/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_init6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:37:50,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:37:50,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:37:50,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:37:50,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:37:50,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:37:50,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:37:50,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:37:50,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:37:50,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:37:50,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:37:50,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:37:50,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:37:50,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:37:50,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:37:50,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:37:50,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:37:50,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:37:50,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:37:50,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:37:50,351 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 17:37:50,360 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:37:50,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:37:50,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:37:50,361 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:37:50,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:37:50,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:37:50,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:37:50,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:37:50,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:37:50,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:37:50,362 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:37:50,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:37:50,363 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:37:50,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:37:50,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:37:50,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:37:50,363 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:37:50,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:37:50,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:37:50,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:37:50,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:37:50,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:37:50,364 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:37:50,364 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:37:50,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:37:50,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:37:50,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:37:50,560 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:37:50,561 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:37:50,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2022-01-31 17:37:50,608 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1eb136b99/81745f4959f849de8e923bba45249794/FLAG6b40714e2 [2022-01-31 17:37:50,995 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:37:50,995 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2022-01-31 17:37:51,009 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1eb136b99/81745f4959f849de8e923bba45249794/FLAG6b40714e2 [2022-01-31 17:37:51,416 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1eb136b99/81745f4959f849de8e923bba45249794 [2022-01-31 17:37:51,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:37:51,419 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:37:51,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:37:51,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:37:51,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:37:51,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:37:51" (1/1) ... [2022-01-31 17:37:51,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c959cfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:37:51, skipping insertion in model container [2022-01-31 17:37:51,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:37:51" (1/1) ... [2022-01-31 17:37:51,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:37:51,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:37:51,557 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_init6_ground-2.i[816,829] [2022-01-31 17:37:51,566 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:37:51,570 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:37:51,581 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_init6_ground-2.i[816,829] [2022-01-31 17:37:51,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:37:51,594 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:37:51,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:37:51 WrapperNode [2022-01-31 17:37:51,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:37:51,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:37:51,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:37:51,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:37:51,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:37:51" (1/1) ... [2022-01-31 17:37:51,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:37:51" (1/1) ... [2022-01-31 17:37:51,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:37:51" (1/1) ... [2022-01-31 17:37:51,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:37:51" (1/1) ... [2022-01-31 17:37:51,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:37:51" (1/1) ... [2022-01-31 17:37:51,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:37:51" (1/1) ... [2022-01-31 17:37:51,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:37:51" (1/1) ... [2022-01-31 17:37:51,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:37:51,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:37:51,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:37:51,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:37:51,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:37:51" (1/1) ... [2022-01-31 17:37:51,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:37:51,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:37:51,637 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 17:37:51,641 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 17:37:51,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:37:51,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:37:51,661 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:37:51,661 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:37:51,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:37:51,662 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:37:51,662 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:37:51,662 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:37:51,662 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:37:51,662 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:37:51,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:37:51,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:37:51,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:37:51,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:37:51,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:37:51,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:37:51,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:37:51,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:37:51,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:37:51,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:37:51,712 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:37:51,713 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:37:51,867 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:37:51,887 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:37:51,887 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-01-31 17:37:51,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:37:51 BoogieIcfgContainer [2022-01-31 17:37:51,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:37:51,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:37:51,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:37:51,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:37:51,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:37:51" (1/3) ... [2022-01-31 17:37:51,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b2f6ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:37:51, skipping insertion in model container [2022-01-31 17:37:51,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:37:51" (2/3) ... [2022-01-31 17:37:51,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b2f6ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:37:51, skipping insertion in model container [2022-01-31 17:37:51,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:37:51" (3/3) ... [2022-01-31 17:37:51,894 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-2.i [2022-01-31 17:37:51,897 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:37:51,897 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:37:51,951 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:37:51,956 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 17:37:51,956 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:37:51,966 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.64) internal successors, (41), 26 states have internal predecessors, (41), 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 17:37:51,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 17:37:51,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:51,976 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] [2022-01-31 17:37:51,976 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:51,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:51,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1222854357, now seen corresponding path program 1 times [2022-01-31 17:37:51,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:51,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347124573] [2022-01-31 17:37:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:52,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:52,038 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:52,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:52,157 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:52,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347124573] [2022-01-31 17:37:52,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [347124573] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:52,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:52,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:37:52,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218895561] [2022-01-31 