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:01,182 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 260 transitions. [2022-01-31 17:57:01,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 17:57:01,183 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 260 transitions. [2022-01-31 17:57:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 17:57:01,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:01,184 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:01,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:57:01,184 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:01,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:01,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1147698520, now seen corresponding path program 10 times [2022-01-31 17:57:01,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:01,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500508712] [2022-01-31 17:57:01,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:01,187 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:01,187 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:01,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:01,189 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:01,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:01,329 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:01,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500508712] [2022-01-31 17:57:01,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1500508712] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:01,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:01,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:57:01,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754840558] [2022-01-31 17:57:01,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:01,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:57:01,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:01,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:57:01,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:57:01,331 INFO L87 Difference]: Start difference. First operand 192 states and 260 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:01,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:01,763 INFO L93 Difference]: Finished difference Result 384 states and 534 transitions. [2022-01-31 17:57:01,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:57:01,764 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-01-31 17:57:01,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:01,765 INFO L225 Difference]: With dead ends: 384 [2022-01-31 17:57:01,765 INFO L226 Difference]: Without dead ends: 221 [2022-01-31 17:57:01,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:57:01,766 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 596 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:01,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 33 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:57:01,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-01-31 17:57:01,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 208. [2022-01-31 17:57:01,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.3694581280788178) internal successors, (278), 203 states have internal predecessors, (278), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:01,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 282 transitions. [2022-01-31 17:57:01,809 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 282 transitions. Word has length 147 [2022-01-31 17:57:01,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:01,809 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 282 transitions. [2022-01-31 17:57:01,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:01,809 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 282 transitions. [2022-01-31 17:57:01,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 17:57:01,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:01,811 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:01,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:57:01,811 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:01,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:01,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1759908103, now seen corresponding path program 11 times [2022-01-31 17:57:01,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:01,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523378554] [2022-01-31 17:57:01,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:01,814 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:01,814 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:01,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:01,815 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:01,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:01,965 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 17:57:01,965 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:01,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523378554] [2022-01-31 17:57:01,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1523378554] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:01,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:01,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:57:01,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036510939] [2022-01-31 17:57:01,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:01,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:57:01,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:01,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:57:01,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:57:01,967 INFO L87 Difference]: Start difference. First operand 208 states and 282 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:02,375 INFO L93 Difference]: Finished difference Result 414 states and 576 transitions. [2022-01-31 17:57:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:57:02,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-01-31 17:57:02,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:02,377 INFO L225 Difference]: With dead ends: 414 [2022-01-31 17:57:02,377 INFO L226 Difference]: Without dead ends: 237 [2022-01-31 17:57:02,378 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 17:57:02,378 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 494 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:02,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 58 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:57:02,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-31 17:57:02,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 224. [2022-01-31 17:57:02,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.36986301369863) internal successors, (300), 219 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:02,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 304 transitions. [2022-01-31 17:57:02,419 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 304 transitions. Word has length 159 [2022-01-31 17:57:02,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:02,420 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 304 transitions. [2022-01-31 17:57:02,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:02,420 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 304 transitions. [2022-01-31 17:57:02,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 17:57:02,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:02,421 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:02,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:57:02,422 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:02,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:02,422 INFO L85 PathProgramCache]: Analyzing trace with hash -439372620, now seen corresponding path program 12 times [2022-01-31 17:57:02,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:02,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345294752] [2022-01-31 17:57:02,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:02,424 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:02,424 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:02,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:02,426 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:02,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:02,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:02,602 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:02,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345294752] [2022-01-31 17:57:02,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1345294752] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:02,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:02,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:57:02,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864720818] [2022-01-31 17:57:02,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:02,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:57:02,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:02,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:57:02,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:57:02,604 INFO L87 Difference]: Start difference. First operand 224 states and 304 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 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 17:57:03,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:03,111 INFO L93 Difference]: Finished difference Result 444 states and 618 transitions. [2022-01-31 17:57:03,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:57:03,112 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 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 171 [2022-01-31 17:57:03,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:03,114 INFO L225 Difference]: With dead ends: 444 [2022-01-31 17:57:03,114 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 17:57:03,115 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 17:57:03,115 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 665 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:03,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [665 Valid, 38 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:57:03,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 17:57:03,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 240. [2022-01-31 17:57:03,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.3702127659574468) internal successors, (322), 235 states have internal predecessors, (322), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:03,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 326 transitions. [2022-01-31 17:57:03,165 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 326 transitions. Word has length 171 [2022-01-31 17:57:03,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:03,166 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 326 transitions. [2022-01-31 17:57:03,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 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 17:57:03,166 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 326 transitions. [2022-01-31 17:57:03,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 17:57:03,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:03,168 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:03,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:57:03,169 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:03,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:03,170 INFO L85 PathProgramCache]: Analyzing trace with hash -887574507, now seen corresponding path program 13 times [2022-01-31 17:57:03,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:03,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431394552] [2022-01-31 17:57:03,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:03,173 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:03,173 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:03,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:03,174 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:03,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:03,389 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:03,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431394552] [2022-01-31 17:57:03,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1431394552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:03,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:03,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:57:03,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802506233] [2022-01-31 17:57:03,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:03,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:57:03,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:03,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:57:03,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:57:03,391 INFO L87 Difference]: Start difference. First operand 240 states and 326 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:03,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:03,948 INFO L93 Difference]: Finished difference Result 474 states and 660 transitions. [2022-01-31 17:57:03,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:57:03,949 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-01-31 17:57:03,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:03,950 INFO L225 Difference]: With dead ends: 474 [2022-01-31 17:57:03,950 INFO L226 Difference]: Without dead ends: 269 [2022-01-31 17:57:03,951 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 17:57:03,951 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 732 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:03,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [732 Valid, 38 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:57:03,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-31 17:57:03,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 256. [2022-01-31 17:57:03,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.3705179282868525) internal successors, (344), 251 states have internal predecessors, (344), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:03,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 348 transitions. [2022-01-31 17:57:03,994 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 348 transitions. Word has length 183 [2022-01-31 17:57:03,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:03,995 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 348 transitions. [2022-01-31 17:57:03,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:03,995 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 348 transitions. [2022-01-31 17:57:03,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 17:57:03,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:03,997 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:03,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:57:03,997 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:03,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:03,997 INFO L85 PathProgramCache]: Analyzing trace with hash -218846704, now seen corresponding path program 14 times [2022-01-31 17:57:03,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:03,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971759289] [2022-01-31 17:57:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:03,999 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:03,999 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:04,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:04,001 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:04,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:04,203 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:04,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971759289] [2022-01-31 17:57:04,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1971759289] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:04,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:04,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:57:04,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573078308] [2022-01-31 17:57:04,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:04,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:57:04,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:04,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:57:04,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:57:04,204 INFO L87 Difference]: Start difference. First operand 256 states and 348 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:04,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:04,794 INFO L93 Difference]: Finished difference Result 504 states and 702 transitions. [2022-01-31 17:57:04,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:57:04,794 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-01-31 17:57:04,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:04,796 INFO L225 Difference]: With dead ends: 504 [2022-01-31 17:57:04,796 INFO L226 Difference]: Without dead ends: 285 [2022-01-31 17:57:04,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:57:04,798 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 695 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:04,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 48 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:57:04,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-31 17:57:04,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 272. [2022-01-31 17:57:04,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 267 states have (on average 1.3707865168539326) internal successors, (366), 267 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:04,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 370 transitions. [2022-01-31 17:57:04,846 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 370 transitions. Word has length 195 [2022-01-31 17:57:04,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:04,848 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 370 transitions. [2022-01-31 17:57:04,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:04,848 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 370 transitions. [2022-01-31 17:57:04,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 17:57:04,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:04,851 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:04,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:57:04,852 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:04,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:04,852 INFO L85 PathProgramCache]: Analyzing trace with hash 198893361, now seen corresponding path program 15 times [2022-01-31 17:57:04,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:04,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35869561] [2022-01-31 17:57:04,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:04,854 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:04,855 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:04,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:04,856 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:04,890 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 17:57:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:05,073 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:05,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35869561] [2022-01-31 17:57:05,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [35869561] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:05,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:05,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:57:05,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625236726] [2022-01-31 17:57:05,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:05,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:57:05,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:05,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:57:05,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:57:05,075 INFO L87 Difference]: Start difference. First operand 272 states and 370 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 17:57:05,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:05,748 INFO L93 Difference]: Finished difference Result 534 states and 744 transitions. [2022-01-31 17:57:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:57:05,749 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 207 [2022-01-31 17:57:05,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:05,750 INFO L225 Difference]: With dead ends: 534 [2022-01-31 17:57:05,750 INFO L226 Difference]: Without dead ends: 301 [2022-01-31 17:57:05,751 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 17:57:05,752 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 879 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:05,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 33 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:57:05,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-31 17:57:05,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 288. [2022-01-31 17:57:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 283 states have (on average 1.3710247349823321) internal successors, (388), 283 states have internal predecessors, (388), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:05,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 392 transitions. [2022-01-31 17:57:05,810 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 392 transitions. Word has length 207 [2022-01-31 17:57:05,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:05,810 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 392 transitions. [2022-01-31 17:57:05,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 17:57:05,811 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 392 transitions. [2022-01-31 17:57:05,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 17:57:05,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:05,813 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:05,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:57:05,813 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:05,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:05,813 INFO L85 PathProgramCache]: Analyzing trace with hash 901143916, now seen corresponding path program 16 times [2022-01-31 17:57:05,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:05,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588225383] [2022-01-31 17:57:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:05,816 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:05,816 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:05,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:05,818 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:06,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:06,066 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:06,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588225383] [2022-01-31 17:57:06,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [588225383] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:06,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:06,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:57:06,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670476272] [2022-01-31 17:57:06,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:06,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:57:06,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:06,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:57:06,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:57:06,068 INFO L87 Difference]: Start difference. First operand 288 states and 392 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:06,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:06,736 INFO L93 Difference]: Finished difference Result 564 states and 786 transitions. [2022-01-31 17:57:06,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:57:06,736 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-01-31 17:57:06,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:06,738 INFO L225 Difference]: With dead ends: 564 [2022-01-31 17:57:06,738 INFO L226 Difference]: Without dead ends: 317 [2022-01-31 17:57:06,739 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 17:57:06,739 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1011 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:06,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1011 Valid, 33 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:57:06,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-01-31 17:57:06,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 304. [2022-01-31 17:57:06,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 299 states have (on average 1.37123745819398) internal successors, (410), 299 states have internal predecessors, (410), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:06,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 414 transitions. [2022-01-31 17:57:06,783 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 414 transitions. Word has length 219 [2022-01-31 17:57:06,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:06,784 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 414 transitions. [2022-01-31 17:57:06,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:06,784 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 414 transitions. [2022-01-31 17:57:06,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 17:57:06,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:06,786 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:06,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:57:06,786 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:06,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:06,787 INFO L85 PathProgramCache]: Analyzing trace with hash 128678989, now seen corresponding path program 17 times [2022-01-31 17:57:06,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:06,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838561568] [2022-01-31 17:57:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:06,789 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:06,789 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:06,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:06,791 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:07,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:07,039 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:07,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838561568] [2022-01-31 17:57:07,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [838561568] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:07,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:07,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:57:07,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124864990] [2022-01-31 17:57:07,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:07,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:57:07,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:07,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:57:07,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:57:07,041 INFO L87 Difference]: Start difference. First operand 304 states and 414 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:07,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:07,709 INFO L93 Difference]: Finished difference Result 594 states and 828 transitions. [2022-01-31 17:57:07,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:57:07,709 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 231 [2022-01-31 17:57:07,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:07,710 INFO L225 Difference]: With dead ends: 594 [2022-01-31 17:57:07,711 INFO L226 Difference]: Without dead ends: 333 [2022-01-31 17:57:07,712 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 17:57:07,712 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 961 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:07,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [961 Valid, 33 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:57:07,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-31 17:57:07,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 320. [2022-01-31 17:57:07,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.3714285714285714) internal successors, (432), 315 states have internal predecessors, (432), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:07,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 436 transitions. [2022-01-31 17:57:07,757 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 436 transitions. Word has length 231 [2022-01-31 17:57:07,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:07,757 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 436 transitions. [2022-01-31 17:57:07,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:07,757 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 436 transitions. [2022-01-31 17:57:07,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 17:57:07,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:07,758 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:07,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:57:07,759 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:07,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:07,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1307823816, now seen corresponding path program 18 times [2022-01-31 17:57:07,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:07,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078318015] [2022-01-31 17:57:07,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:07,761 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:07,761 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:07,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:07,763 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:08,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:08,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:08,014 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:08,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078318015] [2022-01-31 17:57:08,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2078318015] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:08,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:08,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:57:08,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670431680] [2022-01-31 17:57:08,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:08,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:57:08,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:08,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:57:08,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:57:08,016 INFO L87 Difference]: Start difference. First operand 320 states and 436 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 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 17:57:08,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:08,761 INFO L93 Difference]: Finished difference Result 624 states and 870 transitions. [2022-01-31 17:57:08,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:57:08,763 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 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 243 [2022-01-31 17:57:08,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:08,764 INFO L225 Difference]: With dead ends: 624 [2022-01-31 17:57:08,764 INFO L226 Difference]: Without dead ends: 349 [2022-01-31 17:57:08,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:57:08,766 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1041 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1041 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:08,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1041 Valid, 43 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:57:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-31 17:57:08,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 336. [2022-01-31 17:57:08,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 331 states have (on average 1.3716012084592144) internal successors, (454), 331 states have internal predecessors, (454), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:08,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 458 transitions. [2022-01-31 17:57:08,821 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 458 transitions. Word has length 243 [2022-01-31 17:57:08,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:08,821 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 458 transitions. [2022-01-31 17:57:08,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 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 17:57:08,821 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 458 transitions. [2022-01-31 17:57:08,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-31 17:57:08,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:08,823 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:08,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:57:08,823 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:08,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:08,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1171621737, now seen corresponding path program 19 times [2022-01-31 17:57:08,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:08,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172434004] [2022-01-31 17:57:08,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:08,825 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:08,825 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:08,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:08,827 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:09,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:09,086 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:09,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172434004] [2022-01-31 17:57:09,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1172434004] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:09,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:09,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:57:09,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004178609] [2022-01-31 17:57:09,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:09,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:57:09,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:09,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:57:09,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:57:09,087 INFO L87 Difference]: Start difference. First operand 336 states and 458 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:09,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:09,846 INFO L93 Difference]: Finished difference Result 654 states and 912 transitions. [2022-01-31 17:57:09,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:57:09,846 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2022-01-31 17:57:09,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:09,848 INFO L225 Difference]: With dead ends: 654 [2022-01-31 17:57:09,848 INFO L226 Difference]: Without dead ends: 365 [2022-01-31 17:57:09,849 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 17:57:09,849 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 887 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:09,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 58 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:57:09,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-01-31 17:57:09,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 352. [2022-01-31 17:57:09,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 347 states have (on average 1.3717579250720462) internal successors, (476), 347 states have internal predecessors, (476), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:09,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 480 transitions. [2022-01-31 17:57:09,907 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 480 transitions. Word has length 255 [2022-01-31 17:57:09,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:09,907 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 480 transitions. [2022-01-31 17:57:09,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:09,908 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 480 transitions. [2022-01-31 17:57:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-31 17:57:09,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:09,909 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:09,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:57:09,909 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:09,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:09,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1853096412, now seen corresponding path program 20 times [2022-01-31 17:57:09,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:09,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96555112] [2022-01-31 17:57:09,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:09,912 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:09,912 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:09,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:09,914 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:10,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:10,194 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:10,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96555112] [2022-01-31 17:57:10,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [96555112] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:10,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:10,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:57:10,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849351573] [2022-01-31 17:57:10,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:10,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:57:10,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:10,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:57:10,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:57:10,195 INFO L87 Difference]: Start difference. First operand 352 states and 480 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:10,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:10,977 INFO L93 Difference]: Finished difference Result 684 states and 954 transitions. [2022-01-31 17:57:10,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:57:10,977 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2022-01-31 17:57:10,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:10,978 INFO L225 Difference]: With dead ends: 684 [2022-01-31 17:57:10,979 INFO L226 Difference]: Without dead ends: 381 [2022-01-31 17:57:10,980 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 17:57:10,980 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1019 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1019 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:10,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1019 Valid, 48 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:57:10,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-01-31 17:57:11,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 368. [2022-01-31 17:57:11,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 363 states have (on average 1.371900826446281) internal successors, (498), 363 states have internal predecessors, (498), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:11,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 502 transitions. [2022-01-31 17:57:11,045 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 502 transitions. Word has length 267 [2022-01-31 17:57:11,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:11,045 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 502 transitions. [2022-01-31 17:57:11,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:11,045 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 502 transitions. [2022-01-31 17:57:11,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-01-31 17:57:11,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:11,047 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:11,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:57:11,047 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:11,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:11,047 INFO L85 PathProgramCache]: Analyzing trace with hash -962330491, now seen corresponding path program 21 times [2022-01-31 17:57:11,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:11,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148697389] [2022-01-31 17:57:11,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:11,049 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:11,049 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:11,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:11,051 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:11,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:11,351 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:11,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148697389] [2022-01-31 17:57:11,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [148697389] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:11,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:11,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:57:11,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496879960] [2022-01-31 17:57:11,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:11,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:57:11,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:11,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:57:11,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:57:11,353 INFO L87 Difference]: Start difference. First operand 368 states and 502 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 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 17:57:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:12,170 INFO L93 Difference]: Finished difference Result 714 states and 996 transitions. [2022-01-31 17:57:12,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:57:12,170 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 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 279 [2022-01-31 17:57:12,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:12,172 INFO L225 Difference]: With dead ends: 714 [2022-01-31 17:57:12,172 INFO L226 Difference]: Without dead ends: 397 [2022-01-31 17:57:12,173 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 17:57:12,174 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1060 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1060 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:12,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1060 Valid, 48 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:57:12,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-01-31 17:57:12,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 384. [2022-01-31 17:57:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 379 states have (on average 1.3720316622691293) internal successors, (520), 379 states have internal predecessors, (520), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:12,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 524 transitions. [2022-01-31 17:57:12,243 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 524 transitions. Word has length 279 [2022-01-31 17:57:12,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:12,243 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 524 transitions. [2022-01-31 17:57:12,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 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 17:57:12,243 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 524 transitions. [2022-01-31 17:57:12,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 17:57:12,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:12,245 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:12,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:57:12,245 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:12,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:12,246 INFO L85 PathProgramCache]: Analyzing trace with hash -329389184, now seen corresponding path program 22 times [2022-01-31 17:57:12,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:12,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654324757] [2022-01-31 17:57:12,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:12,248 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:12,248 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:12,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:12,250 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:12,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:12,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:12,579 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:12,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654324757] [2022-01-31 17:57:12,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [654324757] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:12,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:12,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:57:12,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702231064] [2022-01-31 17:57:12,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:12,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:57:12,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:12,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:57:12,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:57:12,582 INFO L87 Difference]: Start difference. First operand 384 states and 524 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:13,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:13,547 INFO L93 Difference]: Finished difference Result 744 states and 1038 transitions. [2022-01-31 17:57:13,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:57:13,548 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 291 [2022-01-31 17:57:13,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:13,550 INFO L225 Difference]: With dead ends: 744 [2022-01-31 17:57:13,550 INFO L226 Difference]: Without dead ends: 413 [2022-01-31 17:57:13,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:57:13,551 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1491 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1491 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:13,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1491 Valid, 43 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:57:13,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-01-31 17:57:13,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 400. [2022-01-31 17:57:13,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 395 states have (on average 1.3721518987341772) internal successors, (542), 395 states have internal predecessors, (542), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:13,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 546 transitions. [2022-01-31 17:57:13,626 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 546 transitions. Word has length 291 [2022-01-31 17:57:13,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:13,626 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 546 transitions. [2022-01-31 17:57:13,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:13,626 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 546 transitions. [2022-01-31 17:57:13,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-01-31 17:57:13,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:13,628 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:13,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:57:13,628 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:13,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:13,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1553864799, now seen corresponding path program 23 times [2022-01-31 17:57:13,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:13,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601649158] [2022-01-31 17:57:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:13,631 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:13,631 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:13,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:13,633 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:14,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:14,030 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:14,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601649158] [2022-01-31 17:57:14,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [601649158] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:14,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:14,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:57:14,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149513201] [2022-01-31 17:57:14,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:14,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:57:14,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:14,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:57:14,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:57:14,032 INFO L87 Difference]: Start difference. First operand 400 states and 546 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:14,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:14,941 INFO L93 Difference]: Finished difference Result 774 states and 1080 transitions. [2022-01-31 17:57:14,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:57:14,941 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 303 [2022-01-31 17:57:14,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:14,943 INFO L225 Difference]: With dead ends: 774 [2022-01-31 17:57:14,943 INFO L226 Difference]: Without dead ends: 429 [2022-01-31 17:57:14,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:57:14,945 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1311 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1311 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:14,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1311 