17:37:52,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:52,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:37:52,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:52,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:37:52,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:37:52,187 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.64) internal successors, (41), 26 states have internal predecessors, (41), 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 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:52,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:52,235 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2022-01-31 17:37:52,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:37:52,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 17:37:52,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:52,245 INFO L225 Difference]: With dead ends: 59 [2022-01-31 17:37:52,245 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 17:37:52,248 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 17:37:52,251 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 17:37:52,251 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 17:37:52,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 17:37:52,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-31 17:37:52,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:52,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-01-31 17:37:52,279 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2022-01-31 17:37:52,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:52,279 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-01-31 17:37:52,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:52,279 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-01-31 17:37:52,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 17:37:52,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:52,281 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] [2022-01-31 17:37:52,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:37:52,281 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:52,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:52,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1596173277, now seen corresponding path program 1 times [2022-01-31 17:37:52,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:52,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280738117] [2022-01-31 17:37:52,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:52,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:52,286 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:52,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:52,361 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:52,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280738117] [2022-01-31 17:37:52,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [280738117] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:52,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:52,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:37:52,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009229823] [2022-01-31 17:37:52,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:52,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:37:52,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:52,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:37:52,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:37:52,364 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:52,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:52,438 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2022-01-31 17:37:52,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:37:52,439 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 17:37:52,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:52,440 INFO L225 Difference]: With dead ends: 55 [2022-01-31 17:37:52,440 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 17:37:52,443 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 17:37:52,444 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:52,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 34 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:37:52,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 17:37:52,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-31 17:37:52,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:52,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-01-31 17:37:52,458 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2022-01-31 17:37:52,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:52,459 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-01-31 17:37:52,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:52,459 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-01-31 17:37:52,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 17:37:52,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:52,460 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, 1, 1] [2022-01-31 17:37:52,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:37:52,461 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:52,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:52,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1926484928, now seen corresponding path program 1 times [2022-01-31 17:37:52,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:52,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906343170] [2022-01-31 17:37:52,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:52,480 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:52,480 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:52,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:52,483 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:52,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:52,554 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:52,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906343170] [2022-01-31 17:37:52,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [906343170] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:52,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:52,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:37:52,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686196565] [2022-01-31 17:37:52,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:52,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:37:52,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:52,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:37:52,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:37:52,557 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 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 17:37:52,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:52,657 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2022-01-31 17:37:52,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:37:52,658 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 17:37:52,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:52,659 INFO L225 Difference]: With dead ends: 66 [2022-01-31 17:37:52,659 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 17:37:52,660 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 17:37:52,664 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:52,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:37:52,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 17:37:52,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-31 17:37:52,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:52,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-01-31 17:37:52,677 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 29 [2022-01-31 17:37:52,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:52,677 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-01-31 17:37:52,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 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 17:37:52,678 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-01-31 17:37:52,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 17:37:52,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:52,678 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:52,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:37:52,679 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:52,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:52,679 INFO L85 PathProgramCache]: Analyzing trace with hash -2112926269, now seen corresponding path program 2 times [2022-01-31 17:37:52,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:52,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111470813] [2022-01-31 17:37:52,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:52,681 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:52,681 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:52,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:52,684 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:52,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:52,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:52,738 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:52,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111470813] [2022-01-31 17:37:52,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2111470813] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:52,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:52,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:37:52,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096074261] [2022-01-31 17:37:52,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:52,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:37:52,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:52,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:37:52,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:37:52,740 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:52,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:52,844 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2022-01-31 17:37:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:37:52,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 17:37:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:52,846 INFO L225 Difference]: With dead ends: 77 [2022-01-31 17:37:52,846 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 17:37:52,846 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 17:37:52,850 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:52,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:37:52,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 17:37:52,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-01-31 17:37:52,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:52,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-01-31 17:37:52,855 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 35 [2022-01-31 17:37:52,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:52,855 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-01-31 17:37:52,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:52,856 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-01-31 17:37:52,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 17:37:52,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:52,856 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:52,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:37:52,857 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:52,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:52,857 INFO L85 PathProgramCache]: Analyzing trace with hash 618312736, now seen corresponding path program 3 times [2022-01-31 17:37:52,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:52,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987345711] [2022-01-31 17:37:52,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:52,858 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:52,858 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:52,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:52,865 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:52,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:52,950 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:52,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987345711] [2022-01-31 17:37:52,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1987345711] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:52,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:52,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:37:52,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493195936] [2022-01-31 17:37:52,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:52,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:37:52,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:52,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:37:52,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:37:52,952 INFO L87 Difference]: Start difference. First operand 46 states and 52 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 17:37:53,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:53,109 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2022-01-31 17:37:53,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:37:53,109 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 41 [2022-01-31 17:37:53,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:53,110 INFO L225 Difference]: With dead ends: 88 [2022-01-31 17:37:53,110 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 17:37:53,110 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 17:37:53,110 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:53,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:37:53,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 17:37:53,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-01-31 17:37:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:53,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2022-01-31 17:37:53,116 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 41 [2022-01-31 17:37:53,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:53,116 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2022-01-31 17:37:53,117 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 17:37:53,117 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2022-01-31 17:37:53,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 17:37:53,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:53,118 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:53,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:37:53,118 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:53,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:53,122 INFO L85 PathProgramCache]: Analyzing trace with hash 465190755, now seen corresponding path program 4 times [2022-01-31 17:37:53,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:53,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094839503] [2022-01-31 17:37:53,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:53,124 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:53,124 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:53,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:53,125 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:53,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:53,232 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 17:37:53,232 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:53,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094839503] [2022-01-31 17:37:53,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1094839503] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:53,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:53,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:37:53,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780820602] [2022-01-31 17:37:53,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:53,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:37:53,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:53,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:37:53,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:37:53,235 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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 17:37:53,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:53,381 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2022-01-31 17:37:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:37:53,382 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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 47 [2022-01-31 17:37:53,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:53,382 INFO L225 Difference]: With dead ends: 99 [2022-01-31 17:37:53,382 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 17:37:53,383 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 17:37:53,383 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:53,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:37:53,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 17:37:53,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-01-31 17:37:53,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2022-01-31 17:37:53,390 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 47 [2022-01-31 17:37:53,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:53,390 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2022-01-31 17:37:53,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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 17:37:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2022-01-31 17:37:53,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 17:37:53,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:53,391 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:53,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:37:53,392 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:53,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:53,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1968243712, now seen corresponding path program 5 times [2022-01-31 17:37:53,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:53,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894556720] [2022-01-31 17:37:53,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:53,393 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:53,394 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:53,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:53,395 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:53,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:53,473 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:53,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894556720] [2022-01-31 17:37:53,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [894556720] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:53,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:53,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:37:53,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653262104] [2022-01-31 17:37:53,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:53,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:37:53,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:53,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:37:53,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:37:53,475 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:53,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:53,614 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2022-01-31 17:37:53,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:37:53,614 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-01-31 17:37:53,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:53,615 INFO L225 Difference]: With dead ends: 110 [2022-01-31 17:37:53,615 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 17:37:53,616 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 17:37:53,616 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:53,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:37:53,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 17:37:53,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-01-31 17:37:53,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 58 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:53,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2022-01-31 17:37:53,623 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 53 [2022-01-31 17:37:53,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:53,623 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2022-01-31 17:37:53,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:53,623 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2022-01-31 17:37:53,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 17:37:53,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:53,624 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:53,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:37:53,624 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:53,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:53,624 INFO L85 PathProgramCache]: Analyzing trace with hash 251341059, now seen corresponding path program 6 times [2022-01-31 17:37:53,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:53,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653320206] [2022-01-31 17:37:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:53,626 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:53,626 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:53,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:53,627 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:53,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:53,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:53,715 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:53,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653320206] [2022-01-31 17:37:53,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [653320206] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:53,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:53,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:37:53,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157583776] [2022-01-31 