Valid, 38 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:57:14,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-31 17:57:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 416. [2022-01-31 17:57:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 411 states have (on average 1.3722627737226278) internal successors, (564), 411 states have internal predecessors, (564), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 568 transitions. [2022-01-31 17:57:15,017 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 568 transitions. Word has length 303 [2022-01-31 17:57:15,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:15,017 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 568 transitions. [2022-01-31 17:57:15,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:15,018 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 568 transitions. [2022-01-31 17:57:15,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-01-31 17:57:15,028 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:15,029 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:15,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:57:15,029 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:15,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:15,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1068984612, now seen corresponding path program 24 times [2022-01-31 17:57:15,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:15,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881433022] [2022-01-31 17:57:15,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:15,031 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:15,032 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:15,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:15,033 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:15,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:15,412 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:15,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881433022] [2022-01-31 17:57:15,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [881433022] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:15,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:15,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:57:15,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993511184] [2022-01-31 17:57:15,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:15,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:57:15,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:15,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:57:15,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:57:15,414 INFO L87 Difference]: Start difference. First operand 416 states and 568 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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 17:57:16,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:16,272 INFO L93 Difference]: Finished difference Result 804 states and 1122 transitions. [2022-01-31 17:57:16,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:57:16,272 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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 315 [2022-01-31 17:57:16,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:16,274 INFO L225 Difference]: With dead ends: 804 [2022-01-31 17:57:16,274 INFO L226 Difference]: Without dead ends: 445 [2022-01-31 17:57:16,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:57:16,276 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1638 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1638 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:16,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1638 Valid, 33 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:57:16,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-01-31 17:57:16,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 432. [2022-01-31 17:57:16,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 427 states have (on average 1.3723653395784543) internal successors, (586), 427 states have internal predecessors, (586), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:16,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 590 transitions. [2022-01-31 17:57:16,364 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 590 transitions. Word has length 315 [2022-01-31 17:57:16,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:16,364 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 590 transitions. [2022-01-31 17:57:16,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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 17:57:16,364 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 590 transitions. [2022-01-31 17:57:16,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-01-31 17:57:16,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:16,366 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:16,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:57:16,367 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:16,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:16,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1369817923, now seen corresponding path program 25 times [2022-01-31 17:57:16,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:16,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587383674] [2022-01-31 17:57:16,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:16,369 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:16,369 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:16,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:16,371 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:16,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:16,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:16,752 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:16,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587383674] [2022-01-31 17:57:16,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1587383674] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:16,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:16,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:57:16,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345752822] [2022-01-31 17:57:16,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:16,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:57:16,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:16,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:57:16,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:57:16,754 INFO L87 Difference]: Start difference. First operand 432 states and 590 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:17,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:17,664 INFO L93 Difference]: Finished difference Result 834 states and 1164 transitions. [2022-01-31 17:57:17,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:57:17,664 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 327 [2022-01-31 17:57:17,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:17,666 INFO L225 Difference]: With dead ends: 834 [2022-01-31 17:57:17,666 INFO L226 Difference]: Without dead ends: 461 [2022-01-31 17:57:17,668 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 17:57:17,668 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1523 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:17,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 38 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:57:17,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-31 17:57:17,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 448. [2022-01-31 17:57:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 443 states have (on average 1.3724604966139955) internal successors, (608), 443 states have internal predecessors, (608), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 612 transitions. [2022-01-31 17:57:17,759 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 612 transitions. Word has length 327 [2022-01-31 17:57:17,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:17,759 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 612 transitions. [2022-01-31 17:57:17,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:17,759 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 612 transitions. [2022-01-31 17:57:17,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-01-31 17:57:17,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:17,761 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:17,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:57:17,761 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:17,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:17,761 INFO L85 PathProgramCache]: Analyzing trace with hash -987037640, now seen corresponding path program 26 times [2022-01-31 17:57:17,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:17,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561970531] [2022-01-31 17:57:17,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:17,763 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:17,763 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:17,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:17,765 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:18,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:18,205 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:18,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561970531] [2022-01-31 17:57:18,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1561970531] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:18,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:18,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:57:18,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561441326] [2022-01-31 17:57:18,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:18,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:57:18,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:18,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:57:18,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:57:18,207 INFO L87 Difference]: Start difference. First operand 448 states and 612 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:19,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:19,367 INFO L93 Difference]: Finished difference Result 864 states and 1206 transitions. [2022-01-31 17:57:19,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:57:19,368 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 339 [2022-01-31 17:57:19,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:19,370 INFO L225 Difference]: With dead ends: 864 [2022-01-31 17:57:19,370 INFO L226 Difference]: Without dead ends: 477 [2022-01-31 17:57:19,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:57:19,372 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1707 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1707 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:19,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1707 Valid, 48 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:57:19,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-01-31 17:57:19,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 464. [2022-01-31 17:57:19,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 459 states have (on average 1.3725490196078431) internal successors, (630), 459 states have internal predecessors, (630), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:19,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 634 transitions. [2022-01-31 17:57:19,485 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 634 transitions. Word has length 339 [2022-01-31 17:57:19,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:19,485 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 634 transitions. [2022-01-31 17:57:19,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:19,485 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 634 transitions. [2022-01-31 17:57:19,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-01-31 17:57:19,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:19,487 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:19,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:57:19,488 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:19,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:19,488 INFO L85 PathProgramCache]: Analyzing trace with hash 316145625, now seen corresponding path program 27 times [2022-01-31 17:57:19,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:19,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796968395] [2022-01-31 17:57:19,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:19,491 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:19,491 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:19,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:19,493 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:19,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:19,969 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:19,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796968395] [2022-01-31 17:57:19,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [796968395] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:19,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:19,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:57:19,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264356077] [2022-01-31 17:57:19,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:19,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:57:19,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:19,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:57:19,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:57:19,971 INFO L87 Difference]: Start difference. First operand 464 states and 634 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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 17:57:20,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:20,955 INFO L93 Difference]: Finished difference Result 894 states and 1248 transitions. [2022-01-31 17:57:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:57:20,955 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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 351 [2022-01-31 17:57:20,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:20,956 INFO L225 Difference]: With dead ends: 894 [2022-01-31 17:57:20,957 INFO L226 Difference]: Without dead ends: 493 [2022-01-31 17:57:20,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:57:20,959 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1462 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:20,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1462 Valid, 48 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:57:20,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-31 17:57:21,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 480. [2022-01-31 17:57:21,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 475 states have (on average 1.3726315789473684) internal successors, (652), 475 states have internal predecessors, (652), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:21,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 656 transitions. [2022-01-31 17:57:21,061 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 656 transitions. Word has length 351 [2022-01-31 17:57:21,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:21,061 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 656 transitions. [2022-01-31 17:57:21,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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 17:57:21,061 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 656 transitions. [2022-01-31 17:57:21,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-01-31 17:57:21,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:21,063 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:21,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:57:21,064 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:21,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:21,064 INFO L85 PathProgramCache]: Analyzing trace with hash -387700844, now seen corresponding path program 28 times [2022-01-31 17:57:21,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:21,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580269969] [2022-01-31 17:57:21,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:21,066 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:21,066 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:21,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:21,069 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:21,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:21,529 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:21,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580269969] [2022-01-31 17:57:21,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [580269969] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:21,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:21,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:57:21,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380697991] [2022-01-31 17:57:21,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:21,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:57:21,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:21,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:57:21,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:57:21,531 INFO L87 Difference]: Start difference. First operand 480 states and 656 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:22,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:22,575 INFO L93 Difference]: Finished difference Result 924 states and 1290 transitions. [2022-01-31 17:57:22,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:57:22,575 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 363 [2022-01-31 17:57:22,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:22,577 INFO L225 Difference]: With dead ends: 924 [2022-01-31 17:57:22,577 INFO L226 Difference]: Without dead ends: 509 [2022-01-31 17:57:22,579 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 17:57:22,579 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1503 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1503 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:22,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1503 Valid, 38 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:57:22,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-31 17:57:22,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 496. [2022-01-31 17:57:22,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 491 states have (on average 1.3727087576374746) internal successors, (674), 491 states have internal predecessors, (674), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 678 transitions. [2022-01-31 17:57:22,684 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 678 transitions. Word has length 363 [2022-01-31 17:57:22,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:22,684 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 678 transitions. [2022-01-31 17:57:22,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:22,685 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 678 transitions. [2022-01-31 17:57:22,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-01-31 17:57:22,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:22,687 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:22,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:57:22,687 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:22,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:22,688 INFO L85 PathProgramCache]: Analyzing trace with hash -182046475, now seen corresponding path program 29 times [2022-01-31 17:57:22,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:22,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553003738] [2022-01-31 17:57:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:22,690 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:22,690 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:22,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:22,692 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:23,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:23,204 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 17:57:23,204 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:23,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553003738] [2022-01-31 17:57:23,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [553003738] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:23,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:23,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:57:23,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813638495] [2022-01-31 17:57:23,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:23,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:57:23,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:23,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:57:23,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:57:23,207 INFO L87 Difference]: Start difference. First operand 496 states and 678 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:24,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:24,417 INFO L93 Difference]: Finished difference Result 954 states and 1332 transitions. [2022-01-31 17:57:24,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:57:24,417 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 375 [2022-01-31 17:57:24,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:24,419 INFO L225 Difference]: With dead ends: 954 [2022-01-31 17:57:24,419 INFO L226 Difference]: Without dead ends: 525 [2022-01-31 17:57:24,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:57:24,421 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1505 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:24,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1505 Valid, 53 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:57:24,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-01-31 17:57:24,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 512. [2022-01-31 17:57:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 507 states have (on average 1.3727810650887573) internal successors, (696), 507 states have internal predecessors, (696), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:24,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 700 transitions. [2022-01-31 17:57:24,550 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 700 transitions. Word has length 375 [2022-01-31 17:57:24,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:24,550 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 700 transitions. [2022-01-31 17:57:24,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:24,551 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 700 transitions. [2022-01-31 17:57:24,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-01-31 17:57:24,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:24,553 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:24,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:57:24,553 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:24,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:24,554 INFO L85 PathProgramCache]: Analyzing trace with hash 793971952, now seen corresponding path program 30 times [2022-01-31 17:57:24,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:24,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869738974] [2022-01-31 17:57:24,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:24,556 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:24,556 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:24,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:24,558 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:25,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:25,116 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:25,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869738974] [2022-01-31 17:57:25,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1869738974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:25,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:25,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:57:25,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814989323] [2022-01-31 17:57:25,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:25,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:57:25,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:25,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:57:25,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:57:25,118 INFO L87 Difference]: Start difference. First operand 512 states and 700 transitions. Second operand has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 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 17:57:26,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:26,344 INFO L93 Difference]: Finished difference Result 984 states and 1374 transitions. [2022-01-31 17:57:26,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:57:26,344 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 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 387 [2022-01-31 17:57:26,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:26,346 INFO L225 Difference]: With dead ends: 984 [2022-01-31 17:57:26,346 INFO L226 Difference]: Without dead ends: 541 [2022-01-31 17:57:26,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:57:26,348 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2430 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2430 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:26,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2430 Valid, 48 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:57:26,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-01-31 17:57:26,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 528. [2022-01-31 17:57:26,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 523 states have (on average 1.372848948374761) internal successors, (718), 523 states have internal predecessors, (718), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:26,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 722 transitions. [2022-01-31 17:57:26,478 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 722 transitions. Word has length 387 [2022-01-31 17:57:26,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:26,479 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 722 transitions. [2022-01-31 17:57:26,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 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 17:57:26,479 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 722 transitions. [2022-01-31 17:57:26,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-01-31 17:57:26,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:26,481 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:26,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:57:26,482 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:26,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:26,482 INFO L85 PathProgramCache]: Analyzing trace with hash 311414801, now seen corresponding path program 31 times [2022-01-31 17:57:26,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:26,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529705171] [2022-01-31 17:57:26,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:26,484 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:26,484 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:26,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:26,487 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:27,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:27,095 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:27,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529705171] [2022-01-31 17:57:27,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [529705171] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:27,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:27,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:57:27,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951413208] [2022-01-31 17:57:27,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:27,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:57:27,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:27,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:57:27,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:57:27,097 INFO L87 Difference]: Start difference. First operand 528 states and 722 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:28,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:28,324 INFO L93 Difference]: Finished difference Result 1014 states and 1416 transitions. [2022-01-31 17:57:28,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:57:28,324 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 399 [2022-01-31 17:57:28,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:28,326 INFO L225 Difference]: With dead ends: 1014 [2022-01-31 17:57:28,326 INFO L226 Difference]: Without dead ends: 557 [2022-01-31 17:57:28,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:57:28,327 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1639 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1639 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:28,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1639 Valid, 53 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:57:28,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-31 17:57:28,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 544. [2022-01-31 17:57:28,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 539 states have (on average 1.37291280148423) internal successors, (740), 539 states have internal predecessors, (740), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 744 transitions. [2022-01-31 17:57:28,465 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 744 transitions. Word has length 399 [2022-01-31 17:57:28,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:28,466 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 744 transitions. [2022-01-31 17:57:28,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 744 transitions. [2022-01-31 17:57:28,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-01-31 17:57:28,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:28,468 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:28,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:57:28,469 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:28,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:28,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1839812532, now seen corresponding path program 32 times [2022-01-31 17:57:28,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:28,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37116597] [2022-01-31 17:57:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:28,472 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:28,472 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:28,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:28,475 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:28,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:29,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:29,024 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:29,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37116597] [2022-01-31 17:57:29,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [37116597] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:29,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:29,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:57:29,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80585040] [2022-01-31 17:57:29,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:29,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:57:29,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:29,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:57:29,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:57:29,026 INFO L87 Difference]: Start difference. First operand 544 states and 744 transitions. Second operand has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:30,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:30,298 INFO L93 Difference]: Finished difference Result 1044 states and 1458 transitions. [2022-01-31 17:57:30,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:57:30,299 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 411 [2022-01-31 17:57:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:30,300 INFO L225 Difference]: With dead ends: 1044 [2022-01-31 17:57:30,300 INFO L226 Difference]: Without dead ends: 573 [2022-01-31 17:57:30,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:57:30,301 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2148 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2148 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:30,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2148 Valid, 38 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:57:30,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-01-31 17:57:30,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 560. [2022-01-31 17:57:30,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 555 states have (on average 1.372972972972973) internal successors, (762), 555 states have internal predecessors, (762), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:30,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 766 transitions. [2022-01-31 17:57:30,452 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 766 transitions. Word has length 411 [2022-01-31 17:57:30,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:30,453 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 766 transitions. [2022-01-31 17:57:30,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:30,453 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 766 transitions. [2022-01-31 17:57:30,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2022-01-31 17:57:30,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:30,455 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:30,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:57:30,456 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:30,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:30,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1633672493, now seen corresponding path program 33 times [2022-01-31 17:57:30,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:30,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060496500] [2022-01-31 17:57:30,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:30,459 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:30,459 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:30,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:30,462 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:31,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:31,036 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:31,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060496500] [2022-01-31 17:57:31,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1060496500] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:31,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:31,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:57:31,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729063973] [2022-01-31 17:57:31,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:31,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:57:31,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:31,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:57:31,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:57:31,038 INFO L87 Difference]: Start difference. First operand 560 states and 766 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 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 17:57:32,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:32,358 INFO L93 Difference]: Finished difference Result 1074 states and 1500 transitions. [2022-01-31 17:57:32,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:57:32,358 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 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 423 [2022-01-31 17:57:32,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:32,360 INFO L225 Difference]: With dead ends: 1074 [2022-01-31 17:57:32,360 INFO L226 Difference]: Without dead ends: 589 [2022-01-31 17:57:32,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:57:32,361 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1721 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1721 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:32,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1721 Valid, 58 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:57:32,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-31 17:57:32,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 576. [2022-01-31 17:57:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 571 states have (on average 1.3730297723292468) internal successors, (784), 571 states have internal predecessors, (784), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:32,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 788 transitions. [2022-01-31 17:57:32,539 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 788 transitions. Word has length 423 [2022-01-31 17:57:32,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:32,539 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 788 transitions. [2022-01-31 17:57:32,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 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 17:57:32,539 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 788 transitions. [2022-01-31 17:57:32,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-01-31 17:57:32,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:32,542 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:32,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:57:32,542 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:32,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:32,543 INFO L85 PathProgramCache]: Analyzing trace with hash -506588760, now seen corresponding path program 34 times [2022-01-31 17:57:32,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:32,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423280963] [2022-01-31 17:57:32,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:32,545 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:32,545 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:32,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:32,548 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:33,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:33,165 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:33,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423280963] [2022-01-31 17:57:33,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [423280963] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:33,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:33,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:57:33,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440763988] [2022-01-31 17:57:33,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:33,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:57:33,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:33,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:57:33,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:57:33,167 INFO L87 Difference]: Start difference. First operand 576 states and 788 transitions. Second operand has 39 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:34,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:34,535 INFO L93 Difference]: Finished difference Result 1104 states and 1542 transitions. [2022-01-31 17:57:34,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:57:34,535 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 435 [2022-01-31 17:57:34,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:34,537 INFO L225 Difference]: With dead ends: 1104 [2022-01-31 17:57:34,537 INFO L226 Difference]: Without dead ends: 605 [2022-01-31 17:57:34,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:57:34,539 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2074 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2074 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:34,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2074 Valid, 38 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:57:34,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-01-31 17:57:34,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 592. [2022-01-31 17:57:34,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 587 states have (on average 1.373083475298126) internal successors, (806), 587 states have internal predecessors, (806), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:34,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 810 transitions. [2022-01-31 17:57:34,681 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 810 transitions. Word has length 435 [2022-01-31 17:57:34,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:34,681 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 810 transitions. [2022-01-31 17:57:34,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:34,681 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 810 transitions. [2022-01-31 17:57:34,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-01-31 17:57:34,684 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:34,684 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:34,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:57:34,684 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:34,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:34,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1327409079, now seen corresponding path program 35 times [2022-01-31 17:57:34,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:34,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807520266] [2022-01-31 17:57:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:34,687 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:34,687 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:34,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:34,690 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:35,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:35,324 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:35,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807520266] [2022-01-31 17:57:35,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1807520266] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:35,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:35,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:57:35,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829049911] [2022-01-31 17:57:35,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:35,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:57:35,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:35,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:57:35,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:57:35,326 INFO L87 Difference]: Start difference. First operand 592 states and 810 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:36,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:36,788 INFO L93 Difference]: Finished difference Result 1134 states and 1584 transitions. [2022-01-31 17:57:36,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:57:36,788 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 447 [2022-01-31 17:57:36,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:36,790 INFO L225 Difference]: With dead ends: 1134 [2022-01-31 17:57:36,791 INFO L226 Difference]: Without dead ends: 621 [2022-01-31 17:57:36,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:57:36,792 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2271 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2271 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:36,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2271 Valid, 38 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:57:36,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-01-31 17:57:36,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 608. [2022-01-31 17:57:36,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 603 states have (on average 1.373134328358209) internal successors, (828), 603 states have internal predecessors, (828), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:36,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 832 transitions. [2022-01-31 17:57:36,924 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 832 transitions. Word has length 447 [2022-01-31 17:57:36,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:36,924 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 832 transitions. [2022-01-31 17:57:36,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:36,925 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 832 transitions. [2022-01-31 17:57:36,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2022-01-31 17:57:36,927 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:36,928 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:36,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:57:36,928 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:36,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:36,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1550307068, now seen corresponding path program 36 times [2022-01-31 17:57:36,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:36,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754288360] [2022-01-31 17:57:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:36,931 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:36,931 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:36,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:36,934 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:37,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:37,581 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:37,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754288360] [2022-01-31 17:57:37,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1754288360] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:37,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:37,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:57:37,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337276202] [2022-01-31 17:57:37,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:37,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:57:37,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:37,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:57:37,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:57:37,583 INFO L87 Difference]: Start difference. First operand 608 states and 832 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:39,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:39,074 INFO L93 Difference]: Finished difference Result 1164 states and 1626 transitions. [2022-01-31 17:57:39,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:57:39,074 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 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 459 [2022-01-31 17:57:39,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:39,076 INFO L225 Difference]: With dead ends: 1164 [2022-01-31 17:57:39,076 INFO L226 Difference]: Without dead ends: 637 [2022-01-31 17:57:39,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:57:39,077 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2325 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2325 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:39,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2325 Valid, 38 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:57:39,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-01-31 17:57:39,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 624. [2022-01-31 17:57:39,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 619 states have (on average 1.3731825525040389) internal successors, (850), 619 states have internal predecessors, (850), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:39,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 854 transitions. [2022-01-31 17:57:39,217 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 854 transitions. Word has length 459 [2022-01-31 17:57:39,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:39,217 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 854 transitions. [2022-01-31 17:57:39,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:39,217 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 854 transitions. [2022-01-31 17:57:39,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2022-01-31 17:57:39,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:39,220 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:39,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:57:39,220 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:39,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:39,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1230979429, now seen corresponding path program 37 times [2022-01-31 17:57:39,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:39,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498098431] [2022-01-31 17:57:39,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:39,223 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:39,223 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:39,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:39,225 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:40,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:40,017 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:40,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498098431] [2022-01-31 17:57:40,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [498098431] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:40,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:40,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:57:40,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023247097] [2022-01-31 17:57:40,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:40,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:57:40,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:40,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:57:40,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:57:40,022 INFO L87 Difference]: Start difference. First operand 624 states and 854 transitions. Second operand has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:41,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:41,573 INFO L93 Difference]: Finished difference Result 1194 states and 1668 transitions. [2022-01-31 17:57:41,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:57:41,573 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 471 [2022-01-31 17:57:41,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:41,575 INFO L225 Difference]: With dead ends: 1194 [2022-01-31 17:57:41,575 INFO L226 Difference]: Without dead ends: 653 [2022-01-31 17:57:41,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:57:41,577 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2054 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2054 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:41,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2054 Valid, 48 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:57:41,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-01-31 17:57:41,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 640. [2022-01-31 17:57:41,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 635 states have (on average 1.373228346456693) internal successors, (872), 635 states have internal predecessors, (872), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:41,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 876 transitions. [2022-01-31 17:57:41,741 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 876 transitions. Word has length 471 [2022-01-31 17:57:41,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:41,742 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 876 transitions. [2022-01-31 17:57:41,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:41,742 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 876 transitions. [2022-01-31 17:57:41,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-01-31 17:57:41,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:41,745 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:41,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:57:41,745 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:41,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:41,745 INFO L85 PathProgramCache]: Analyzing trace with hash -208400800, now seen corresponding path program 38 times [2022-01-31 17:57:41,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:41,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211262694] [2022-01-31 17:57:41,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:41,748 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:41,748 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:41,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:41,751 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:42,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:42,466 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:42,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211262694] [2022-01-31 17:57:42,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1211262694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:42,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:42,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:57:42,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845477509] [2022-01-31 17:57:42,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:42,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:57:42,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:42,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:57:42,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:57:42,468 INFO L87 Difference]: Start difference. First operand 640 states and 876 transitions. Second operand has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 42 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:44,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:44,115 INFO L93 Difference]: Finished difference Result 1224 states and 1710 transitions. [2022-01-31 17:57:44,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:57:44,115 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 42 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 483 [2022-01-31 17:57:44,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:44,117 INFO L225 Difference]: With dead ends: 1224 [2022-01-31 17:57:44,117 INFO L226 Difference]: Without dead ends: 669 [2022-01-31 17:57:44,119 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 17:57:44,119 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2927 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2927 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:44,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2927 Valid, 43 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:57:44,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-31 17:57:44,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 656. [2022-01-31 17:57:44,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 651 states have (on average 1.3732718894009217) internal successors, (894), 651 states have internal predecessors, (894), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:44,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 898 transitions. [2022-01-31 17:57:44,333 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 898 transitions. Word has length 483 [2022-01-31 17:57:44,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:44,333 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 898 transitions. [2022-01-31 17:57:44,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 42 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:44,334 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 898 transitions. [2022-01-31 17:57:44,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2022-01-31 17:57:44,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:44,337 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:44,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:57:44,337 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:44,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:44,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1943758719, now seen corresponding path program 39 times [2022-01-31 17:57:44,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:44,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164470914] [2022-01-31 17:57:44,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:44,340 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:44,340 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:44,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:44,345 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:45,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:45,096 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:45,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164470914] [2022-01-31 17:57:45,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1164470914] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:45,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:45,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:57:45,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784965597] [2022-01-31 17:57:45,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:45,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:57:45,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:45,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:57:45,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:57:45,099 INFO L87 Difference]: Start difference. First operand 656 states and 898 transitions. Second operand has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:46,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:46,799 INFO L93 Difference]: Finished difference Result 1254 states and 1752 transitions. [2022-01-31 17:57:46,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:57:46,799 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 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 495 [2022-01-31 17:57:46,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:46,801 INFO L225 Difference]: With dead ends: 1254 [2022-01-31 17:57:46,801 INFO L226 Difference]: Without dead ends: 685 [2022-01-31 17:57:46,802 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 17:57:46,802 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2695 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2695 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:46,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2695 Valid, 38 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:57:46,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-01-31 17:57:46,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 672. [2022-01-31 17:57:46,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 667 states have (on average 1.3733133433283358) internal successors, (916), 667 states have internal predecessors, (916), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:46,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 920 transitions. [2022-01-31 17:57:46,961 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 920 transitions. Word has length 495 [2022-01-31 17:57:46,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:46,962 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 920 transitions. [2022-01-31 17:57:46,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:46,962 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 920 transitions. [2022-01-31 17:57:46,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2022-01-31 17:57:46,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:46,965 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:46,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:57:46,965 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:46,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:46,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1671473596, now seen corresponding path program 40 times [2022-01-31 17:57:46,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:46,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861760329] [2022-01-31 17:57:46,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:46,968 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:46,968 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:46,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:46,972 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:47,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:47,819 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:47,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861760329] [2022-01-31 17:57:47,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1861760329] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:47,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:47,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:57:47,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782983955] [2022-01-31 17:57:47,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:47,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:57:47,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:47,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:57:47,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:57:47,820 INFO L87 Difference]: Start difference. First operand 672 states and 920 transitions. Second operand has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 44 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:49,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:49,547 INFO L93 Difference]: Finished difference Result 1284 states and 1794 transitions. [2022-01-31 17:57:49,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:57:49,547 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 44 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 507 [2022-01-31 17:57:49,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:49,549 INFO L225 Difference]: With dead ends: 1284 [2022-01-31 17:57:49,549 INFO L226 Difference]: Without dead ends: 701 [2022-01-31 17:57:49,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:57:49,550 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2073 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2073 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:49,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2073 Valid, 53 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:57:49,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-01-31 17:57:49,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 688. [2022-01-31 17:57:49,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 683 states have (on average 1.3733528550512446) internal successors, (938), 683 states have internal predecessors, (938), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:49,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 942 transitions. [2022-01-31 17:57:49,713 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 942 transitions. Word has length 507 [2022-01-31 17:57:49,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:49,713 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 942 transitions. [2022-01-31 17:57:49,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 44 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:49,714 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 942 transitions. [2022-01-31 17:57:49,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-01-31 17:57:49,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:49,717 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:49,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:57:49,717 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:49,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:49,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1820566115, now seen corresponding path program 41 times [2022-01-31 17:57:49,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:49,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046639297] [2022-01-31 17:57:49,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:49,720 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:49,721 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:49,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:49,724 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:50,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:50,501 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:50,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046639297] [2022-01-31 17:57:50,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2046639297] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:50,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:50,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:57:50,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000042558] [2022-01-31 17:57:50,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:50,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:57:50,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:50,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:57:50,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:57:50,503 INFO L87 Difference]: Start difference. First operand 688 states and 942 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:52,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:52,401 INFO L93 Difference]: Finished difference Result 1314 states and 1836 transitions. [2022-01-31 17:57:52,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:57:52,402 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 519 [2022-01-31 17:57:52,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:52,404 INFO L225 Difference]: With dead ends: 1314 [2022-01-31 17:57:52,404 INFO L226 Difference]: Without dead ends: 717 [2022-01-31 17:57:52,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:57:52,405 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2816 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2816 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:52,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2816 Valid, 43 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:57:52,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-01-31 17:57:52,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 704. [2022-01-31 17:57:52,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 699 states have (on average 1.3733905579399142) internal successors, (960), 699 states have internal predecessors, (960), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:52,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 964 transitions. [2022-01-31 17:57:52,573 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 964 transitions. Word has length 519 [2022-01-31 17:57:52,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:52,573 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 964 transitions. [2022-01-31 17:57:52,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:52,573 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 964 transitions. [2022-01-31 17:57:52,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2022-01-31 17:57:52,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:52,576 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:52,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:57:52,576 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:52,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:52,576 INFO L85 PathProgramCache]: Analyzing trace with hash -610467048, now seen corresponding path program 42 times [2022-01-31 17:57:52,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:52,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568019132] [2022-01-31 17:57:52,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:52,579 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:52,579 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:52,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:52,583 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:53,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:53,438 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:53,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568019132] [2022-01-31 17:57:53,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [568019132] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:53,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:53,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:57:53,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889519502] [2022-01-31 17:57:53,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:53,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:57:53,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:53,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:57:53,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:57:53,439 INFO L87 Difference]: Start difference. First operand 704 states and 964 transitions. Second operand has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 46 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:55,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:55,399 INFO L93 Difference]: Finished difference Result 1344 states and 1878 transitions. [2022-01-31 17:57:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:57:55,399 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 46 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 531 [2022-01-31 17:57:55,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:55,402 INFO L225 Difference]: With dead ends: 1344 [2022-01-31 17:57:55,402 INFO L226 Difference]: Without dead ends: 733 [2022-01-31 17:57:55,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:57:55,404 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2402 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2402 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:55,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2402 Valid, 48 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:57:55,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-01-31 17:57:55,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 720. [2022-01-31 17:57:55,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 715 states have (on average 1.3734265734265734) internal successors, (982), 715 states have internal predecessors, (982), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:55,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 986 transitions. [2022-01-31 17:57:55,590 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 986 transitions. Word has length 531 [2022-01-31 17:57:55,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:55,590 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 986 transitions. [2022-01-31 17:57:55,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 46 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:55,591 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 986 transitions. [2022-01-31 17:57:55,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2022-01-31 17:57:55,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:55,593 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:55,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:57:55,593 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:55,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:55,594 INFO L85 PathProgramCache]: Analyzing trace with hash -760115015, now seen corresponding path program 43 times [2022-01-31 17:57:55,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:55,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847718112] [2022-01-31 17:57:55,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:55,596 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:55,596 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:55,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:55,600 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:56,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:56,434 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:56,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847718112] [2022-01-31 17:57:56,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [847718112] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:56,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:56,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:57:56,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033163737] [2022-01-31 17:57:56,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:56,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:57:56,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:56,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:57:56,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:57:56,446 INFO L87 Difference]: Start difference. First operand 720 states and 986 transitions. Second operand has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:58,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:58,406 INFO L93 Difference]: Finished difference Result 1374 states and 1920 transitions. [2022-01-31 17:57:58,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:57:58,406 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 543 [2022-01-31 17:57:58,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:58,408 INFO L225 Difference]: With dead ends: 1374 [2022-01-31 17:57:58,408 INFO L226 Difference]: Without dead ends: 749 [2022-01-31 17:57:58,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:57:58,410 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2495 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2495 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:58,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2495 Valid, 43 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:57:58,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-31 17:57:58,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 736. [2022-01-31 17:57:58,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 731 states have (on average 1.3734610123119015) internal successors, (1004), 731 states have internal predecessors, (1004), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:58,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1008 transitions. [2022-01-31 17:57:58,592 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1008 transitions. Word has length 543 [2022-01-31 17:57:58,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:58,592 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 1008 transitions. [2022-01-31 17:57:58,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:58,592 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1008 transitions. [2022-01-31 17:57:58,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2022-01-31 17:57:58,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:58,595 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:58,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:57:58,595 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:58,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:58,595 INFO L85 PathProgramCache]: Analyzing trace with hash 2036865652, now seen corresponding path program 44 times [2022-01-31 17:57:58,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:58,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491375634] [2022-01-31 17:57:58,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:58,597 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:58,597 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:58,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:58,601 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:59,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:59,511 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:59,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491375634] [2022-01-31 17:57:59,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [491375634] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:59,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:59,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:57:59,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649240525] [2022-01-31 17:57:59,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:59,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:57:59,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:59,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:57:59,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:57:59,513 INFO L87 Difference]: Start difference. First operand 736 states and 1008 transitions. Second operand has 49 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 48 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:01,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:01,642 INFO L93 Difference]: Finished difference Result 1404 states and 1962 transitions. [2022-01-31 17:58:01,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:58:01,642 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 48 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 555 [2022-01-31 17:58:01,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:01,644 INFO L225 Difference]: With dead ends: 1404 [2022-01-31 17:58:01,644 INFO L226 Difference]: Without dead ends: 765 [2022-01-31 17:58:01,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:58:01,645 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2874 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2874 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:01,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2874 Valid, 43 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:58:01,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-01-31 17:58:01,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 752. [2022-01-31 17:58:01,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 747 states have (on average 1.3734939759036144) internal successors, (1026), 747 states have internal predecessors, (1026), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:01,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1030 transitions. [2022-01-31 17:58:01,838 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1030 transitions. Word has length 555 [2022-01-31 17:58:01,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:01,838 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 1030 transitions. [2022-01-31 17:58:01,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 48 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:01,838 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1030 transitions. [2022-01-31 17:58:01,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2022-01-31 17:58:01,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:01,841 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:01,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:58:01,841 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:01,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:01,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1240518187, now seen corresponding path program 45 times [2022-01-31 17:58:01,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:01,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006643072] [2022-01-31 17:58:01,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:01,843 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:01,843 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:01,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:01,846 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:02,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:02,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:02,765 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:02,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006643072] [2022-01-31 17:58:02,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2006643072] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:02,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:02,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:58:02,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646937393] [2022-01-31 17:58:02,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:02,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:58:02,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:02,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:58:02,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:58:02,767 INFO L87 Difference]: Start difference. First operand 752 states and 1030 transitions. Second operand has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 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 17:58:04,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:04,934 INFO L93 Difference]: Finished difference Result 1434 states and 2004 transitions. [2022-01-31 17:58:04,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:58:04,935 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 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 567 [2022-01-31 17:58:04,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:04,937 INFO L225 Difference]: With dead ends: 1434 [2022-01-31 17:58:04,937 INFO L226 Difference]: Without dead ends: 781 [2022-01-31 17:58:04,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:58:04,938 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2837 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2837 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:04,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2837 Valid, 38 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:58:04,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-01-31 17:58:05,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 768. [2022-01-31 17:58:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 763 states have (on average 1.3735255570117955) internal successors, (1048), 763 states have internal predecessors, (1048), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1052 transitions. [2022-01-31 17:58:05,136 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1052 transitions. Word has length 567 [2022-01-31 17:58:05,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:05,136 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 1052 transitions. [2022-01-31 17:58:05,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 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 17:58:05,136 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1052 transitions. [2022-01-31 17:58:05,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2022-01-31 17:58:05,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:05,139 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:05,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:58:05,139 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:05,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:05,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1893789648, now seen corresponding path program 46 times [2022-01-31 17:58:05,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:05,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476910099] [2022-01-31 17:58:05,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:05,144 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:05,144 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:05,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:05,147 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:06,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:06,087 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:06,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476910099] [2022-01-31 17:58:06,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [476910099] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:06,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:06,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:58:06,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306577670] [2022-01-31 17:58:06,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:06,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:58:06,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:06,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:58:06,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:58:06,089 INFO L87 Difference]: Start difference. First operand 768 states and 1052 transitions. Second operand has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 50 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:08,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:08,352 INFO L93 Difference]: Finished difference Result 1464 states and 2046 transitions. [2022-01-31 17:58:08,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:58:08,352 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 50 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 579 [2022-01-31 17:58:08,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:08,355 INFO L225 Difference]: With dead ends: 1464 [2022-01-31 17:58:08,355 INFO L226 Difference]: Without dead ends: 797 [2022-01-31 17:58:08,357 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 17:58:08,357 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2527 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2527 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:08,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2527 Valid, 53 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:58:08,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-01-31 17:58:08,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 784. [2022-01-31 17:58:08,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 779 states have (on average 1.373555840821566) internal successors, (1070), 779 states have internal predecessors, (1070), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:08,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1074 transitions. [2022-01-31 17:58:08,662 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1074 transitions. Word has length 579 [2022-01-31 17:58:08,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:08,663 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 1074 transitions. [2022-01-31 17:58:08,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 50 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:08,663 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1074 transitions. [2022-01-31 17:58:08,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2022-01-31 17:58:08,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:08,667 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:08,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:58:08,667 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:08,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:08,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1121992945, now seen corresponding path program 47 times [2022-01-31 17:58:08,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:08,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068663496] [2022-01-31 17:58:08,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:08,671 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:08,671 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:08,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:08,675 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:09,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:09,712 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:09,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068663496] [2022-01-31 17:58:09,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1068663496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:09,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:09,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:58:09,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368894607] [2022-01-31 17:58:09,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:09,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:58:09,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:09,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:58:09,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:58:09,713 INFO L87 Difference]: Start difference. First operand 784 states and 1074 transitions. Second operand has 52 states, 52 states have (on average 2.25) internal successors, (117), 51 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:11,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:11,974 INFO L93 Difference]: Finished difference Result 1494 states and 2088 transitions. [2022-01-31 17:58:11,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:58:11,975 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.25) internal successors, (117), 51 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 591 [2022-01-31 17:58:11,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:11,977 INFO L225 Difference]: With dead ends: 1494 [2022-01-31 17:58:11,977 INFO L226 Difference]: Without dead ends: 813 [2022-01-31 17:58:11,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:58:11,978 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2841 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 475 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2841 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 475 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:11,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2841 Valid, 48 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [475 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:58:11,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-01-31 17:58:12,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 800. [2022-01-31 17:58:12,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 795 states have (on average 1.3735849056603773) internal successors, (1092), 795 states have internal predecessors, (1092), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:12,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1096 transitions. [2022-01-31 17:58:12,194 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1096 transitions. Word has length 591 [2022-01-31 17:58:12,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:12,194 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1096 transitions. [2022-01-31 17:58:12,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.25) internal successors, (117), 51 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:12,194 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1096 transitions. [2022-01-31 17:58:12,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2022-01-31 17:58:12,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:12,197 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:12,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:58:12,198 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:12,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:12,198 INFO L85 PathProgramCache]: Analyzing trace with hash -337214676, now seen corresponding path program 48 times [2022-01-31 17:58:12,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:12,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993888115] [2022-01-31 17:58:12,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:12,200 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:12,200 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:12,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:12,203 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:13,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:13,237 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:13,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993888115] [2022-01-31 17:58:13,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1993888115] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:13,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:13,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:58:13,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699754043] [2022-01-31 17:58:13,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:13,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:58:13,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:13,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:58:13,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:58:13,238 INFO L87 Difference]: Start difference. First operand 800 states and 1096 transitions. Second operand has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 52 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 17:58:15,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:15,573 INFO L93 Difference]: Finished difference Result 1524 states and 2130 transitions. [2022-01-31 17:58:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:58:15,574 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 52 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 603 [2022-01-31 17:58:15,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:15,576 INFO L225 Difference]: With dead ends: 1524 [2022-01-31 17:58:15,576 INFO L226 Difference]: Without dead ends: 829 [2022-01-31 17:58:15,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:58:15,577 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3025 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 504 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3025 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 504 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:15,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3025 Valid, 43 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [504 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:58:15,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-01-31 17:58:15,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 816. [2022-01-31 17:58:15,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 811 states have (on average 1.373612823674476) internal successors, (1114), 811 states have internal predecessors, (1114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:15,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1118 transitions. [2022-01-31 17:58:15,795 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1118 transitions. Word has length 603 [2022-01-31 17:58:15,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:15,795 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 1118 transitions. [2022-01-31 17:58:15,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 52 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 17:58:15,795 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1118 transitions. [2022-01-31 17:58:15,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2022-01-31 17:58:15,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:15,798 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:15,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:58:15,799 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:15,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:15,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1217413619, now seen corresponding path program 49 times [2022-01-31 17:58:15,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:15,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664765654] [2022-01-31 17:58:15,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:15,801 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:15,801 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:15,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:15,804 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:16,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:16,913 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:16,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664765654] [2022-01-31 17:58:16,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1664765654] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:16,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:16,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:58:16,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467302341] [2022-01-31 17:58:16,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:16,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:58:16,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:16,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:58:16,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:58:16,915 INFO L87 Difference]: Start difference. First operand 816 states and 1118 transitions. Second operand has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:19,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:19,325 INFO L93 Difference]: Finished difference Result 1554 states and 2172 transitions. [2022-01-31 17:58:19,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:58:19,326 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 615 [2022-01-31 17:58:19,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:19,328 INFO L225 Difference]: With dead ends: 1554 [2022-01-31 17:58:19,328 INFO L226 Difference]: Without dead ends: 845 [2022-01-31 17:58:19,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:58:19,329 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2975 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2975 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:19,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2975 Valid, 48 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:58:19,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-01-31 17:58:19,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 832. [2022-01-31 17:58:19,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 827 states have (on average 1.373639661426844) internal successors, (1136), 827 states have internal predecessors, (1136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:19,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1140 transitions. [2022-01-31 17:58:19,554 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1140 transitions. Word has length 615 [2022-01-31 17:58:19,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:19,554 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 1140 transitions. [2022-01-31 17:58:19,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:19,554 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1140 transitions. [2022-01-31 17:58:19,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2022-01-31 17:58:19,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:19,559 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:19,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:58:19,559 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:19,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:19,560 INFO L85 PathProgramCache]: Analyzing trace with hash -363342712, now seen corresponding path program 50 times [2022-01-31 17:58:19,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:19,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064002041] [2022-01-31 17:58:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:19,562 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:19,562 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:19,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:19,566 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:20,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:20,713 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:20,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064002041] [2022-01-31 17:58:20,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1064002041] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:20,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:20,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:58:20,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169987613] [2022-01-31 17:58:20,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:20,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:58:20,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:20,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:58:20,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:58:20,715 INFO L87 Difference]: Start difference. First operand 832 states and 1140 transitions. Second operand has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 54 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:23,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:23,240 INFO L93 Difference]: Finished difference Result 1584 states and 2214 transitions. [2022-01-31 17:58:23,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:58:23,241 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 54 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 627 [2022-01-31 17:58:23,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:23,243 INFO L225 Difference]: With dead ends: 1584 [2022-01-31 17:58:23,243 INFO L226 Difference]: Without dead ends: 861 [2022-01-31 17:58:23,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:58:23,244 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3692 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 608 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3692 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 608 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:23,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3692 Valid, 53 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [608 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:58:23,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-31 17:58:23,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 848. [2022-01-31 17:58:23,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 843 states have (on average 1.3736654804270463) internal successors, (1158), 843 states have internal predecessors, (1158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1162 transitions. [2022-01-31 17:58:23,493 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1162 transitions. Word has length 627 [2022-01-31 17:58:23,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:23,493 INFO L470 AbstractCegarLoop]: Abstraction has 848 states and 1162 transitions. [2022-01-31 17:58:23,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 54 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:23,493 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1162 transitions. [2022-01-31 17:58:23,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2022-01-31 17:58:23,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:23,496 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:23,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:58:23,496 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:23,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:23,497 INFO L85 PathProgramCache]: Analyzing trace with hash 721987881, now seen corresponding path program 51 times [2022-01-31 17:58:23,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:23,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708591051] [2022-01-31 17:58:23,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:23,499 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:23,499 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:23,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:23,503 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:24,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:24,678 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:24,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708591051] [2022-01-31 17:58:24,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [708591051] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:24,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:24,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:58:24,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106608777] [2022-01-31 17:58:24,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:24,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:58:24,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:24,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:58:24,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:58:24,680 INFO L87 Difference]: Start difference. First operand 848 states and 1162 transitions. Second operand has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 55 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 17:58:27,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:27,323 INFO L93 Difference]: Finished difference Result 1614 states and 2256 transitions. [2022-01-31 17:58:27,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:58:27,324 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 55 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 639 [2022-01-31 17:58:27,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:27,326 INFO L225 Difference]: With dead ends: 1614 [2022-01-31 17:58:27,326 INFO L226 Difference]: Without dead ends: 877 [2022-01-31 17:58:27,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:58:27,327 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3070 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 511 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3070 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 511 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:27,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3070 Valid, 63 Invalid, 1480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [511 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:58:27,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-01-31 17:58:27,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 864. [2022-01-31 17:58:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 859 states have (on average 1.3736903376018625) internal successors, (1180), 859 states have internal predecessors, (1180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:27,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1184 transitions. [2022-01-31 17:58:27,567 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1184 transitions. Word has length 639 [2022-01-31 17:58:27,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:27,567 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 1184 transitions. [2022-01-31 17:58:27,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 55 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 17:58:27,567 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1184 transitions. [2022-01-31 17:58:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2022-01-31 17:58:27,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:27,571 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:27,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:58:27,571 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:27,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:27,571 INFO L85 PathProgramCache]: Analyzing trace with hash 571728868, now seen corresponding path program 52 times [2022-01-31 17:58:27,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:27,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278724727] [2022-01-31 17:58:27,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:27,574 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:27,574 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:27,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:27,578 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:28,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:28,791 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:28,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278724727] [2022-01-31 17:58:28,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [278724727] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:28,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:28,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:58:28,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757115635] [2022-01-31 17:58:28,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:28,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:58:28,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:28,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:58:28,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:58:28,793 INFO L87 Difference]: Start difference. First operand 864 states and 1184 transitions. Second operand has 57 states, 57 states have (on average 2.2280701754385963) internal successors, (127), 56 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:31,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:31,466 INFO L93 Difference]: Finished difference Result 1644 states and 2298 transitions. [2022-01-31 17:58:31,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:58:31,466 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.2280701754385963) internal successors, (127), 56 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 651 [2022-01-31 17:58:31,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:31,468 INFO L225 Difference]: With dead ends: 1644 [2022-01-31 17:58:31,468 INFO L226 Difference]: Without dead ends: 893 [2022-01-31 17:58:31,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:58:31,470 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2981 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2981 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:31,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2981 Valid, 53 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [502 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:58:31,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-01-31 17:58:31,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 880. [2022-01-31 17:58:31,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 875 states have (on average 1.3737142857142857) internal successors, (1202), 875 states have internal predecessors, (1202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:31,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1206 transitions. [2022-01-31 17:58:31,720 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1206 transitions. Word has length 651 [2022-01-31 17:58:31,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:31,720 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1206 transitions. [2022-01-31 17:58:31,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.2280701754385963) internal successors, (127), 56 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:31,720 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1206 transitions. [2022-01-31 17:58:31,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2022-01-31 17:58:31,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:31,724 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:31,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:58:31,724 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:31,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:31,724 INFO L85 PathProgramCache]: Analyzing trace with hash 771097157, now seen corresponding path program 53 times [2022-01-31 17:58:31,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:31,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947460601] [2022-01-31 17:58:31,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:31,727 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:31,727 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:31,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:31,731 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:32,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:32,906 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:32,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947460601] [2022-01-31 17:58:32,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [947460601] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:32,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:32,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:58:32,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241021965] [2022-01-31 17:58:32,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:32,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:58:32,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:32,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:58:32,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:58:32,907 INFO L87 Difference]: Start difference. First operand 880 states and 1206 transitions. Second operand has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:35,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:35,684 INFO L93 Difference]: Finished difference Result 1674 states and 2340 transitions. [2022-01-31 17:58:35,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:58:35,685 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 663 [2022-01-31 17:58:35,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:35,688 INFO L225 Difference]: With dead ends: 1674 [2022-01-31 17:58:35,688 INFO L226 Difference]: Without dead ends: 909 [2022-01-31 17:58:35,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:58:35,690 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2918 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2918 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:35,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2918 Valid, 43 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:58:35,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-01-31 17:58:35,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 896. [2022-01-31 17:58:35,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 891 states have (on average 1.3737373737373737) internal successors, (1224), 891 states have internal predecessors, (1224), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:35,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1228 transitions. [2022-01-31 17:58:35,949 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1228 transitions. Word has length 663 [2022-01-31 17:58:35,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:35,949 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 1228 transitions. [2022-01-31 17:58:35,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:35,949 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1228 transitions. [2022-01-31 17:58:35,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2022-01-31 17:58:35,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:35,953 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:35,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:58:35,953 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:35,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:35,953 INFO L85 PathProgramCache]: Analyzing trace with hash -554061504, now seen corresponding path program 54 times [2022-01-31 17:58:35,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:35,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886109905] [2022-01-31 17:58:35,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:35,955 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:35,955 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:35,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:35,959 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:37,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:37,235 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:37,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886109905] [2022-01-31 17:58:37,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [886109905] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:37,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:37,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:58:37,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990733647] [2022-01-31 17:58:37,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:37,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:58:37,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:37,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:58:37,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:58:37,241 INFO L87 Difference]: Start difference. First operand 896 states and 1228 transitions. Second operand has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 58 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 17:58:40,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:40,139 INFO L93 Difference]: Finished difference Result 1704 states and 2382 transitions. [2022-01-31 17:58:40,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:58:40,139 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 58 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 675 [2022-01-31 17:58:40,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:40,141 INFO L225 Difference]: With dead ends: 1704 [2022-01-31 17:58:40,142 INFO L226 Difference]: Without dead ends: 925 [2022-01-31 17:58:40,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:58:40,145 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3037 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 511 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3037 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 511 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:40,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3037 Valid, 43 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [511 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:58:40,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-01-31 17:58:40,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 912. [2022-01-31 17:58:40,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 907 states have (on average 1.3737596471885336) internal successors, (1246), 907 states have internal predecessors, (1246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:40,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1250 transitions. [2022-01-31 17:58:40,419 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1250 transitions. Word has length 675 [2022-01-31 17:58:40,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:40,419 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1250 transitions. [2022-01-31 17:58:40,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 58 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 17:58:40,420 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1250 transitions. [2022-01-31 17:58:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2022-01-31 17:58:40,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:40,424 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:40,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:58:40,424 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:40,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:40,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1770178913, now seen corresponding path program 55 times [2022-01-31 17:58:40,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:40,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130980128] [2022-01-31 17:58:40,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:40,426 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:40,427 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:40,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:40,432 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:41,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:41,747 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:41,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130980128] [2022-01-31 17:58:41,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2130980128] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:41,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:41,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:58:41,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789686803] [2022-01-31 17:58:41,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:41,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:58:41,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:41,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:58:41,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:58:41,749 INFO L87 Difference]: Start difference. First operand 912 states and 1250 transitions. Second operand has 60 states, 60 states have (on average 2.216666666666667) internal successors, (133), 59 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:44,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:44,747 INFO L93 Difference]: Finished difference Result 1734 states and 2424 transitions. [2022-01-31 17:58:44,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:58:44,748 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.216666666666667) internal successors, (133), 59 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 687 [2022-01-31 17:58:44,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:44,750 INFO L225 Difference]: With dead ends: 1734 [2022-01-31 17:58:44,750 INFO L226 Difference]: Without dead ends: 941 [2022-01-31 17:58:44,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:58:44,752 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3507 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3507 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:44,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3507 Valid, 58 Invalid, 1611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:58:44,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-01-31 17:58:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 928. [2022-01-31 17:58:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 923 states have (on average 1.3737811484290356) internal successors, (1268), 923 states have internal predecessors, (1268), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1272 transitions. [2022-01-31 17:58:45,040 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1272 transitions. Word has length 687 [2022-01-31 17:58:45,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:45,040 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 1272 transitions. [2022-01-31 17:58:45,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.216666666666667) internal successors, (133), 59 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:45,040 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1272 transitions. [2022-01-31 17:58:45,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2022-01-31 17:58:45,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:45,044 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:45,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:58:45,044 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:45,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:45,045 INFO L85 PathProgramCache]: Analyzing trace with hash -488096612, now seen corresponding path program 56 times [2022-01-31 17:58:45,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:45,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132020032] [2022-01-31 17:58:45,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:45,046 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:45,047 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:45,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:45,051 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:46,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:46,398 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:46,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132020032] [2022-01-31 17:58:46,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2132020032] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:46,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:46,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:58:46,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11348306] [2022-01-31 17:58:46,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:46,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:58:46,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:46,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:58:46,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:58:46,400 INFO L87 Difference]: Start difference. First operand 928 states and 1272 transitions. Second operand has 61 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 60 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:49,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:49,591 INFO L93 Difference]: Finished difference Result 1764 states and 2466 transitions. [2022-01-31 17:58:49,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:58:49,591 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 60 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 699 [2022-01-31 17:58:49,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:49,593 INFO L225 Difference]: With dead ends: 1764 [2022-01-31 17:58:49,593 INFO L226 Difference]: Without dead ends: 957 [2022-01-31 17:58:49,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:58:49,594 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3951 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3951 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:49,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3951 Valid, 43 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:58:49,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-01-31 17:58:49,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 944. [2022-01-31 17:58:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 939 states have (on average 1.3738019169329074) internal successors, (1290), 939 states have internal predecessors, (1290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:49,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1294 transitions. [2022-01-31 17:58:49,876 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1294 transitions. Word has length 699 [2022-01-31 17:58:49,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:49,876 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 1294 transitions. [2022-01-31 17:58:49,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 60 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:49,876 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1294 transitions. [2022-01-31 17:58:49,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2022-01-31 17:58:49,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:49,880 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:49,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:58:49,880 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:49,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:49,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1073348221, now seen corresponding path program 57 times [2022-01-31 17:58:49,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:49,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284267470] [2022-01-31 17:58:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:49,882 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:49,882 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:49,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:49,906 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:51,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:51,229 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 17:58:51,229 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:51,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284267470] [2022-01-31 17:58:51,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [284267470] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:51,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:51,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:58:51,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480373018] [2022-01-31 17:58:51,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:51,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:58:51,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:51,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:58:51,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:58:51,231 INFO L87 Difference]: Start difference. First operand 944 states and 1294 transitions. Second operand has 62 states, 62 states have (on average 2.2096774193548385) internal successors, (137), 61 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 17:58:54,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:54,415 INFO L93 Difference]: Finished difference Result 1794 states and 2508 transitions. [2022-01-31 17:58:54,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:58:54,415 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.2096774193548385) internal successors, (137), 61 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 711 [2022-01-31 17:58:54,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:54,431 INFO L225 Difference]: With dead ends: 1794 [2022-01-31 17:58:54,432 INFO L226 Difference]: Without dead ends: 973 [2022-01-31 17:58:54,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:58:54,434 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3186 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3186 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:54,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3186 Valid, 53 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:58:54,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-01-31 17:58:54,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 960. [2022-01-31 17:58:54,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 955 states have (on average 1.3738219895287958) internal successors, (1312), 955 states have internal predecessors, (1312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:54,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1316 transitions. [2022-01-31 17:58:54,727 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1316 transitions. Word has length 711 [2022-01-31 17:58:54,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:54,727 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 1316 transitions. [2022-01-31 17:58:54,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.2096774193548385) internal successors, (137), 61 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 17:58:54,727 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1316 transitions. [2022-01-31 17:58:54,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2022-01-31 17:58:54,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:54,731 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:54,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:58:54,732 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:54,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:54,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1170114040, now seen corresponding path program 58 times [2022-01-31 17:58:54,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:54,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050348094] [2022-01-31 17:58:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:54,734 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:54,734 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:54,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:54,745 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:56,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:56,132 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 17:58:56,132 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:56,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050348094] [2022-01-31 17:58:56,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2050348094] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:56,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:56,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:58:56,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563229287] [2022-01-31 17:58:56,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:56,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:58:56,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:56,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:58:56,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:58:56,134 INFO L87 Difference]: Start difference. First operand 960 states and 1316 transitions. Second operand has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 62 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:59,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:59,456 INFO L93 Difference]: Finished difference Result 1824 states and 2550 transitions. [2022-01-31 17:58:59,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:58:59,456 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 62 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 723 [2022-01-31 17:58:59,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:59,458 INFO L225 Difference]: With dead ends: 1824 [2022-01-31 17:58:59,458 INFO L226 Difference]: Without dead ends: 989 [2022-01-31 17:58:59,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:58:59,459 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3227 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3227 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:59,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3227 Valid, 48 Invalid, 1609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:58:59,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-01-31 17:58:59,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 976. [2022-01-31 17:58:59,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 971 states have (on average 1.3738414006179196) internal successors, (1334), 971 states have internal predecessors, (1334), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:59,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1338 transitions. [2022-01-31 17:58:59,775 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1338 transitions. Word has length 723 [2022-01-31 17:58:59,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:59,775 INFO L470 AbstractCegarLoop]: Abstraction has 976 states and 1338 transitions. [2022-01-31 17:58:59,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 62 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:59,775 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1338 transitions. [2022-01-31 17:58:59,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2022-01-31 17:58:59,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:59,779 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:59,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:58:59,780 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:59,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:59,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1822859673, now seen corresponding path program 59 times [2022-01-31 17:58:59,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:59,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118746649] [2022-01-31 17:58:59,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:59,782 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:59,782 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:59,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:59,786 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:01,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:01,267 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:01,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118746649] [2022-01-31 17:59:01,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1118746649] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:01,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:01,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:59:01,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997827964] [2022-01-31 17:59:01,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:01,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:59:01,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:01,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:59:01,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:59:01,269 INFO L87 Difference]: Start difference. First operand 976 states and 1338 transitions. Second operand has 64 states, 64 states have (on average 2.203125) internal successors, (141), 63 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:04,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:04,628 INFO L93 Difference]: Finished difference Result 1854 states and 2592 transitions. [2022-01-31 17:59:04,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:59:04,628 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.203125) internal successors, (141), 63 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 735 [2022-01-31 17:59:04,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:04,629 INFO L225 Difference]: With dead ends: 1854 [2022-01-31 17:59:04,629 INFO L226 Difference]: Without dead ends: 1005 [2022-01-31 17:59:04,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:59:04,631 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3437 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3437 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:04,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3437 Valid, 53 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:59:04,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-01-31 17:59:04,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 992. [2022-01-31 17:59:04,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 987 states have (on average 1.3738601823708207) internal successors, (1356), 987 states have internal predecessors, (1356), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:04,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1360 transitions. [2022-01-31 17:59:04,956 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1360 transitions. Word has length 735 [2022-01-31 17:59:04,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:04,957 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1360 transitions. [2022-01-31 17:59:04,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.203125) internal successors, (141), 63 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:04,957 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1360 transitions. [2022-01-31 17:59:04,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2022-01-31 17:59:04,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:04,961 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:04,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:59:04,961 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:04,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:04,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1432063316, now seen corresponding path program 60 times [2022-01-31 17:59:04,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:04,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412714981] [2022-01-31 17:59:04,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:04,964 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:04,964 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:04,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:04,969 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:06,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:06,447 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:06,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412714981] [2022-01-31 17:59:06,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [412714981] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:06,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:06,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:59:06,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875449912] [2022-01-31 17:59:06,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:06,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:59:06,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:06,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:59:06,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:59:06,449 INFO L87 Difference]: Start difference. First operand 992 states and 1360 transitions. Second operand has 65 states, 65 states have (on average 2.2) internal successors, (143), 64 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 17:59:09,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:09,990 INFO L93 Difference]: Finished difference Result 1884 states and 2634 transitions. [2022-01-31 17:59:09,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:59:09,991 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.2) internal successors, (143), 64 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 747 [2022-01-31 17:59:09,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:09,992 INFO L225 Difference]: With dead ends: 1884 [2022-01-31 17:59:09,992 INFO L226 Difference]: Without dead ends: 1021 [2022-01-31 17:59:09,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:59:09,994 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4063 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4063 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 672 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:09,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4063 Valid, 48 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [672 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:59:09,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-01-31 17:59:10,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 1008. [2022-01-31 17:59:10,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1003 states have (on average 1.3738783649052841) internal successors, (1378), 1003 states have internal predecessors, (1378), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:10,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1382 transitions. [2022-01-31 17:59:10,400 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1382 transitions. Word has length 747 [2022-01-31 17:59:10,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:10,400 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 1382 transitions. [2022-01-31 17:59:10,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.2) internal successors, (143), 64 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 17:59:10,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1382 transitions. [2022-01-31 17:59:10,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2022-01-31 17:59:10,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:10,405 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:10,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:59:10,406 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:10,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:10,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1546407243, now seen corresponding path program 61 times [2022-01-31 17:59:10,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:10,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364759270] [2022-01-31 17:59:10,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:10,408 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:10,408 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:10,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:10,413 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:11,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:11,910 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 17:59:11,911 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:11,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364759270] [2022-01-31 17:59:11,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1364759270] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:11,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:11,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:59:11,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281729392] [2022-01-31 17:59:11,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:11,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:59:11,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:11,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:59:11,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:59:11,913 INFO L87 Difference]: Start difference. First operand 1008 states and 1382 transitions. Second operand has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 65 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:15,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:15,509 INFO L93 Difference]: Finished difference Result 1914 states and 2676 transitions. [2022-01-31 17:59:15,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:59:15,509 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 65 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 759 [2022-01-31 17:59:15,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:15,511 INFO L225 Difference]: With dead ends: 1914 [2022-01-31 17:59:15,511 INFO L226 Difference]: Without dead ends: 1037 [2022-01-31 17:59:15,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:59:15,512 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3675 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3675 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:15,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3675 Valid, 43 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [612 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:59:15,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-01-31 17:59:15,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1024. [2022-01-31 17:59:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1019 states have (on average 1.3738959764474976) internal successors, (1400), 1019 states have internal predecessors, (1400), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:15,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1404 transitions. [2022-01-31 17:59:15,898 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1404 transitions. Word has length 759 [2022-01-31 17:59:15,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:15,898 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 1404 transitions. [2022-01-31 17:59:15,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 65 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:15,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1404 transitions. [2022-01-31 17:59:15,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2022-01-31 17:59:15,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:15,903 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:15,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:59:15,903 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:15,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:15,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1973310128, now seen corresponding path program 62 times [2022-01-31 17:59:15,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:15,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173200130] [2022-01-31 17:59:15,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:15,905 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:15,905 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:15,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:15,910 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:17,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:17,453 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 17:59:17,453 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:17,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173200130] [2022-01-31 17:59:17,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [173200130] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:17,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:17,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:59:17,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259072386] [2022-01-31 17:59:17,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:17,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:59:17,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:17,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:59:17,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:59:17,455 INFO L87 Difference]: Start difference. First operand 1024 states and 1404 transitions. Second operand has 67 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 66 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:21,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:21,174 INFO L93 Difference]: Finished difference Result 1944 states and 2718 transitions. [2022-01-31 17:59:21,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:59:21,174 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 66 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 771 [2022-01-31 17:59:21,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:21,176 INFO L225 Difference]: With dead ends: 1944 [2022-01-31 17:59:21,176 INFO L226 Difference]: Without dead ends: 1053 [2022-01-31 17:59:21,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:59:21,177 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3404 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3404 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:21,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3404 Valid, 58 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:59:21,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2022-01-31 17:59:21,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1040. [2022-01-31 17:59:21,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1035 states have (on average 1.373913043478261) internal successors, (1422), 1035 states have internal predecessors, (1422), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:21,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1426 transitions. [2022-01-31 17:59:21,533 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1426 transitions. Word has length 771 [2022-01-31 17:59:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:21,533 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 1426 transitions. [2022-01-31 17:59:21,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 66 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1426 transitions. [2022-01-31 17:59:21,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2022-01-31 17:59:21,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:21,538 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:21,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:59:21,538 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:21,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:21,538 INFO L85 PathProgramCache]: Analyzing trace with hash 852242897, now seen corresponding path program 63 times [2022-01-31 