17:37:53,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:53,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:37:53,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:53,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:37:53,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:37:53,716 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:53,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:53,861 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2022-01-31 17:37:53,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:37:53,861 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 17:37:53,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:53,864 INFO L225 Difference]: With dead ends: 121 [2022-01-31 17:37:53,864 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 17:37:53,867 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 17:37:53,868 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:53,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:37:53,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 17:37:53,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-01-31 17:37:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.109375) internal successors, (71), 64 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2022-01-31 17:37:53,889 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 59 [2022-01-31 17:37:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:53,889 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2022-01-31 17:37:53,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:53,890 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2022-01-31 17:37:53,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 17:37:53,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:53,890 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:53,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:37:53,891 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:53,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:53,891 INFO L85 PathProgramCache]: Analyzing trace with hash 693181408, now seen corresponding path program 7 times [2022-01-31 17:37:53,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:53,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587477999] [2022-01-31 17:37:53,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:53,892 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:53,892 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:53,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:53,894 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:54,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:54,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:54,043 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:54,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587477999] [2022-01-31 17:37:54,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [587477999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:54,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:54,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:37:54,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304747195] [2022-01-31 17:37:54,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:54,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:37:54,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:54,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:37:54,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:37:54,045 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 17:37:54,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:54,201 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2022-01-31 17:37:54,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:37:54,202 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 65 [2022-01-31 17:37:54,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:54,202 INFO L225 Difference]: With dead ends: 132 [2022-01-31 17:37:54,203 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 17:37:54,203 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 17:37:54,205 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:54,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:37:54,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 17:37:54,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-01-31 17:37:54,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.1) internal successors, (77), 70 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:54,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2022-01-31 17:37:54,216 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2022-01-31 17:37:54,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:54,217 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2022-01-31 17:37:54,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 17:37:54,217 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2022-01-31 17:37:54,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 17:37:54,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:54,219 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:54,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:37:54,220 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:54,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:54,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1636824413, now seen corresponding path program 8 times [2022-01-31 17:37:54,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:54,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144203150] [2022-01-31 17:37:54,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:54,222 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:54,222 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:54,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:54,223 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:54,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:54,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:54,348 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:54,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144203150] [2022-01-31 17:37:54,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1144203150] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:54,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:54,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:37:54,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553511882] [2022-01-31 17:37:54,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:54,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:37:54,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:54,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:37:54,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:37:54,350 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:54,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:54,516 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2022-01-31 17:37:54,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:37:54,516 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 17:37:54,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:54,517 INFO L225 Difference]: With dead ends: 143 [2022-01-31 17:37:54,517 INFO L226 Difference]: Without dead ends: 82 [2022-01-31 17:37:54,518 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 17:37:54,518 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:54,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:37:54,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-31 17:37:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-01-31 17:37:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 76 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2022-01-31 17:37:54,523 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 71 [2022-01-31 17:37:54,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:54,523 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2022-01-31 17:37:54,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:54,523 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2022-01-31 17:37:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 17:37:54,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:54,524 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:54,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:37:54,524 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:54,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:54,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1243413440, now seen corresponding path program 9 times [2022-01-31 17:37:54,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:54,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159088283] [2022-01-31 17:37:54,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:54,525 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:54,526 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:54,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:54,527 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:54,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:54,618 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:54,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159088283] [2022-01-31 17:37:54,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [159088283] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:54,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:54,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:37:54,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029640433] [2022-01-31 17:37:54,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:54,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:37:54,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:54,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:37:54,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:37:54,619 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 17:37:54,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:54,831 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2022-01-31 17:37:54,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:37:54,831 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 77 [2022-01-31 17:37:54,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:54,832 INFO L225 Difference]: With dead ends: 154 [2022-01-31 17:37:54,832 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 17:37:54,832 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 17:37:54,832 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:54,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:37:54,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 17:37:54,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-01-31 17:37:54,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 82 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:54,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2022-01-31 17:37:54,837 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 77 [2022-01-31 17:37:54,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:54,837 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2022-01-31 17:37:54,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 17:37:54,837 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2022-01-31 17:37:54,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:37:54,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:54,838 