17:59:21,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:21,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031071297] [2022-01-31 17:59:21,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:21,540 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:21,540 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:21,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:21,546 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:23,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:23,138 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:23,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031071297] [2022-01-31 17:59:23,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2031071297] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:23,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:23,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:59:23,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822833580] [2022-01-31 17:59:23,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:23,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:59:23,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:23,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:59:23,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:59:23,140 INFO L87 Difference]: Start difference. First operand 1040 states and 1426 transitions. Second operand has 68 states, 68 states have (on average 2.1911764705882355) internal successors, (149), 67 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 17:59:27,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:27,052 INFO L93 Difference]: Finished difference Result 1974 states and 2760 transitions. [2022-01-31 17:59:27,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:59:27,052 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1911764705882355) internal successors, (149), 67 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 783 [2022-01-31 17:59:27,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:27,054 INFO L225 Difference]: With dead ends: 1974 [2022-01-31 17:59:27,054 INFO L226 Difference]: Without dead ends: 1069 [2022-01-31 17:59:27,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:59:27,056 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4511 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4511 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:27,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4511 Valid, 43 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [747 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:59:27,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-01-31 17:59:27,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1056. [2022-01-31 17:59:27,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1051 states have (on average 1.373929590865842) internal successors, (1444), 1051 states have internal predecessors, (1444), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:27,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1448 transitions. [2022-01-31 17:59:27,423 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1448 transitions. Word has length 783 [2022-01-31 17:59:27,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:27,423 INFO L470 AbstractCegarLoop]: Abstraction has 1056 states and 1448 transitions. [2022-01-31 17:59:27,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.1911764705882355) internal successors, (149), 67 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 17:59:27,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1448 transitions. [2022-01-31 17:59:27,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2022-01-31 17:59:27,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:27,428 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:27,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:59:27,429 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:27,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:27,429 INFO L85 PathProgramCache]: Analyzing trace with hash 6673932, now seen corresponding path program 64 times [2022-01-31 17:59:27,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:27,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872243691] [2022-01-31 17:59:27,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:27,431 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:27,431 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:27,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:27,435 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:29,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:29,028 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:29,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872243691] [2022-01-31 17:59:29,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1872243691] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:29,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:29,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:59:29,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371022056] [2022-01-31 17:59:29,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:29,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:59:29,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:29,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:59:29,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:59:29,030 INFO L87 Difference]: Start difference. First operand 1056 states and 1448 transitions. Second operand has 69 states, 69 states have (on average 2.1884057971014492) internal successors, (151), 68 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:33,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:33,120 INFO L93 Difference]: Finished difference Result 2004 states and 2802 transitions. [2022-01-31 17:59:33,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:59:33,120 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1884057971014492) internal successors, (151), 68 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 795 [2022-01-31 17:59:33,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:33,122 INFO L225 Difference]: With dead ends: 2004 [2022-01-31 17:59:33,122 INFO L226 Difference]: Without dead ends: 1085 [2022-01-31 17:59:33,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:59:33,124 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4747 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 781 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4747 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 781 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:33,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4747 Valid, 48 Invalid, 1950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [781 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:59:33,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2022-01-31 17:59:33,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1072. [2022-01-31 17:59:33,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1067 states have (on average 1.3739456419868792) internal successors, (1466), 1067 states have internal predecessors, (1466), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:33,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1470 transitions. [2022-01-31 17:59:33,504 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1470 transitions. Word has length 795 [2022-01-31 17:59:33,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:33,504 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1470 transitions. [2022-01-31 17:59:33,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1884057971014492) internal successors, (151), 68 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:33,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1470 transitions. [2022-01-31 17:59:33,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2022-01-31 17:59:33,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:33,509 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:33,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:59:33,509 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:33,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:33,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1613029651, now seen corresponding path program 65 times [2022-01-31 17:59:33,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:33,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596287559] [2022-01-31 17:59:33,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:33,511 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:33,511 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:33,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:33,516 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:35,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:35,232 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:35,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596287559] [2022-01-31 17:59:35,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1596287559] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:35,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:35,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:59:35,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411740697] [2022-01-31 17:59:35,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:35,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:59:35,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:35,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:59:35,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:59:35,234 INFO L87 Difference]: Start difference. First operand 1072 states and 1470 transitions. Second operand has 70 states, 70 states have (on average 2.1857142857142855) internal successors, (153), 69 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:39,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:39,318 INFO L93 Difference]: Finished difference Result 2034 states and 2844 transitions. [2022-01-31 17:59:39,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:59:39,319 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1857142857142855) internal successors, (153), 69 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 807 [2022-01-31 17:59:39,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:39,320 INFO L225 Difference]: With dead ends: 2034 [2022-01-31 17:59:39,320 INFO L226 Difference]: Without dead ends: 1101 [2022-01-31 17:59:39,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:59:39,322 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4450 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4450 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 735 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:39,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4450 Valid, 58 Invalid, 1935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [735 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:59:39,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2022-01-31 17:59:39,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1088. [2022-01-31 17:59:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1083 states have (on average 1.373961218836565) internal successors, (1488), 1083 states have internal predecessors, (1488), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:39,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1492 transitions. [2022-01-31 17:59:39,737 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1492 transitions. Word has length 807 [2022-01-31 17:59:39,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:39,737 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 1492 transitions. [2022-01-31 17:59:39,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1857142857142855) internal successors, (153), 69 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:39,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1492 transitions. [2022-01-31 17:59:39,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2022-01-31 17:59:39,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:39,743 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:39,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:59:39,743 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:39,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:39,743 INFO L85 PathProgramCache]: Analyzing trace with hash 630265704, now seen corresponding path program 66 times [2022-01-31 17:59:39,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:39,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202487466] [2022-01-31 17:59:39,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:39,745 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:39,745 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:39,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:39,750 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:39,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:41,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:41,552 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:41,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202487466] [2022-01-31 17:59:41,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [202487466] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:41,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:41,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:59:41,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564120564] [2022-01-31 17:59:41,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:41,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:59:41,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:41,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:59:41,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:59:41,554 INFO L87 Difference]: Start difference. First operand 1088 states and 1492 transitions. Second operand has 71 states, 71 states have (on average 2.183098591549296) internal successors, (155), 70 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 17:59:45,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:45,770 INFO L93 Difference]: Finished difference Result 2064 states and 2886 transitions. [2022-01-31 17:59:45,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:59:45,770 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.183098591549296) internal successors, (155), 70 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 819 [2022-01-31 17:59:45,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:45,772 INFO L225 Difference]: With dead ends: 2064 [2022-01-31 17:59:45,772 INFO L226 Difference]: Without dead ends: 1117 [2022-01-31 17:59:45,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:59:45,774 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4192 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4192 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:45,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4192 Valid, 58 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:59:45,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-01-31 17:59:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1104. [2022-01-31 17:59:46,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1099 states have (on average 1.3739763421292084) internal successors, (1510), 1099 states have internal predecessors, (1510), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1514 transitions. [2022-01-31 17:59:46,174 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1514 transitions. Word has length 819 [2022-01-31 17:59:46,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:46,174 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 1514 transitions. [2022-01-31 17:59:46,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.183098591549296) internal successors, (155), 70 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 17:59:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1514 transitions. [2022-01-31 17:59:46,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2022-01-31 17:59:46,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:46,180 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:46,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:59:46,180 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:46,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:46,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1246460425, now seen corresponding path program 67 times [2022-01-31 17:59:46,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:46,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710333334] [2022-01-31 17:59:46,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:46,182 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:46,182 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:46,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:46,188 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:47,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:47,944 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:47,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710333334] [2022-01-31 17:59:47,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1710333334] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:47,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:47,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:59:47,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39921923] [2022-01-31 17:59:47,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:47,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:59:47,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:47,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:59:47,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:59:47,946 INFO L87 Difference]: Start difference. First operand 1104 states and 1514 transitions. Second operand has 72 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 71 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:52,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:52,339 INFO L93 Difference]: Finished difference Result 2094 states and 2928 transitions. [2022-01-31 17:59:52,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:59:52,339 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 71 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 831 [2022-01-31 17:59:52,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:52,341 INFO L225 Difference]: With dead ends: 2094 [2022-01-31 17:59:52,341 INFO L226 Difference]: Without dead ends: 1133 [2022-01-31 17:59:52,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:59:52,343 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4064 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4064 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 678 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:52,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4064 Valid, 63 Invalid, 1919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [678 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:59:52,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-01-31 17:59:52,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 1120. [2022-01-31 17:59:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1115 states have (on average 1.3739910313901345) internal successors, (1532), 1115 states have internal predecessors, (1532), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:52,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1536 transitions. [2022-01-31 17:59:52,752 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1536 transitions. Word has length 831 [2022-01-31 17:59:52,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:52,753 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 1536 transitions. [2022-01-31 17:59:52,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 71 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:52,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1536 transitions. [2022-01-31 17:59:52,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2022-01-31 17:59:52,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:52,758 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 69, 69, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:52,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:59:52,758 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:52,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:52,759 INFO L85 PathProgramCache]: Analyzing trace with hash -889252156, now seen corresponding path program 68 times [2022-01-31 17:59:52,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:52,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620154169] [2022-01-31 17:59:52,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:52,760 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:52,760 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:52,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:52,766 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:54,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:54,570 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:54,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620154169] [2022-01-31 17:59:54,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [620154169] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:54,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:54,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:59:54,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574750661] [2022-01-31 17:59:54,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:54,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:59:54,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:54,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:59:54,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:59:54,572 INFO L87 Difference]: Start difference. First operand 1120 states and 1536 transitions. Second operand has 73 states, 73 states have (on average 2.1780821917808217) internal successors, (159), 72 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:58,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:58,987 INFO L93 Difference]: Finished difference Result 2124 states and 2970 transitions. [2022-01-31 17:59:58,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:59:58,988 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1780821917808217) internal successors, (159), 72 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 843 [2022-01-31 17:59:58,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:58,990 INFO L225 Difference]: With dead ends: 2124 [2022-01-31 17:59:58,990 INFO L226 Difference]: Without dead ends: 1149 [2022-01-31 17:59:58,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:59:58,995 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3754 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3754 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:58,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3754 Valid, 63 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:59:58,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-01-31 17:59:59,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1136. [2022-01-31 17:59:59,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1131 states have (on average 1.3740053050397878) internal successors, (1554), 1131 states have internal predecessors, (1554), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1558 transitions. [2022-01-31 17:59:59,415 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1558 transitions. Word has length 843 [2022-01-31 17:59:59,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:59,415 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 1558 transitions. [2022-01-31 17:59:59,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.1780821917808217) internal successors, (159), 72 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:59:59,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1558 transitions. [2022-01-31 17:59:59,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2022-01-31 17:59:59,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:59,420 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 70, 70, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:59,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:59:59,420 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:59,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:59,421 INFO L85 PathProgramCache]: Analyzing trace with hash 174605093, now seen corresponding path program 69 times [2022-01-31 17:59:59,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:59,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112333347] [2022-01-31 17:59:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:59,422 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:59,423 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:59,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:59,428 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:01,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:01,380 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:01,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112333347] [2022-01-31 18:00:01,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1112333347] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:01,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:01,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 18:00:01,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654472074] [2022-01-31 18:00:01,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:01,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 18:00:01,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:01,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 18:00:01,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 18:00:01,381 INFO L87 Difference]: Start difference. First operand 1136 states and 1558 transitions. Second operand has 74 states, 74 states have (on average 2.175675675675676) internal successors, (161), 73 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 18:00:05,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:05,929 INFO L93 Difference]: Finished difference Result 2154 states and 3012 transitions. [2022-01-31 18:00:05,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 18:00:05,930 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.175675675675676) internal successors, (161), 73 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 855 [2022-01-31 18:00:05,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:05,932 INFO L225 Difference]: With dead ends: 2154 [2022-01-31 18:00:05,932 INFO L226 Difference]: Without dead ends: 1165 [2022-01-31 18:00:05,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 18:00:05,934 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4679 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4679 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:05,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4679 Valid, 48 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [774 Valid, 1254 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:00:05,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-01-31 18:00:06,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1152. [2022-01-31 18:00:06,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1147 states have (on average 1.3740191804707933) internal successors, (1576), 1147 states have internal predecessors, (1576), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:06,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1580 transitions. [2022-01-31 18:00:06,525 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1580 transitions. Word has length 855 [2022-01-31 18:00:06,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:06,526 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 1580 transitions. [2022-01-31 18:00:06,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.175675675675676) internal successors, (161), 73 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 18:00:06,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1580 transitions. [2022-01-31 18:00:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2022-01-31 18:00:06,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:06,531 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:06,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 18:00:06,532 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:06,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:06,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1821299744, now seen corresponding path program 70 times [2022-01-31 18:00:06,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:06,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703808494] [2022-01-31 18:00:06,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:06,533 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:06,534 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:06,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:06,539 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:06,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:08,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:08,437 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:08,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703808494] [2022-01-31 18:00:08,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [703808494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:08,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:08,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 18:00:08,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402083304] [2022-01-31 18:00:08,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:08,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 18:00:08,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:08,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 18:00:08,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 18:00:08,439 INFO L87 Difference]: Start difference. First operand 1152 states and 1580 transitions. Second operand has 75 states, 75 states have (on average 2.1733333333333333) internal successors, (163), 74 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:13,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:13,215 INFO L93 Difference]: Finished difference Result 2184 states and 3054 transitions. [2022-01-31 18:00:13,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 18:00:13,215 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.1733333333333333) internal successors, (163), 74 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 867 [2022-01-31 18:00:13,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:13,217 INFO L225 Difference]: With dead ends: 2184 [2022-01-31 18:00:13,217 INFO L226 Difference]: Without dead ends: 1181 [2022-01-31 18:00:13,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 18:00:13,219 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3914 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 657 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3914 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 657 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:13,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3914 Valid, 63 Invalid, 1949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [657 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:00:13,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-01-31 18:00:13,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1168. [2022-01-31 18:00:13,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1163 states have (on average 1.3740326741186586) internal successors, (1598), 1163 states have internal predecessors, (1598), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:13,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1602 transitions. [2022-01-31 18:00:13,679 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1602 transitions. Word has length 867 [2022-01-31 18:00:13,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:13,679 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 1602 transitions. [2022-01-31 18:00:13,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.1733333333333333) internal successors, (163), 74 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:13,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1602 transitions. [2022-01-31 18:00:13,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2022-01-31 18:00:13,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:13,685 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:13,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 18:00:13,685 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:13,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:13,685 INFO L85 PathProgramCache]: Analyzing trace with hash -780371391, now seen corresponding path program 71 times [2022-01-31 18:00:13,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:13,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034988328] [2022-01-31 18:00:13,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:13,687 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:13,687 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:13,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:13,693 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:15,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:15,732 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:15,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034988328] [2022-01-31 18:00:15,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1034988328] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:15,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:15,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 18:00:15,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671502625] [2022-01-31 18:00:15,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:15,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 18:00:15,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:15,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 18:00:15,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 18:00:15,735 INFO L87 Difference]: Start difference. First operand 1168 states and 1602 transitions. Second operand has 76 states, 76 states have (on average 2.1710526315789473) internal successors, (165), 75 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:20,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:20,816 INFO L93 Difference]: Finished difference Result 2214 states and 3096 transitions. [2022-01-31 18:00:20,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 18:00:20,816 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1710526315789473) internal successors, (165), 75 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 879 [2022-01-31 18:00:20,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:20,818 INFO L225 Difference]: With dead ends: 2214 [2022-01-31 18:00:20,818 INFO L226 Difference]: Without dead ends: 1197 [2022-01-31 18:00:20,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 18:00:20,820 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5866 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 960 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5866 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 960 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:20,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5866 Valid, 38 Invalid, 2234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [960 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:00:20,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2022-01-31 18:00:21,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1184. [2022-01-31 18:00:21,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1179 states have (on average 1.3740458015267176) internal successors, (1620), 1179 states have internal predecessors, (1620), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:21,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1624 transitions. [2022-01-31 18:00:21,297 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1624 transitions. Word has length 879 [2022-01-31 18:00:21,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:21,297 INFO L470 AbstractCegarLoop]: Abstraction has 1184 states and 1624 transitions. [2022-01-31 18:00:21,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1710526315789473) internal successors, (165), 75 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:21,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1624 transitions. [2022-01-31 18:00:21,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2022-01-31 18:00:21,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:21,304 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 73, 73, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:21,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 18:00:21,304 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:21,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:21,304 INFO L85 PathProgramCache]: Analyzing trace with hash -65056900, now seen corresponding path program 72 times [2022-01-31 18:00:21,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:21,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571529904] [2022-01-31 18:00:21,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:21,306 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:21,306 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:21,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:21,314 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:23,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:23,377 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:23,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571529904] [2022-01-31 18:00:23,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [571529904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:23,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:23,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 18:00:23,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188299454] [2022-01-31 18:00:23,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:23,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 18:00:23,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:23,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 18:00:23,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 18:00:23,381 INFO L87 Difference]: Start difference. First operand 1184 states and 1624 transitions. Second operand has 77 states, 77 states have (on average 2.168831168831169) internal successors, (167), 76 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 18:00:28,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:28,434 INFO L93 Difference]: Finished difference Result 2244 states and 3138 transitions. [2022-01-31 18:00:28,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 18:00:28,434 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.168831168831169) internal successors, (167), 76 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 891 [2022-01-31 18:00:28,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:28,436 INFO L225 Difference]: With dead ends: 2244 [2022-01-31 18:00:28,436 INFO L226 Difference]: Without dead ends: 1213 [2022-01-31 18:00:28,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 18:00:28,439 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4360 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 727 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4360 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 727 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:28,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4360 Valid, 58 Invalid, 2046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [727 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:00:28,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-01-31 18:00:29,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1200. [2022-01-31 18:00:29,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1195 states have (on average 1.3740585774058578) internal successors, (1642), 1195 states have internal predecessors, (1642), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:29,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1646 transitions. [2022-01-31 18:00:29,090 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1646 transitions. Word has length 891 [2022-01-31 18:00:29,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:29,090 INFO L470 AbstractCegarLoop]: Abstraction has 1200 states and 1646 transitions. [2022-01-31 18:00:29,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.168831168831169) internal successors, (167), 76 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 18:00:29,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1646 transitions. [2022-01-31 18:00:29,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 904 [2022-01-31 18:00:29,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:29,096 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 74, 74, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:29,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 18:00:29,096 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:29,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:29,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1238572893, now seen corresponding path program 73 times [2022-01-31 18:00:29,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:29,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456617622] [2022-01-31 18:00:29,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:29,099 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:29,099 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:29,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:29,105 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:31,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:31,128 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:31,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456617622] [2022-01-31 18:00:31,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1456617622] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:31,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:31,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 18:00:31,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239262123] [2022-01-31 18:00:31,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:31,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 18:00:31,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:31,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 18:00:31,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 18:00:31,130 INFO L87 Difference]: Start difference. First operand 1200 states and 1646 transitions. Second operand has 78 states, 78 states have (on average 2.1666666666666665) internal successors, (169), 77 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:36,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:36,393 INFO L93 Difference]: Finished difference Result 2274 states and 3180 transitions. [2022-01-31 18:00:36,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 18:00:36,393 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.1666666666666665) internal successors, (169), 77 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 903 [2022-01-31 18:00:36,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:36,395 INFO L225 Difference]: With dead ends: 2274 [2022-01-31 18:00:36,395 INFO L226 Difference]: Without dead ends: 1229 [2022-01-31 18:00:36,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 18:00:36,397 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5337 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5337 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:36,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5337 Valid, 33 Invalid, 2178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:00:36,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2022-01-31 18:00:36,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1216. [2022-01-31 18:00:36,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1211 states have (on average 1.3740710156895128) internal successors, (1664), 1211 states have internal predecessors, (1664), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1668 transitions. [2022-01-31 18:00:36,896 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1668 transitions. Word has length 903 [2022-01-31 18:00:36,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:36,896 INFO L470 AbstractCegarLoop]: Abstraction has 1216 states and 1668 transitions. [2022-01-31 18:00:36,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.1666666666666665) internal successors, (169), 77 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:36,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1668 transitions. [2022-01-31 18:00:36,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2022-01-31 18:00:36,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:36,903 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:36,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 18:00:36,903 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:36,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:36,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1047557928, now seen corresponding path program 74 times [2022-01-31 18:00:36,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:36,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691638965] [2022-01-31 18:00:36,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:36,905 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:36,905 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:36,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:36,911 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:39,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:39,080 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:39,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691638965] [2022-01-31 18:00:39,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [691638965] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:39,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:39,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 18:00:39,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769321225] [2022-01-31 18:00:39,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:39,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 18:00:39,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:39,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 18:00:39,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 18:00:39,083 INFO L87 Difference]: Start difference. First operand 1216 states and 1668 transitions. Second operand has 79 states, 79 states have (on average 2.1645569620253164) internal successors, (171), 78 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:44,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:44,769 INFO L93 Difference]: Finished difference Result 2304 states and 3222 transitions. [2022-01-31 18:00:44,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 18:00:44,770 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.1645569620253164) internal successors, (171), 78 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 915 [2022-01-31 18:00:44,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:44,771 INFO L225 Difference]: With dead ends: 2304 [2022-01-31 18:00:44,771 INFO L226 Difference]: Without dead ends: 1245 [2022-01-31 18:00:44,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 18:00:44,774 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4169 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 697 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4169 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 697 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:44,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4169 Valid, 68 Invalid, 2064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [697 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:00:44,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2022-01-31 18:00:45,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1232. [2022-01-31 18:00:45,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1227 states have (on average 1.374083129584352) internal successors, (1686), 1227 states have internal predecessors, (1686), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:45,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1690 transitions. [2022-01-31 18:00:45,293 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1690 transitions. Word has length 915 [2022-01-31 18:00:45,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:45,293 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 1690 transitions. [2022-01-31 18:00:45,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.1645569620253164) internal successors, (171), 78 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:45,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1690 transitions. [2022-01-31 18:00:45,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2022-01-31 18:00:45,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:45,300 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 76, 76, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:45,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 18:00:45,300 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:45,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:45,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1991717497, now seen corresponding path program 75 times [2022-01-31 18:00:45,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:45,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793522300] [2022-01-31 18:00:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:45,302 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:45,302 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:45,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:45,308 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:47,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:47,555 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:47,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793522300] [2022-01-31 18:00:47,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1793522300] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:47,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:47,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 18:00:47,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017110359] [2022-01-31 18:00:47,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:47,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 18:00:47,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:47,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 18:00:47,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 18:00:47,558 INFO L87 Difference]: Start difference. First operand 1232 states and 1690 transitions. Second operand has 80 states, 80 states have (on average 2.1625) internal successors, (173), 79 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 18:00:53,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:53,522 INFO L93 Difference]: Finished difference Result 2334 states and 3264 transitions. [2022-01-31 18:00:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 18:00:53,522 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.1625) internal successors, (173), 79 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 927 [2022-01-31 18:00:53,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:53,525 INFO L225 Difference]: With dead ends: 2334 [2022-01-31 18:00:53,525 INFO L226 Difference]: Without dead ends: 1261 [2022-01-31 18:00:53,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 18:00:53,528 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5614 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 927 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5614 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 927 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:53,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5614 Valid, 38 Invalid, 2269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [927 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:00:53,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2022-01-31 18:00:54,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1248. [2022-01-31 18:00:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1243 states have (on average 1.3740949316170554) internal successors, (1708), 1243 states have internal predecessors, (1708), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:00:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1712 transitions. [2022-01-31 18:00:54,149 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1712 transitions. Word has length 927 [2022-01-31 18:00:54,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:54,149 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 1712 transitions. [2022-01-31 18:00:54,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.1625) internal successors, (173), 79 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 18:00:54,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1712 transitions. [2022-01-31 18:00:54,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2022-01-31 18:00:54,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:54,156 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:54,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 18:00:54,156 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:54,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:54,156 INFO L85 PathProgramCache]: Analyzing trace with hash 985563188, now seen corresponding path program 76 times [2022-01-31 18:00:54,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:54,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076024088] [2022-01-31 18:00:54,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:54,158 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:54,158 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:54,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:54,164 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:56,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:56,386 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:56,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076024088] [2022-01-31 18:00:56,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1076024088] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:56,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:56,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 18:00:56,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577665754] [2022-01-31 18:00:56,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:56,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 18:00:56,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:56,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 18:00:56,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 18:00:56,389 INFO L87 Difference]: Start difference. First operand 1248 states and 1712 transitions. Second operand has 81 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 80 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:02,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:02,393 INFO L93 Difference]: Finished difference Result 2364 states and 3306 transitions. [2022-01-31 18:01:02,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 18:01:02,394 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 80 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 939 [2022-01-31 18:01:02,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:02,395 INFO L225 Difference]: With dead ends: 2364 [2022-01-31 18:01:02,396 INFO L226 Difference]: Without dead ends: 1277 [2022-01-31 18:01:02,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 18:01:02,398 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4823 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 800 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4823 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 800 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:02,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4823 Valid, 38 Invalid, 2159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [800 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:01:02,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2022-01-31 18:01:03,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1264. [2022-01-31 18:01:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1259 states have (on average 1.374106433677522) internal successors, (1730), 1259 states have internal predecessors, (1730), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1734 transitions. [2022-01-31 18:01:03,065 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1734 transitions. Word has length 939 [2022-01-31 18:01:03,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:03,065 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 1734 transitions. [2022-01-31 18:01:03,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 80 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:03,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1734 transitions. [2022-01-31 18:01:03,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 952 [2022-01-31 18:01:03,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:03,072 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:03,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 18:01:03,072 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:03,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:03,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1416868757, now seen corresponding path program 77 times [2022-01-31 18:01:03,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:03,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727256419] [2022-01-31 18:01:03,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:03,074 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:03,074 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:03,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:03,082 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:05,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:05,344 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:05,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727256419] [2022-01-31 18:01:05,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1727256419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:05,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:05,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 18:01:05,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867523859] [2022-01-31 18:01:05,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:05,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 18:01:05,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:05,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 18:01:05,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 18:01:05,347 INFO L87 Difference]: Start difference. First operand 1264 states and 1734 transitions. Second operand has 82 states, 82 states have (on average 2.158536585365854) internal successors, (177), 81 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:11,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:11,357 INFO L93 Difference]: Finished difference Result 2394 states and 3348 transitions. [2022-01-31 18:01:11,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 18:01:11,357 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.158536585365854) internal successors, (177), 81 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 951 [2022-01-31 18:01:11,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:11,358 INFO L225 Difference]: With dead ends: 2394 [2022-01-31 18:01:11,358 INFO L226 Difference]: Without dead ends: 1293 [2022-01-31 18:01:11,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 18:01:11,364 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5540 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 911 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5540 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 911 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:11,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5540 Valid, 48 Invalid, 2301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [911 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:01:11,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2022-01-31 18:01:11,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1280. [2022-01-31 18:01:11,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1275 states have (on average 1.3741176470588234) internal successors, (1752), 1275 states have internal predecessors, (1752), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1756 transitions. [2022-01-31 18:01:11,925 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1756 transitions. Word has length 951 [2022-01-31 18:01:11,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:11,925 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 1756 transitions. [2022-01-31 18:01:11,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.158536585365854) internal successors, (177), 81 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:11,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1756 transitions. [2022-01-31 18:01:11,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 964 [2022-01-31 18:01:11,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:11,933 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:11,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 18:01:11,933 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:11,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:11,934 INFO L85 PathProgramCache]: Analyzing trace with hash -74762864, now seen corresponding path program 78 times [2022-01-31 18:01:11,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:11,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857526042] [2022-01-31 18:01:11,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:11,936 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:11,936 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:11,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:11,945 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:14,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:14,399 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:14,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857526042] [2022-01-31 18:01:14,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1857526042] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:14,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:14,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 18:01:14,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004797631] [2022-01-31 18:01:14,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:14,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 18:01:14,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:14,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 18:01:14,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 18:01:14,402 INFO L87 Difference]: Start difference. First operand 1280 states and 1756 transitions. Second operand has 83 states, 83 states have (on average 2.1566265060240966) internal successors, (179), 82 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 18:01:20,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:20,546 INFO L93 Difference]: Finished difference Result 2424 states and 3390 transitions. [2022-01-31 18:01:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 18:01:20,547 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.1566265060240966) internal successors, (179), 82 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 963 [2022-01-31 18:01:20,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:20,548 INFO L225 Difference]: With dead ends: 2424 [2022-01-31 18:01:20,548 INFO L226 Difference]: Without dead ends: 1309 [2022-01-31 18:01:20,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 18:01:20,550 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5256 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 867 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5256 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 867 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:20,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5256 Valid, 48 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [867 Valid, 1407 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:01:20,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2022-01-31 18:01:21,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1296. [2022-01-31 18:01:21,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1291 states have (on average 1.3741285824941905) internal successors, (1774), 1291 states have internal predecessors, (1774), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:21,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1778 transitions. [2022-01-31 18:01:21,102 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1778 transitions. Word has length 963 [2022-01-31 18:01:21,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:21,102 INFO L470 AbstractCegarLoop]: Abstraction has 1296 states and 1778 transitions. [2022-01-31 18:01:21,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.1566265060240966) internal successors, (179), 82 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 18:01:21,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1778 transitions. [2022-01-31 18:01:21,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 976 [2022-01-31 18:01:21,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:21,109 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 80, 80, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:21,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 18:01:21,109 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:21,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:21,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2018747057, now seen corresponding path program 79 times [2022-01-31 18:01:21,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:21,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351870879] [2022-01-31 18:01:21,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:21,111 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:21,112 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:21,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:21,119 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:23,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:23,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:23,585 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:23,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351870879] [2022-01-31 18:01:23,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1351870879] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:23,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:23,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 18:01:23,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599143892] [2022-01-31 18:01:23,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:23,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 18:01:23,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:23,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 18:01:23,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 18:01:23,588 INFO L87 Difference]: Start difference. First operand 1296 states and 1778 transitions. Second operand has 84 states, 84 states have (on average 2.1547619047619047) internal successors, (181), 83 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:29,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:29,952 INFO L93 Difference]: Finished difference Result 2454 states and 3432 transitions. [2022-01-31 18:01:29,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 18:01:29,955 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.1547619047619047) internal successors, (181), 83 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 975 [2022-01-31 18:01:29,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:29,957 INFO L225 Difference]: With dead ends: 2454 [2022-01-31 18:01:29,957 INFO L226 Difference]: Without dead ends: 1325 [2022-01-31 18:01:29,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 18:01:29,969 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5375 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 888 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5375 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 888 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:29,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5375 Valid, 53 Invalid, 2319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [888 Valid, 1431 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:01:29,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2022-01-31 18:01:30,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1312. [2022-01-31 18:01:30,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1307 states have (on average 1.3741392501912777) internal successors, (1796), 1307 states have internal predecessors, (1796), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:30,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1800 transitions. [2022-01-31 18:01:30,572 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1800 transitions. Word has length 975 [2022-01-31 18:01:30,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:30,572 INFO L470 AbstractCegarLoop]: Abstraction has 1312 states and 1800 transitions. [2022-01-31 18:01:30,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.1547619047619047) internal successors, (181), 83 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:30,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1800 transitions. [2022-01-31 18:01:30,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 988 [2022-01-31 18:01:30,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:30,580 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 81, 81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:30,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 18:01:30,580 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:30,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:30,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1915442964, now seen corresponding path program 80 times [2022-01-31 18:01:30,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:30,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871575212] [2022-01-31 18:01:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:30,583 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:30,583 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:30,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:30,591 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:33,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:33,038 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:33,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871575212] [2022-01-31 18:01:33,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1871575212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:33,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:33,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 18:01:33,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851084685] [2022-01-31 18:01:33,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:33,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 18:01:33,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:33,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 18:01:33,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 18:01:33,041 INFO L87 Difference]: Start difference. First operand 1312 states and 1800 transitions. Second operand has 85 states, 85 states have (on average 2.152941176470588) internal successors, (183), 84 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:39,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:39,536 INFO L93 Difference]: Finished difference Result 2484 states and 3474 transitions. [2022-01-31 18:01:39,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 18:01:39,536 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.152941176470588) internal successors, (183), 84 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 987 [2022-01-31 18:01:39,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:39,538 INFO L225 Difference]: With dead ends: 2484 [2022-01-31 18:01:39,538 INFO L226 Difference]: Without dead ends: 1341 [2022-01-31 18:01:39,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 18:01:39,541 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5793 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 953 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5793 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 953 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:39,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5793 Valid, 48 Invalid, 2394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [953 Valid, 1441 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:01:39,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2022-01-31 18:01:40,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1328. [2022-01-31 18:01:40,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1323 states have (on average 1.3741496598639455) internal successors, (1818), 1323 states have internal predecessors, (1818), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:40,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 1822 transitions. [2022-01-31 18:01:40,147 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 1822 transitions. Word has length 987 [2022-01-31 18:01:40,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:40,147 INFO L470 AbstractCegarLoop]: Abstraction has 1328 states and 1822 transitions. [2022-01-31 18:01:40,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.152941176470588) internal successors, (183), 84 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:40,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 1822 transitions. [2022-01-31 18:01:40,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1000 [2022-01-31 18:01:40,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:40,155 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 82, 82, 82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:40,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 18:01:40,155 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:40,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:40,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1331560499, now seen corresponding path program 81 times [2022-01-31 18:01:40,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:40,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124963782] [2022-01-31 18:01:40,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:40,158 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:40,158 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:40,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:40,166 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:42,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:42,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:42,680 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:42,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124963782] [2022-01-31 18:01:42,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [124963782] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:42,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:42,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 18:01:42,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958491799] [2022-01-31 18:01:42,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:42,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 18:01:42,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:42,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 18:01:42,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 18:01:42,683 INFO L87 Difference]: Start difference. First operand 1328 states and 1822 transitions. Second operand has 86 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 85 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 18:01:49,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:49,318 INFO L93 Difference]: Finished difference Result 2514 states and 3516 transitions. [2022-01-31 18:01:49,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 18:01:49,318 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 85 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 999 [2022-01-31 18:01:49,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:49,320 INFO L225 Difference]: With dead ends: 2514 [2022-01-31 18:01:49,320 INFO L226 Difference]: Without dead ends: 1357 [2022-01-31 18:01:49,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 18:01:49,322 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4781 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4781 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:49,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4781 Valid, 48 Invalid, 2256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [798 Valid, 1458 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:01:49,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2022-01-31 18:01:49,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1344. [2022-01-31 18:01:49,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1339 states have (on average 1.3741598207617625) internal successors, (1840), 1339 states have internal predecessors, (1840), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:49,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 1844 transitions. [2022-01-31 18:01:49,910 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 1844 transitions. Word has length 999 [2022-01-31 18:01:49,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:49,910 INFO L470 AbstractCegarLoop]: Abstraction has 1344 states and 1844 transitions. [2022-01-31 18:01:49,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 85 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 18:01:49,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 1844 transitions. [2022-01-31 18:01:49,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1012 [2022-01-31 18:01:49,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:49,918 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 83, 83, 83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:49,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 18:01:49,918 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:49,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:49,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1366940232, now seen corresponding path program 82 times [2022-01-31 18:01:49,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:49,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746113012] [2022-01-31 18:01:49,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:49,920 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:49,920 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:49,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:49,928 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:52,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:52,483 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:52,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746113012] [2022-01-31 18:01:52,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [746113012] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:52,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:52,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 18:01:52,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66891884] [2022-01-31 18:01:52,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:52,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 18:01:52,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:52,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 18:01:52,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 18:01:52,486 INFO L87 Difference]: Start difference. First operand 1344 states and 1844 transitions. Second operand has 87 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 86 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:01:59,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:59,354 INFO L93 Difference]: Finished difference Result 2544 states and 3558 transitions. [2022-01-31 18:01:59,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 18:01:59,354 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 86 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1011 [2022-01-31 18:01:59,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:59,356 INFO L225 Difference]: With dead ends: 2544 [2022-01-31 18:01:59,356 INFO L226 Difference]: Without dead ends: 1373 [2022-01-31 18:01:59,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 18:01:59,359 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5589 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 921 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5589 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 921 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:59,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5589 Valid, 38 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [921 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:01:59,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2022-01-31 18:02:00,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1360. [2022-01-31 18:02:00,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1355 states have (on average 1.374169741697417) internal successors, (1862), 1355 states have internal predecessors, (1862), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:00,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 1866 transitions. [2022-01-31 18:02:00,080 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 1866 transitions. Word has length 1011 [2022-01-31 18:02:00,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:00,081 INFO L470 AbstractCegarLoop]: Abstraction has 1360 states and 1866 transitions. [2022-01-31 18:02:00,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 86 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:00,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 1866 transitions. [2022-01-31 18:02:00,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1024 [2022-01-31 18:02:00,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:00,091 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 84, 84, 84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:00,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 18:02:00,091 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:00,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:00,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1532376343, now seen corresponding path program 83 times [2022-01-31 18:02:00,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:00,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95424311] [2022-01-31 18:02:00,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:00,094 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:00,094 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:00,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:00,101 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:02,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:02,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:02,722 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 18:02:02,723 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:02,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95424311] [2022-01-31 18:02:02,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [95424311] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:02,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:02,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 18:02:02,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556647250] [2022-01-31 18:02:02,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:02,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 18:02:02,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:02,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 18:02:02,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 18:02:02,726 INFO L87 Difference]: Start difference. First operand 1360 states and 1866 transitions. Second operand has 88 states, 88 states have (on average 2.147727272727273) internal successors, (189), 87 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:09,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:09,834 INFO L93 Difference]: Finished difference Result 2574 states and 3600 transitions. [2022-01-31 18:02:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 18:02:09,835 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.147727272727273) internal successors, (189), 87 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1023 [2022-01-31 18:02:09,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:09,836 INFO L225 Difference]: With dead ends: 2574 [2022-01-31 18:02:09,836 INFO L226 Difference]: Without dead ends: 1389 [2022-01-31 18:02:09,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 18:02:09,839 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5656 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 937 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5656 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 937 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:09,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5656 Valid, 53 Invalid, 2436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [937 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:02:09,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2022-01-31 18:02:10,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1376. [2022-01-31 18:02:10,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1371 states have (on average 1.37417943107221) internal successors, (1884), 1371 states have internal predecessors, (1884), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:10,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 1888 transitions. [2022-01-31 18:02:10,488 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 1888 transitions. Word has length 1023 [2022-01-31 18:02:10,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:10,489 INFO L470 AbstractCegarLoop]: Abstraction has 1376 states and 1888 transitions. [2022-01-31 18:02:10,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.147727272727273) internal successors, (189), 87 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:10,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 1888 transitions. [2022-01-31 18:02:10,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1036 [2022-01-31 18:02:10,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:10,497 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:10,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 18:02:10,498 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:10,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:10,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1549388196, now seen corresponding path program 84 times [2022-01-31 18:02:10,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:10,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977784261] [2022-01-31 18:02:10,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:10,501 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:10,501 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:10,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:10,511 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:13,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:13,179 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:13,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977784261] [2022-01-31 18:02:13,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1977784261] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:13,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:13,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 18:02:13,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959576731] [2022-01-31 18:02:13,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:13,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 18:02:13,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:13,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 18:02:13,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:02:13,182 INFO L87 Difference]: Start difference. First operand 1376 states and 1888 transitions. Second operand has 89 states, 89 states have (on average 2.146067415730337) internal successors, (191), 88 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:20,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:20,106 INFO L93 Difference]: Finished difference Result 2604 states and 3642 transitions. [2022-01-31 18:02:20,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 18:02:20,107 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.146067415730337) internal successors, (191), 88 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 1035 [2022-01-31 18:02:20,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:20,108 INFO L225 Difference]: With dead ends: 2604 [2022-01-31 18:02:20,108 INFO L226 Difference]: Without dead ends: 1405 [2022-01-31 18:02:20,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 18:02:20,110 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5554 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 919 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5554 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 919 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:20,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5554 Valid, 48 Invalid, 2428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [919 Valid, 1509 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:02:20,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2022-01-31 18:02:20,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1392. [2022-01-31 18:02:20,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1387 states have (on average 1.3741888968997837) internal successors, (1906), 1387 states have internal predecessors, (1906), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:20,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 1910 transitions. [2022-01-31 18:02:20,763 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 1910 transitions. Word has length 1035 [2022-01-31 18:02:20,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:20,763 INFO L470 AbstractCegarLoop]: Abstraction has 1392 states and 1910 transitions. [2022-01-31 18:02:20,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.146067415730337) internal successors, (191), 88 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:20,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 1910 transitions. [2022-01-31 18:02:20,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1048 [2022-01-31 18:02:20,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:20,771 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 86, 86, 86, 86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:20,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 18:02:20,771 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:20,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:20,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1958085637, now seen corresponding path program 85 times [2022-01-31 18:02:20,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:20,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220789325] [2022-01-31 18:02:20,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:20,774 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:20,774 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:20,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:20,781 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:23,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:23,466 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:23,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220789325] [2022-01-31 18:02:23,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [220789325] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:23,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:23,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 18:02:23,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246895884] [2022-01-31 18:02:23,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:23,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 18:02:23,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:23,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 18:02:23,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 18:02:23,469 INFO L87 Difference]: Start difference. First operand 1392 states and 1910 transitions. Second operand has 90 states, 90 states have (on average 2.1444444444444444) internal successors, (193), 89 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:30,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:30,924 INFO L93 Difference]: Finished difference Result 2634 states and 3684 transitions. [2022-01-31 18:02:30,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 18:02:30,924 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.1444444444444444) internal successors, (193), 89 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1047 [2022-01-31 18:02:30,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:30,926 INFO L225 Difference]: With dead ends: 2634 [2022-01-31 18:02:30,926 INFO L226 Difference]: Without dead ends: 1421 [2022-01-31 18:02:30,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 18:02:30,928 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6518 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 1069 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6518 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1069 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:30,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6518 Valid, 38 Invalid, 2581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1069 Valid, 1512 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:02:30,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2022-01-31 18:02:31,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1408. [2022-01-31 18:02:31,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1403 states have (on average 1.3741981468282252) internal successors, (1928), 1403 states have internal predecessors, (1928), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:31,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 1932 transitions. [2022-01-31 18:02:31,689 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 1932 transitions. Word has length 1047 [2022-01-31 18:02:31,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:31,689 INFO L470 AbstractCegarLoop]: Abstraction has 1408 states and 1932 transitions. [2022-01-31 18:02:31,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.1444444444444444) internal successors, (193), 89 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:31,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 1932 transitions. [2022-01-31 18:02:31,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2022-01-31 18:02:31,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:31,698 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:31,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 18:02:31,698 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:31,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:31,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1515419392, now seen corresponding path program 86 times [2022-01-31 18:02:31,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:31,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262623050] [2022-01-31 18:02:31,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:31,701 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:31,701 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:31,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:31,709 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:34,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:34,462 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:34,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262623050] [2022-01-31 18:02:34,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [262623050] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:34,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:34,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 18:02:34,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893270591] [2022-01-31 18:02:34,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:34,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 18:02:34,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:34,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 18:02:34,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 18:02:34,465 INFO L87 Difference]: Start difference. First operand 1408 states and 1932 transitions. Second operand has 91 states, 91 states have (on average 2.142857142857143) internal successors, (195), 90 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:42,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:42,021 INFO L93 Difference]: Finished difference Result 2664 states and 3726 transitions. [2022-01-31 18:02:42,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 18:02:42,022 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.142857142857143) internal successors, (195), 90 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1059 [2022-01-31 18:02:42,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:42,024 INFO L225 Difference]: With dead ends: 2664 [2022-01-31 18:02:42,024 INFO L226 Difference]: Without dead ends: 1437 [2022-01-31 18:02:42,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 18:02:42,027 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6702 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 1101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6702 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1101 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:42,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6702 Valid, 43 Invalid, 2637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1101 Valid, 1536 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:02:42,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2022-01-31 18:02:42,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1424. [2022-01-31 18:02:42,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1419 states have (on average 1.3742071881606766) internal successors, (1950), 1419 states have internal predecessors, (1950), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 1954 transitions. [2022-01-31 18:02:42,687 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 1954 transitions. Word has length 1059 [2022-01-31 18:02:42,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:42,687 INFO L470 AbstractCegarLoop]: Abstraction has 1424 states and 1954 transitions. [2022-01-31 18:02:42,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.142857142857143) internal successors, (195), 90 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:42,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 1954 transitions. [2022-01-31 18:02:42,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1072 [2022-01-31 18:02:42,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:42,695 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 88, 88, 88, 88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:42,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 18:02:42,695 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:42,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:42,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1511107361, now seen corresponding path program 87 times [2022-01-31 18:02:42,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:42,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777228967] [2022-01-31 18:02:42,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:42,697 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:42,697 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:42,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:42,705 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:45,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:45,570 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:45,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777228967] [2022-01-31 18:02:45,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [777228967] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:45,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:45,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 18:02:45,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013261891] [2022-01-31 18:02:45,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:45,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 18:02:45,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:45,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 18:02:45,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 18:02:45,573 INFO L87 Difference]: Start difference. First operand 1424 states and 1954 transitions. Second operand has 92 states, 92 states have (on average 2.141304347826087) internal successors, (197), 91 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:53,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:53,220 INFO L93 Difference]: Finished difference Result 2694 states and 3768 transitions. [2022-01-31 18:02:53,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 18:02:53,220 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.141304347826087) internal successors, (197), 91 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 1071 [2022-01-31 18:02:53,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:53,222 INFO L225 Difference]: With dead ends: 2694 [2022-01-31 18:02:53,222 INFO L226 Difference]: Without dead ends: 1453 [2022-01-31 18:02:53,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 18:02:53,224 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6665 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 1091 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6665 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1091 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:53,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6665 Valid, 33 Invalid, 2630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1091 Valid, 1539 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 18:02:53,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2022-01-31 18:02:53,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1440. [2022-01-31 18:02:53,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1435 states have (on average 1.3742160278745645) internal successors, (1972), 1435 states have internal predecessors, (1972), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:53,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 1976 transitions. [2022-01-31 18:02:53,919 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 1976 transitions. Word has length 1071 [2022-01-31 18:02:53,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:53,920 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 1976 transitions. [2022-01-31 18:02:53,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.141304347826087) internal successors, (197), 91 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:02:53,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 1976 transitions. [2022-01-31 18:02:53,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1084 [2022-01-31 18:02:53,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:53,928 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 89, 89, 89, 89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:53,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 18:02:53,928 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:53,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1833296476, now seen corresponding path program 88 times [2022-01-31 18:02:53,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:53,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404624514] [2022-01-31 18:02:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:53,931 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:53,931 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:53,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:53,940 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:56,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:56,840 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:56,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404624514] [2022-01-31 18:02:56,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1404624514] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:56,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:56,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 18:02:56,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518678274] [2022-01-31 18:02:56,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:56,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 18:02:56,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:56,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 18:02:56,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 18:02:56,843 INFO L87 Difference]: Start difference. First operand 1440 states and 1976 transitions. Second operand has 93 states, 93 states have (on average 2.139784946236559) internal successors, (199), 92 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:04,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:04,764 INFO L93 Difference]: Finished difference Result 2724 states and 3810 transitions. [2022-01-31 18:03:04,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 18:03:04,765 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.139784946236559) internal successors, (199), 92 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1083 [2022-01-31 18:03:04,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:04,766 INFO L225 Difference]: With dead ends: 2724 [2022-01-31 18:03:04,766 INFO L226 Difference]: Without dead ends: 1469 [2022-01-31 18:03:04,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 18:03:04,769 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6303 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1563 mSolverCounterSat, 1037 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6303 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1037 IncrementalHoareTripleChecker+Valid, 1563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:04,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6303 Valid, 38 Invalid, 2600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1037 Valid, 1563 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 18:03:04,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2022-01-31 18:03:05,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1456. [2022-01-31 18:03:05,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1451 states have (on average 1.3742246726395588) internal successors, (1994), 1451 states have internal predecessors, (1994), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:05,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 1998 transitions. [2022-01-31 18:03:05,451 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 1998 transitions. Word has length 1083 [2022-01-31 18:03:05,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:05,451 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 1998 transitions. [2022-01-31 18:03:05,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.139784946236559) internal successors, (199), 92 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:05,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 1998 transitions. [2022-01-31 18:03:05,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1096 [2022-01-31 18:03:05,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:05,460 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 90, 90, 90, 90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:05,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 18:03:05,460 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:05,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:05,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1191690301, now seen corresponding path program 89 times [2022-01-31 18:03:05,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:05,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911463804] [2022-01-31 18:03:05,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:05,462 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:05,462 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:05,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:05,471 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:08,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:08,441 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:08,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911463804] [2022-01-31 18:03:08,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1911463804] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:08,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:08,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 18:03:08,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042911282] [2022-01-31 18:03:08,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:08,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 18:03:08,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:08,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 18:03:08,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 18:03:08,444 INFO L87 Difference]: Start difference. First operand 1456 states and 1998 transitions. Second operand has 94 states, 94 states have (on average 2.1382978723404253) internal successors, (201), 93 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:17,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:17,108 INFO L93 Difference]: Finished difference Result 2754 states and 3852 transitions. [2022-01-31 18:03:17,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 18:03:17,109 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.1382978723404253) internal successors, (201), 93 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1095 [2022-01-31 18:03:17,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:17,110 INFO L225 Difference]: With dead ends: 2754 [2022-01-31 18:03:17,110 INFO L226 Difference]: Without dead ends: 1485 [2022-01-31 18:03:17,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 18:03:17,113 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6084 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 1003 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6084 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1003 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:17,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6084 Valid, 48 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1003 Valid, 1594 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 18:03:17,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2022-01-31 18:03:18,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 1472. [2022-01-31 18:03:18,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1467 states have (on average 1.3742331288343559) internal successors, (2016), 1467 states have internal predecessors, (2016), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:18,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2020 transitions. [2022-01-31 18:03:18,099 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2020 transitions. Word has length 1095 [2022-01-31 18:03:18,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:18,099 INFO L470 AbstractCegarLoop]: Abstraction has 1472 states and 2020 transitions. [2022-01-31 18:03:18,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.1382978723404253) internal successors, (201), 93 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:18,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2020 transitions. [2022-01-31 18:03:18,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1108 [2022-01-31 18:03:18,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:18,110 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:18,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 18:03:18,110 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:18,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:18,110 INFO L85 PathProgramCache]: Analyzing trace with hash 219155384, now seen corresponding path program 90 times [2022-01-31 18:03:18,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:18,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640178248] [2022-01-31 18:03:18,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:18,114 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:18,114 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:18,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:18,125 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:21,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:21,350 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:21,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640178248] [2022-01-31 18:03:21,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [640178248] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:21,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:21,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 18:03:21,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759067617] [2022-01-31 18:03:21,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:21,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 18:03:21,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:21,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 18:03:21,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 18:03:21,354 INFO L87 Difference]: Start difference. First operand 1472 states and 2020 transitions. Second operand has 95 states, 95 states have (on average 2.136842105263158) internal successors, (203), 94 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:31,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:31,645 INFO L93 Difference]: Finished difference Result 2784 states and 3894 transitions. [2022-01-31 18:03:31,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 18:03:31,645 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.136842105263158) internal successors, (203), 94 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 1107 [2022-01-31 18:03:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:31,647 INFO L225 Difference]: With dead ends: 2784 [2022-01-31 18:03:31,647 INFO L226 Difference]: Without dead ends: 1501 [2022-01-31 18:03:31,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 18:03:31,649 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5839 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 966 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5839 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 966 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:31,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5839 Valid, 43 Invalid, 2570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [966 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 18:03:31,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-01-31 18:03:32,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1488. [2022-01-31 18:03:32,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1483 states have (on average 1.3742414025623735) internal successors, (2038), 1483 states have internal predecessors, (2038), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:32,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 2042 transitions. [2022-01-31 18:03:32,393 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 2042 transitions. Word has length 1107 [2022-01-31 18:03:32,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:32,393 INFO L470 AbstractCegarLoop]: Abstraction has 1488 states and 2042 transitions. [2022-01-31 18:03:32,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.136842105263158) internal successors, (203), 94 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:32,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 2042 transitions. [2022-01-31 18:03:32,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1120 [2022-01-31 18:03:32,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:32,401 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:32,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 18:03:32,402 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:32,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:32,402 INFO L85 PathProgramCache]: Analyzing trace with hash -2031926439, now seen corresponding path program 91 times [2022-01-31 18:03:32,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:32,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910182680] [2022-01-31 18:03:32,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:32,404 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:32,404 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:32,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:32,413 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:35,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:35,528 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:35,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910182680] [2022-01-31 18:03:35,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1910182680] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:35,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:35,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 18:03:35,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629922422] [2022-01-31 18:03:35,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:35,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 18:03:35,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:35,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 18:03:35,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 18:03:35,531 INFO L87 Difference]: Start difference. First operand 1488 states and 2042 transitions. Second operand has 96 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 95 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:44,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:44,144 INFO L93 Difference]: Finished difference Result 2814 states and 3936 transitions. [2022-01-31 18:03:44,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 18:03:44,145 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 95 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1119 [2022-01-31 18:03:44,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:44,146 INFO L225 Difference]: With dead ends: 2814 [2022-01-31 18:03:44,146 INFO L226 Difference]: Without dead ends: 1517 [2022-01-31 18:03:44,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 18:03:44,149 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6348 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 1049 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6348 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1049 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:44,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6348 Valid, 38 Invalid, 2663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1049 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 18:03:44,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2022-01-31 18:03:44,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1504. [2022-01-31 18:03:44,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1499 states have (on average 1.3742494996664443) internal successors, (2060), 1499 states have internal predecessors, (2060), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:44,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 2064 transitions. [2022-01-31 18:03:44,879 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 2064 transitions. Word has length 1119 [2022-01-31 18:03:44,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:44,880 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 2064 transitions. [2022-01-31 18:03:44,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 95 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 2064 transitions. [2022-01-31 18:03:44,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1132 [2022-01-31 18:03:44,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:44,888 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:44,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 18:03:44,889 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:44,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:44,889 INFO L85 PathProgramCache]: Analyzing trace with hash -409930988, now seen corresponding path program 92 times [2022-01-31 18:03:44,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:44,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336222231] [2022-01-31 18:03:44,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:44,891 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:44,891 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:44,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:44,900 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:49,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:49,183 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:49,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336222231] [2022-01-31 18:03:49,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [336222231] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:49,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:49,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 18:03:49,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884299429] [2022-01-31 18:03:49,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:49,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 18:03:49,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:49,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 18:03:49,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 18:03:49,186 INFO L87 Difference]: Start difference. First operand 1504 states and 2064 transitions. Second operand has 97 states, 97 states have (on average 2.134020618556701) internal successors, (207), 96 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:03:59,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:59,111 INFO L93 Difference]: Finished difference Result 2844 states and 3978 transitions. [2022-01-31 18:03:59,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 18:03:59,112 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.134020618556701) internal successors, (207), 96 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1131 [2022-01-31 18:03:59,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:59,113 INFO L225 Difference]: With dead ends: 2844 [2022-01-31 18:03:59,113 INFO L226 Difference]: Without dead ends: 1533 [2022-01-31 18:03:59,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 18:03:59,116 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5661 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 940 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5661 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 940 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:59,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5661 Valid, 58 Invalid, 2599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [940 Valid, 1659 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 18:03:59,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2022-01-31 18:03:59,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1520. [2022-01-31 18:03:59,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1515 states have (on average 1.3742574257425744) internal successors, (2082), 1515 states have internal predecessors, (2082), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:00,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 2086 transitions. [2022-01-31 18:04:00,000 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 2086 transitions. Word has length 1131 [2022-01-31 18:04:00,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:00,000 INFO L470 AbstractCegarLoop]: Abstraction has 1520 states and 2086 transitions. [2022-01-31 18:04:00,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.134020618556701) internal successors, (207), 96 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:00,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 2086 transitions. [2022-01-31 18:04:00,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1144 [2022-01-31 18:04:00,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:00,041 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:00,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 18:04:00,042 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:00,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:00,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1575957621, now seen corresponding path program 93 times [2022-01-31 18:04:00,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:00,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603365977] [2022-01-31 18:04:00,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:00,045 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:00,045 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:00,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:00,056 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:03,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:04:03,283 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:03,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603365977] [2022-01-31 18:04:03,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1603365977] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:03,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:03,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 18:04:03,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139495338] [2022-01-31 18:04:03,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:03,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 18:04:03,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:03,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 18:04:03,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 18:04:03,287 INFO L87 Difference]: Start difference. First operand 1520 states and 2086 transitions. Second operand has 98 states, 98 states have (on average 2.13265306122449) internal successors, (209), 97 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:12,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:12,670 INFO L93 Difference]: Finished difference Result 2874 states and 4020 transitions. [2022-01-31 18:04:12,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 18:04:12,670 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.13265306122449) internal successors, (209), 97 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 1143 [2022-01-31 18:04:12,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:12,672 INFO L225 Difference]: With dead ends: 2874 [2022-01-31 18:04:12,672 INFO L226 Difference]: Without dead ends: 1549 [2022-01-31 18:04:12,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 18:04:12,674 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6989 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1676 mSolverCounterSat, 1149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6989 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1149 IncrementalHoareTripleChecker+Valid, 1676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:12,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6989 Valid, 58 Invalid, 2825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1149 Valid, 1676 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 18:04:12,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2022-01-31 18:04:13,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 1536. [2022-01-31 18:04:13,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1531 states have (on average 1.3742651861528412) internal successors, (2104), 1531 states have internal predecessors, (2104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:13,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 2108 transitions. [2022-01-31 18:04:13,483 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 2108 transitions. Word has length 1143 [2022-01-31 18:04:13,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:13,483 INFO L470 AbstractCegarLoop]: Abstraction has 1536 states and 2108 transitions. [2022-01-31 18:04:13,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.13265306122449) internal successors, (209), 97 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:13,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 2108 transitions. [2022-01-31 18:04:13,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1156 [2022-01-31 18:04:13,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:13,494 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 95, 95, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:13,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 18:04:13,495 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:13,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:13,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1062758288, now seen corresponding path program 94 times [2022-01-31 18:04:13,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:13,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218376612] [2022-01-31 18:04:13,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:13,498 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:13,499 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:13,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:13,512 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:17,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:04:17,392 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:17,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218376612] [2022-01-31 18:04:17,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [218376612] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:17,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:17,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 18:04:17,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407731270] [2022-01-31 18:04:17,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:17,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 18:04:17,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:17,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 18:04:17,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 18:04:17,396 INFO L87 Difference]: Start difference. First operand 1536 states and 2108 transitions. Second operand has 99 states, 99 states have (on average 2.1313131313131315) internal successors, (211), 98 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:28,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:28,111 INFO L93 Difference]: Finished difference Result 2904 states and 4062 transitions. [2022-01-31 18:04:28,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 18:04:28,112 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.1313131313131315) internal successors, (211), 98 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1155 [2022-01-31 18:04:28,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:28,114 INFO L225 Difference]: With dead ends: 2904 [2022-01-31 18:04:28,114 INFO L226 Difference]: Without dead ends: 1565 [2022-01-31 18:04:28,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 18:04:28,116 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6146 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1707 mSolverCounterSat, 1016 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6146 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1016 IncrementalHoareTripleChecker+Valid, 1707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:28,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6146 Valid, 68 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1016 Valid, 1707 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 18:04:28,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2022-01-31 18:04:29,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1552. [2022-01-31 18:04:29,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1547 states have (on average 1.374272786037492) internal successors, (2126), 1547 states have internal predecessors, (2126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:29,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 2130 transitions. [2022-01-31 18:04:29,036 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 2130 transitions. Word has length 1155 [2022-01-31 18:04:29,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:29,037 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 2130 transitions. [2022-01-31 18:04:29,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.1313131313131315) internal successors, (211), 98 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:29,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 2130 transitions. [2022-01-31 18:04:29,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1168 [2022-01-31 18:04:29,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:29,048 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:29,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 18:04:29,048 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:29,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:29,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1451846767, now seen corresponding path program 95 times [2022-01-31 18:04:29,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:29,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441679029] [2022-01-31 18:04:29,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:29,050 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:29,050 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:29,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:29,060 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:32,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:04:32,757 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:32,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441679029] [2022-01-31 18:04:32,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1441679029] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:32,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:32,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 18:04:32,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27793469] [2022-01-31 18:04:32,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:32,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 18:04:32,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:32,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 18:04:32,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 18:04:32,760 INFO L87 Difference]: Start difference. First operand 1552 states and 2130 transitions. Second operand has 100 states, 100 states have (on average 2.13) internal successors, (213), 99 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:43,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:43,929 INFO L93 Difference]: Finished difference Result 2934 states and 4104 transitions. [2022-01-31 18:04:43,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 18:04:43,929 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.13) internal successors, (213), 99 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1167 [2022-01-31 18:04:43,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:43,931 INFO L225 Difference]: With dead ends: 2934 [2022-01-31 18:04:43,932 INFO L226 Difference]: Without dead ends: 1581 [2022-01-31 18:04:43,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 18:04:43,935 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5914 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5914 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 981 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:43,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5914 Valid, 68 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [981 Valid, 1724 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 18:04:43,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2022-01-31 18:04:45,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1568. [2022-01-31 18:04:45,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1563 states have (on average 1.3742802303262955) internal successors, (2148), 1563 states have internal predecessors, (2148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 2152 transitions. [2022-01-31 18:04:45,047 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 2152 transitions. Word has length 1167 [2022-01-31 18:04:45,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:45,048 INFO L470 AbstractCegarLoop]: Abstraction has 1568 states and 2152 transitions. [2022-01-31 18:04:45,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.13) internal successors, (213), 99 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:04:45,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 2152 transitions. [2022-01-31 18:04:45,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1180 [2022-01-31 18:04:45,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:45,060 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 97, 97, 97, 97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:45,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 18:04:45,061 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:45,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:45,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1379072972, now seen corresponding path program 96 times [2022-01-31 18:04:45,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:45,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257623853] [2022-01-31 18:04:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:45,064 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:45,064 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:45,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:45,086 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:48,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:04:48,759 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:48,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257623853] [2022-01-31 18:04:48,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [257623853] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:48,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:48,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 18:04:48,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2995416] [2022-01-31 18:04:48,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:48,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 18:04:48,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:48,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 18:04:48,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 18:04:48,763 INFO L87 Difference]: Start difference. First operand 1568 states and 2152 transitions. Second operand has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 100 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:00,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:00,588 INFO L93 Difference]: Finished difference Result 2964 states and 4146 transitions. [2022-01-31 18:05:00,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 18:05:00,588 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 100 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 1179 [2022-01-31 18:05:00,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:00,590 INFO L225 Difference]: With dead ends: 2964 [2022-01-31 18:05:00,590 INFO L226 Difference]: Without dead ends: 1597 [2022-01-31 18:05:00,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 18:05:00,593 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7268 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1706 mSolverCounterSat, 1192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7268 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1192 IncrementalHoareTripleChecker+Valid, 1706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:00,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7268 Valid, 43 Invalid, 2898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1192 Valid, 1706 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 18:05:00,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2022-01-31 18:05:01,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1584. [2022-01-31 18:05:01,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1579 states have (on average 1.3742875237492083) internal successors, (2170), 1579 states have internal predecessors, (2170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:01,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2174 transitions. [2022-01-31 18:05:01,447 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2174 transitions. Word has length 1179 [2022-01-31 18:05:01,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:01,448 INFO L470 AbstractCegarLoop]: Abstraction has 1584 states and 2174 transitions. [2022-01-31 18:05:01,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 100 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:01,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2174 transitions. [2022-01-31 18:05:01,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1192 [2022-01-31 18:05:01,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:01,457 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 98, 98, 98, 98, 98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:01,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 18:05:01,458 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:01,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:01,458 INFO L85 PathProgramCache]: Analyzing trace with hash 2143576237, now seen corresponding path program 97 times [2022-01-31 18:05:01,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:01,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155141469] [2022-01-31 18:05:01,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:01,460 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:01,460 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:01,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:01,472 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:04,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:05:04,949 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:04,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155141469] [2022-01-31 18:05:04,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [155141469] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:04,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:04,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 18:05:04,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270442691] [2022-01-31 18:05:04,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:04,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 18:05:04,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:04,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 18:05:04,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 18:05:04,952 INFO L87 Difference]: Start difference. First operand 1584 states and 2174 transitions. Second operand has 102 states, 102 states have (on average 2.127450980392157) internal successors, (217), 101 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:15,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:15,409 INFO L93 Difference]: Finished difference Result 2994 states and 4188 transitions. [2022-01-31 18:05:15,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 18:05:15,409 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.127450980392157) internal successors, (217), 101 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1191 [2022-01-31 18:05:15,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:15,411 INFO L225 Difference]: With dead ends: 2994 [2022-01-31 18:05:15,411 INFO L226 Difference]: Without dead ends: 1613 [2022-01-31 18:05:15,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 18:05:15,413 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7634 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 1254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7634 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1254 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:15,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7634 Valid, 48 Invalid, 2984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1254 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 18:05:15,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2022-01-31 18:05:16,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1600. [2022-01-31 18:05:16,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1595 states have (on average 1.374294670846395) internal successors, (2192), 1595 states have internal predecessors, (2192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:16,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2196 transitions. [2022-01-31 18:05:16,251 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2196 transitions. Word has length 1191 [2022-01-31 18:05:16,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:16,252 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 2196 transitions. [2022-01-31 18:05:16,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.127450980392157) internal successors, (217), 101 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:16,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2196 transitions. [2022-01-31 18:05:16,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1204 [2022-01-31 18:05:16,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:16,261 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:16,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 18:05:16,261 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:16,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:16,262 INFO L85 PathProgramCache]: Analyzing trace with hash 739384616, now seen corresponding path program 98 times [2022-01-31 18:05:16,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:16,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512394492] [2022-01-31 18:05:16,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:16,263 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:16,263 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:16,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:16,274 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:19,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:19,947 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 18:05:19,947 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:19,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512394492] [2022-01-31 18:05:19,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1512394492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:19,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:19,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 18:05:19,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513023991] [2022-01-31 18:05:19,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:19,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 18:05:19,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:19,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 18:05:19,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 18:05:19,961 INFO L87 Difference]: Start difference. First operand 1600 states and 2196 transitions. Second operand has 103 states, 103 states have (on average 2.1262135922330097) internal successors, (219), 102 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:32,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:32,458 INFO L93 Difference]: Finished difference Result 3024 states and 4230 transitions. [2022-01-31 18:05:32,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 18:05:32,459 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.1262135922330097) internal successors, (219), 102 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1203 [2022-01-31 18:05:32,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:32,460 INFO L225 Difference]: With dead ends: 3024 [2022-01-31 18:05:32,460 INFO L226 Difference]: Without dead ends: 1629 [2022-01-31 18:05:32,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 18:05:32,463 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7506 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1726 mSolverCounterSat, 1232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7506 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1232 IncrementalHoareTripleChecker+Valid, 1726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:32,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7506 Valid, 33 Invalid, 2958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1232 Valid, 1726 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 18:05:32,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2022-01-31 18:05:33,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1616. [2022-01-31 18:05:33,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1611 states have (on average 1.3743016759776536) internal successors, (2214), 1611 states have internal predecessors, (2214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:33,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2218 transitions. [2022-01-31 18:05:33,376 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2218 transitions. Word has length 1203 [2022-01-31 18:05:33,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:33,376 INFO L470 AbstractCegarLoop]: Abstraction has 1616 states and 2218 transitions. [2022-01-31 18:05:33,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.1262135922330097) internal successors, (219), 102 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:33,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2218 transitions. [2022-01-31 18:05:33,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1216 [2022-01-31 18:05:33,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:33,386 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:33,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 18:05:33,386 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:33,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:33,387 INFO L85 PathProgramCache]: Analyzing trace with hash -802972727, now seen corresponding path program 99 times [2022-01-31 18:05:33,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:33,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805522827] [2022-01-31 18:05:33,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:33,388 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:33,388 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:33,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:33,399 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:37,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:37,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:05:37,135 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:37,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805522827] [2022-01-31 18:05:37,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1805522827] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:37,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:37,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 18:05:37,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729119943] [2022-01-31 18:05:37,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:37,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 18:05:37,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:37,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 18:05:37,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 18:05:37,139 INFO L87 Difference]: Start difference. First operand 1616 states and 2218 transitions. Second operand has 104 states, 104 states have (on average 2.125) internal successors, (221), 103 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:48,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:48,430 INFO L93 Difference]: Finished difference Result 3054 states and 4272 transitions. [2022-01-31 18:05:48,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 18:05:48,430 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.125) internal successors, (221), 103 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 1215 [2022-01-31 18:05:48,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:48,432 INFO L225 Difference]: With dead ends: 3054 [2022-01-31 18:05:48,432 INFO L226 Difference]: Without dead ends: 1645 [2022-01-31 18:05:48,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 18:05:48,435 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6494 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1778 mSolverCounterSat, 1072 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6494 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1072 IncrementalHoareTripleChecker+Valid, 1778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:48,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6494 Valid, 58 Invalid, 2850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1072 Valid, 1778 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 18:05:48,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2022-01-31 18:05:49,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1632. [2022-01-31 18:05:49,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1627 states have (on average 1.3743085433312845) internal successors, (2236), 1627 states have internal predecessors, (2236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:49,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 2240 transitions. [2022-01-31 18:05:49,479 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 2240 transitions. Word has length 1215 [2022-01-31 18:05:49,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:49,480 INFO L470 AbstractCegarLoop]: Abstraction has 1632 states and 2240 transitions. [2022-01-31 18:05:49,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.125) internal successors, (221), 103 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:05:49,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 2240 transitions. [2022-01-31 18:05:49,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1228 [2022-01-31 18:05:49,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:49,490 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 101, 101, 101, 101, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:49,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 18:05:49,490 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:49,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:49,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1809580924, now seen corresponding path program 100 times [2022-01-31 18:05:49,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:49,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126267627] [2022-01-31 18:05:49,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:49,492 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:49,492 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:49,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:49,503 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:53,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:05:53,422 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:53,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126267627] [2022-01-31 18:05:53,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2126267627] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:53,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:53,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 18:05:53,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309306297] [2022-01-31 18:05:53,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:53,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 18:05:53,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:53,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 18:05:53,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 18:05:53,426 INFO L87 Difference]: Start difference. First operand 1632 states and 2240 transitions. Second operand has 105 states, 105 states have (on average 2.123809523809524) internal successors, (223), 104 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:06,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:06,035 INFO L93 Difference]: Finished difference Result 3084 states and 4314 transitions. [2022-01-31 18:06:06,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 18:06:06,035 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.123809523809524) internal successors, (223), 104 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1227 [2022-01-31 18:06:06,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:06,037 INFO L225 Difference]: With dead ends: 3084 [2022-01-31 18:06:06,037 INFO L226 Difference]: Without dead ends: 1661 [2022-01-31 18:06:06,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 18:06:06,040 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6990 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1781 mSolverCounterSat, 1150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6990 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1150 IncrementalHoareTripleChecker+Valid, 1781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:06,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6990 Valid, 48 Invalid, 2931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1150 Valid, 1781 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 18:06:06,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2022-01-31 18:06:07,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1648. [2022-01-31 18:06:07,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1643 states have (on average 1.3743152769324407) internal successors, (2258), 1643 states have internal predecessors, (2258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:07,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2262 transitions. [2022-01-31 18:06:07,098 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2262 transitions. Word has length 1227 [2022-01-31 18:06:07,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:07,098 INFO L470 AbstractCegarLoop]: Abstraction has 1648 states and 2262 transitions. [2022-01-31 18:06:07,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.123809523809524) internal successors, (223), 104 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:07,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2262 transitions. [2022-01-31 18:06:07,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1240 [2022-01-31 18:06:07,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:07,108 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:07,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 18:06:07,108 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:07,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:07,108 INFO L85 PathProgramCache]: Analyzing trace with hash 48186597, now seen corresponding path program 101 times [2022-01-31 18:06:07,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:07,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318601265] [2022-01-31 18:06:07,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:07,110 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:07,110 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:07,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:07,121 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:11,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:11,228 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 18:06:11,228 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:11,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318601265] [2022-01-31 18:06:11,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [318601265] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:11,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:11,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 18:06:11,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275596287] [2022-01-31 18:06:11,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:11,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 18:06:11,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:11,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 18:06:11,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 18:06:11,230 INFO L87 Difference]: Start difference. First operand 1648 states and 2262 transitions. Second operand has 106 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 105 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:22,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:22,042 INFO L93 Difference]: Finished difference Result 3114 states and 4356 transitions. [2022-01-31 18:06:22,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 18:06:22,042 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 105 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1239 [2022-01-31 18:06:22,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:22,044 INFO L225 Difference]: With dead ends: 3114 [2022-01-31 18:06:22,044 INFO L226 Difference]: Without dead ends: 1677 [2022-01-31 18:06:22,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 18:06:22,047 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 8357 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 1364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8357 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 3148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1364 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:22,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8357 Valid, 38 Invalid, 3148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1364 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 18:06:22,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2022-01-31 18:06:22,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1664. [2022-01-31 18:06:22,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1659 states have (on average 1.3743218806509945) internal successors, (2280), 1659 states have internal predecessors, (2280), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:22,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 2284 transitions. [2022-01-31 18:06:22,968 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 2284 transitions. Word has length 1239 [2022-01-31 18:06:22,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:22,968 INFO L470 AbstractCegarLoop]: Abstraction has 1664 states and 2284 transitions. [2022-01-31 18:06:22,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 105 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:22,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 2284 transitions. [2022-01-31 18:06:22,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1252 [2022-01-31 18:06:22,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:22,978 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:22,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 18:06:22,978 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:22,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:22,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1715968480, now seen corresponding path program 102 times [2022-01-31 18:06:22,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:22,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774027806] [2022-01-31 18:06:22,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:22,980 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:22,980 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:22,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:22,991 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:26,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:06:26,778 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:26,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774027806] [2022-01-31 18:06:26,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [774027806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:26,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:26,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 18:06:26,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221188928] [2022-01-31 18:06:26,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:26,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 18:06:26,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:26,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 18:06:26,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 18:06:26,781 INFO L87 Difference]: Start difference. First operand 1664 states and 2284 transitions. Second operand has 107 states, 107 states have (on average 2.121495327102804) internal successors, (227), 106 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:37,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:37,706 INFO L93 Difference]: Finished difference Result 3144 states and 4398 transitions. [2022-01-31 18:06:37,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 18:06:37,707 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.121495327102804) internal successors, (227), 106 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 1251 [2022-01-31 18:06:37,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:37,708 INFO L225 Difference]: With dead ends: 3144 [2022-01-31 18:06:37,708 INFO L226 Difference]: Without dead ends: 1693 [2022-01-31 18:06:37,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 18:06:37,711 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7332 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 1207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7332 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 3029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1207 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:37,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7332 Valid, 53 Invalid, 3029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1207 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 18:06:37,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2022-01-31 18:06:38,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1680. [2022-01-31 18:06:38,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1675 states have (on average 1.3743283582089552) internal successors, (2302), 1675 states have internal predecessors, (2302), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:38,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2306 transitions. [2022-01-31 18:06:38,624 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2306 transitions. Word has length 1251 [2022-01-31 18:06:38,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:38,624 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 2306 transitions. [2022-01-31 18:06:38,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.121495327102804) internal successors, (227), 106 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:38,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2306 transitions. [2022-01-31 18:06:38,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1264 [2022-01-31 18:06:38,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:38,635 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 104, 104, 104, 104, 104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:38,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 18:06:38,635 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:38,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:38,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1723704319, now seen corresponding path program 103 times [2022-01-31 18:06:38,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:38,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147226486] [2022-01-31 18:06:38,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:38,637 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:38,637 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:38,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:38,663 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:42,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:42,588 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 18:06:42,588 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:42,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147226486] [2022-01-31 18:06:42,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1147226486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:42,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:42,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 18:06:42,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078629866] [2022-01-31 18:06:42,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:42,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 18:06:42,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:42,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 18:06:42,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 18:06:42,591 INFO L87 Difference]: Start difference. First operand 1680 states and 2306 transitions. Second operand has 108 states, 108 states have (on average 2.1203703703703702) internal successors, (229), 107 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:54,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:54,032 INFO L93 Difference]: Finished difference Result 3174 states and 4440 transitions. [2022-01-31 18:06:54,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 18:06:54,033 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.1203703703703702) internal successors, (229), 107 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1263 [2022-01-31 18:06:54,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:54,035 INFO L225 Difference]: With dead ends: 3174 [2022-01-31 18:06:54,035 INFO L226 Difference]: Without dead ends: 1709 [2022-01-31 18:06:54,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 18:06:54,037 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7074 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1846 mSolverCounterSat, 1164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7074 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 3010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1164 IncrementalHoareTripleChecker+Valid, 1846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:54,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7074 Valid, 58 Invalid, 3010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1164 Valid, 1846 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 18:06:54,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2022-01-31 18:06:54,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1696. [2022-01-31 18:06:54,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1691 states have (on average 1.374334713187463) internal successors, (2324), 1691 states have internal predecessors, (2324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:54,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2328 transitions. [2022-01-31 18:06:54,997 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2328 transitions. Word has length 1263 [2022-01-31 18:06:54,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:54,998 INFO L470 AbstractCegarLoop]: Abstraction has 1696 states and 2328 transitions. [2022-01-31 18:06:54,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.1203703703703702) internal successors, (229), 107 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:06:54,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2328 transitions. [2022-01-31 18:06:55,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1276 [2022-01-31 18:06:55,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:55,008 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 105, 105, 105, 105, 105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:55,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 18:06:55,008 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:55,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:55,009 INFO L85 PathProgramCache]: Analyzing trace with hash -195300036, now seen corresponding path program 104 times [2022-01-31 18:06:55,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:55,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101056779] [2022-01-31 18:06:55,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:55,010 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:55,010 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:55,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:55,021 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:58,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:58,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:06:58,907 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:58,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101056779] [2022-01-31 18:06:58,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2101056779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:58,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:58,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 18:06:58,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314308435] [2022-01-31 18:06:58,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:58,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 18:06:58,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:58,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 18:06:58,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 18:06:58,910 INFO L87 Difference]: Start difference. First operand 1696 states and 2328 transitions. Second operand has 109 states, 109 states have (on average 2.1192660550458715) internal successors, (231), 108 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:10,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:07:10,592 INFO L93 Difference]: Finished difference Result 3204 states and 4482 transitions. [2022-01-31 18:07:10,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 18:07:10,592 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.1192660550458715) internal successors, (231), 108 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1275 [2022-01-31 18:07:10,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:07:10,594 INFO L225 Difference]: With dead ends: 3204 [2022-01-31 18:07:10,594 INFO L226 Difference]: Without dead ends: 1725 [2022-01-31 18:07:10,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 18:07:10,597 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7596 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1863 mSolverCounterSat, 1245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7596 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 3108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1245 IncrementalHoareTripleChecker+Valid, 1863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:07:10,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7596 Valid, 58 Invalid, 3108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1245 Valid, 1863 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 18:07:10,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2022-01-31 18:07:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1712. [2022-01-31 18:07:11,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1707 states have (on average 1.374340949033392) internal successors, (2346), 1707 states have internal predecessors, (2346), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:11,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2350 transitions. [2022-01-31 18:07:11,575 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2350 transitions. Word has length 1275 [2022-01-31 18:07:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:07:11,575 INFO L470 AbstractCegarLoop]: Abstraction has 1712 states and 2350 transitions. [2022-01-31 18:07:11,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.1192660550458715) internal successors, (231), 108 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:11,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2350 transitions. [2022-01-31 18:07:11,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1288 [2022-01-31 18:07:11,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:07:11,586 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 106, 106, 106, 106, 106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:07:11,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 18:07:11,586 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:07:11,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:07:11,587 INFO L85 PathProgramCache]: Analyzing trace with hash -845684451, now seen corresponding path program 105 times [2022-01-31 18:07:11,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:07:11,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515306595] [2022-01-31 18:07:11,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:07:11,588 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:07:11,588 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:07:11,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:07:11,604 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:07:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:15,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:07:15,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:15,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:07:15,605 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:07:15,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515306595] [2022-01-31 18:07:15,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [515306595] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:07:15,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:07:15,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 18:07:15,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399685928] [2022-01-31 18:07:15,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:07:15,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 18:07:15,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:07:15,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 18:07:15,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 18:07:15,607 INFO L87 Difference]: Start difference. First operand 1712 states and 2350 transitions. Second operand has 110 states, 110 states have (on average 2.118181818181818) internal successors, (233), 109 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:27,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:07:27,790 INFO L93 Difference]: Finished difference Result 3234 states and 4524 transitions. [2022-01-31 18:07:27,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 18:07:27,790 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.118181818181818) internal successors, (233), 109 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 1287 [2022-01-31 18:07:27,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:07:27,792 INFO L225 Difference]: With dead ends: 3234 [2022-01-31 18:07:27,792 INFO L226 Difference]: Without dead ends: 1741 [2022-01-31 18:07:27,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 18:07:27,795 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6935 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 1143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6935 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 3023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1143 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:07:27,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6935 Valid, 58 Invalid, 3023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1143 Valid, 1880 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 18:07:27,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2022-01-31 18:07:28,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1728. [2022-01-31 18:07:28,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1723 states have (on average 1.3743470690655832) internal successors, (2368), 1723 states have internal predecessors, (2368), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:28,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2372 transitions. [2022-01-31 18:07:28,790 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2372 transitions. Word has length 1287 [2022-01-31 18:07:28,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:07:28,790 INFO L470 AbstractCegarLoop]: Abstraction has 1728 states and 2372 transitions. [2022-01-31 18:07:28,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.118181818181818) internal successors, (233), 109 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:28,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2372 transitions. [2022-01-31 18:07:28,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1300 [2022-01-31 18:07:28,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:07:28,801 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 107, 107, 107, 107, 107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:07:28,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 18:07:28,801 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:07:28,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:07:28,802 INFO L85 PathProgramCache]: Analyzing trace with hash -432009576, now seen corresponding path program 106 times [2022-01-31 18:07:28,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:07:28,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557128496] [2022-01-31 18:07:28,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:07:28,803 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:07:28,803 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:07:28,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:07:28,814 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:07:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:32,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:07:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:07:32,840 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:07:32,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557128496] [2022-01-31 18:07:32,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1557128496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:07:32,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:07:32,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 18:07:32,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024799321] [2022-01-31 18:07:32,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:07:32,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 18:07:32,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:07:32,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 18:07:32,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 18:07:32,843 INFO L87 Difference]: Start difference. First operand 1728 states and 2372 transitions. Second operand has 111 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 110 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:07:45,260 INFO L93 Difference]: Finished difference Result 3264 states and 4566 transitions. [2022-01-31 18:07:45,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 18:07:45,260 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 110 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1299 [2022-01-31 18:07:45,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:07:45,262 INFO L225 Difference]: With dead ends: 3264 [2022-01-31 18:07:45,262 INFO L226 Difference]: Without dead ends: 1757 [2022-01-31 18:07:45,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 18:07:45,265 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6820 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1904 mSolverCounterSat, 1128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6820 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 3032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1128 IncrementalHoareTripleChecker+Valid, 1904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:07:45,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6820 Valid, 63 Invalid, 3032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1128 Valid, 1904 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 18:07:45,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2022-01-31 18:07:46,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 1744. [2022-01-31 18:07:46,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1739 states have (on average 1.3743530764807361) internal successors, (2390), 1739 states have internal predecessors, (2390), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:46,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 2394 transitions. [2022-01-31 18:07:46,284 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 2394 transitions. Word has length 1299 [2022-01-31 18:07:46,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:07:46,284 INFO L470 AbstractCegarLoop]: Abstraction has 1744 states and 2394 transitions. [2022-01-31 18:07:46,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 110 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:07:46,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 2394 transitions. [2022-01-31 18:07:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1312 [2022-01-31 18:07:46,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:07:46,296 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 108, 108, 108, 108, 108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:07:46,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 18:07:46,296 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:07:46,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:07:46,296 INFO L85 PathProgramCache]: Analyzing trace with hash 858444857, now seen corresponding path program 107 times [2022-01-31 18:07:46,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:07:46,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17726601] [2022-01-31 18:07:46,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:07:46,298 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:07:46,298 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:07:46,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:07:46,309 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:07:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:50,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:07:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:50,425 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 18:07:50,425 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:07:50,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17726601] [2022-01-31 18:07:50,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [17726601] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:07:50,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:07:50,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 18:07:50,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245375251] [2022-01-31 18:07:50,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:07:50,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 18:07:50,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:07:50,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 18:07:50,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 18:07:50,428 INFO L87 Difference]: Start difference. First operand 1744 states and 2394 transitions. Second operand has 112 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 111 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:02,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:02,626 INFO L93 Difference]: Finished difference Result 3294 states and 4608 transitions. [2022-01-31 18:08:02,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 18:08:02,626 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 111 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1311 [2022-01-31 18:08:02,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:02,628 INFO L225 Difference]: With dead ends: 3294 [2022-01-31 18:08:02,628 INFO L226 Difference]: Without dead ends: 1773 [2022-01-31 18:08:02,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 18:08:02,631 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7212 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1900 mSolverCounterSat, 1188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7212 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 3088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1188 IncrementalHoareTripleChecker+Valid, 1900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:02,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7212 Valid, 48 Invalid, 3088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1188 Valid, 1900 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 18:08:02,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2022-01-31 18:08:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1760. [2022-01-31 18:08:03,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1755 states have (on average 1.3743589743589744) internal successors, (2412), 1755 states have internal predecessors, (2412), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:03,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 2416 transitions. [2022-01-31 18:08:03,673 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 2416 transitions. Word has length 1311 [2022-01-31 18:08:03,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:03,673 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 2416 transitions. [2022-01-31 18:08:03,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 111 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:03,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 2416 transitions. [2022-01-31 18:08:03,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1324 [2022-01-31 18:08:03,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:03,685 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 109, 109, 109, 109, 109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:03,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 18:08:03,685 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:03,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:03,685 INFO L85 PathProgramCache]: Analyzing trace with hash 433251828, now seen corresponding path program 108 times [2022-01-31 18:08:03,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:03,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905890908] [2022-01-31 18:08:03,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:03,687 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:03,687 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:03,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:03,699 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:07,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:08:07,891 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:07,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905890908] [2022-01-31 18:08:07,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [905890908] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:07,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:07,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 18:08:07,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122508725] [2022-01-31 18:08:07,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:07,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 18:08:07,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:07,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 18:08:07,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 18:08:07,895 INFO L87 Difference]: Start difference. First operand 1760 states and 2416 transitions. Second operand has 113 states, 113 states have (on average 2.1150442477876106) internal successors, (239), 112 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:20,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:20,620 INFO L93 Difference]: Finished difference Result 3324 states and 4650 transitions. [2022-01-31 18:08:20,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 18:08:20,620 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.1150442477876106) internal successors, (239), 112 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 1323 [2022-01-31 18:08:20,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:20,622 INFO L225 Difference]: With dead ends: 3324 [2022-01-31 18:08:20,622 INFO L226 Difference]: Without dead ends: 1789 [2022-01-31 18:08:20,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 18:08:20,625 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7344 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1903 mSolverCounterSat, 1208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7344 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 3111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1208 IncrementalHoareTripleChecker+Valid, 1903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:20,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7344 Valid, 38 Invalid, 3111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1208 Valid, 1903 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 18:08:20,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2022-01-31 18:08:21,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1776. [2022-01-31 18:08:21,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1771 states have (on average 1.3743647656691136) internal successors, (2434), 1771 states have internal predecessors, (2434), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:21,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 2438 transitions. [2022-01-31 18:08:21,681 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 2438 transitions. Word has length 1323 [2022-01-31 18:08:21,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:21,681 INFO L470 AbstractCegarLoop]: Abstraction has 1776 states and 2438 transitions. [2022-01-31 18:08:21,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.1150442477876106) internal successors, (239), 112 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:21,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 2438 transitions. [2022-01-31 18:08:21,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1336 [2022-01-31 18:08:21,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:21,693 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 110, 110, 110, 110, 110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:21,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 18:08:21,693 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:21,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:21,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1447441749, now seen corresponding path program 109 times [2022-01-31 18:08:21,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:21,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380542667] [2022-01-31 18:08:21,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:21,695 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:21,695 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:21,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:21,708 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:26,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:08:26,003 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:26,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380542667] [2022-01-31 18:08:26,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1380542667] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:26,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:26,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 18:08:26,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234150515] [2022-01-31 18:08:26,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:26,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 18:08:26,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:26,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 18:08:26,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 18:08:26,007 INFO L87 Difference]: Start difference. First operand 1776 states and 2438 transitions. Second operand has 114 states, 114 states have (on average 2.1140350877192984) internal successors, (241), 113 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:38,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:38,877 INFO L93 Difference]: Finished difference Result 3354 states and 4692 transitions. [2022-01-31 18:08:38,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 18:08:38,878 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.1140350877192984) internal successors, (241), 113 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1335 [2022-01-31 18:08:38,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:38,880 INFO L225 Difference]: With dead ends: 3354 [2022-01-31 18:08:38,880 INFO L226 Difference]: Without dead ends: 1805 [2022-01-31 18:08:38,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 18:08:38,884 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7502 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1927 mSolverCounterSat, 1238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7502 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1238 IncrementalHoareTripleChecker+Valid, 1927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:38,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7502 Valid, 43 Invalid, 3165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1238 Valid, 1927 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 18:08:38,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2022-01-31 18:08:39,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1792. [2022-01-31 18:08:39,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1787 states have (on average 1.374370453273643) internal successors, (2456), 1787 states have internal predecessors, (2456), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:39,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 2460 transitions. [2022-01-31 18:08:39,925 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 2460 transitions. Word has length 1335 [2022-01-31 18:08:39,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:39,925 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 2460 transitions. [2022-01-31 18:08:39,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.1140350877192984) internal successors, (241), 113 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:08:39,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 2460 transitions. [2022-01-31 18:08:39,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1348 [2022-01-31 18:08:39,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:39,937 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 111, 111, 111, 111, 111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:39,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 18:08:39,937 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:39,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:39,937 INFO L85 PathProgramCache]: Analyzing trace with hash -2097972400, now seen corresponding path program 110 times [2022-01-31 18:08:39,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:39,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729554736] [2022-01-31 18:08:39,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:39,939 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:39,939 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:39,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:39,952 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:44,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:44,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:08:44,334 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:44,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729554736] [2022-01-31 18:08:44,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [729554736] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:44,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:44,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 18:08:44,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498370177] [2022-01-31 18:08:44,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:44,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 18:08:44,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:44,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 18:08:44,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 18:08:44,337 INFO L87 Difference]: Start difference. First operand 1792 states and 2460 transitions. Second operand has 115 states, 115 states have (on average 2.1130434782608694) internal successors, (243), 114 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)