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:54,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:37:54,838 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:54,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:54,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1909005245, now seen corresponding path program 10 times [2022-01-31 17:37:54,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:54,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329482460] [2022-01-31 17:37:54,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:54,840 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:54,840 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:54,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:54,841 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:54,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:54,947 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:54,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329482460] [2022-01-31 17:37:54,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1329482460] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:54,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:54,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:37:54,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145483636] [2022-01-31 17:37:54,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:54,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:37:54,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:54,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:37:54,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:37:54,949 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:55,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:55,160 INFO L93 Difference]: Finished difference Result 165 states and 182 transitions. [2022-01-31 17:37:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:37:55,160 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 17:37:55,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:55,161 INFO L225 Difference]: With dead ends: 165 [2022-01-31 17:37:55,161 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 17:37:55,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:37:55,162 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:55,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:37:55,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 17:37:55,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-01-31 17:37:55,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.0795454545454546) internal successors, (95), 88 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:55,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2022-01-31 17:37:55,167 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 83 [2022-01-31 17:37:55,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:55,167 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2022-01-31 17:37:55,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:55,167 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2022-01-31 17:37:55,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 17:37:55,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:55,168 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:55,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:37:55,168 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:55,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:55,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1601610656, now seen corresponding path program 11 times [2022-01-31 17:37:55,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:55,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532363580] [2022-01-31 17:37:55,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:55,169 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:55,169 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:55,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:55,171 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:55,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:55,296 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:55,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532363580] [2022-01-31 17:37:55,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [532363580] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:55,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:55,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:37:55,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991165175] [2022-01-31 17:37:55,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:55,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:37:55,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:55,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:37:55,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:37:55,297 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:55,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:55,546 INFO L93 Difference]: Finished difference Result 176 states and 193 transitions. [2022-01-31 17:37:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:37:55,546 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-01-31 17:37:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:55,547 INFO L225 Difference]: With dead ends: 176 [2022-01-31 17:37:55,547 INFO L226 Difference]: Without dead ends: 100 [2022-01-31 17:37:55,547 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 17:37:55,548 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:55,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 59 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:37:55,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-31 17:37:55,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-01-31 17:37:55,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.074468085106383) internal successors, (101), 94 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2022-01-31 17:37:55,552 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 89 [2022-01-31 17:37:55,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:55,552 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2022-01-31 17:37:55,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:55,552 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2022-01-31 17:37:55,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 17:37:55,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:55,553 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:55,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:37:55,553 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:55,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:55,553 INFO L85 PathProgramCache]: Analyzing trace with hash 65910243, now seen corresponding path program 12 times [2022-01-31 17:37:55,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:55,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336541710] [2022-01-31 17:37:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:55,555 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:55,555 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:55,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:55,556 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:55,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:55,674 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:55,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336541710] [2022-01-31 17:37:55,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1336541710] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:55,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:55,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:37:55,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509222896] [2022-01-31 17:37:55,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:55,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:37:55,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:55,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:37:55,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:37:55,675 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:55,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:55,923 INFO L93 Difference]: Finished difference Result 187 states and 204 transitions. [2022-01-31 17:37:55,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:37:55,924 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-01-31 17:37:55,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:55,924 INFO L225 Difference]: With dead ends: 187 [2022-01-31 17:37:55,924 INFO L226 Difference]: Without dead ends: 106 [2022-01-31 17:37:55,925 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 17:37:55,925 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:55,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:37:55,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-31 17:37:55,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-01-31 17:37:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 100 states have (on average 1.07) internal successors, (107), 100 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:55,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 112 transitions. [2022-01-31 17:37:55,939 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 112 transitions. Word has length 95 [2022-01-31 17:37:55,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:55,939 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 112 transitions. [2022-01-31 17:37:55,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:55,940 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 112 transitions. [2022-01-31 17:37:55,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 17:37:55,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:55,940 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:55,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:37:55,940 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:55,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:55,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1885334656, now seen corresponding path program 13 times [2022-01-31 17:37:55,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:55,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632016623] [2022-01-31 17:37:55,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:55,942 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:55,942 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:55,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:55,943 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:56,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:56,077 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:56,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632016623] [2022-01-31 17:37:56,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [632016623] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:56,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:56,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:37:56,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124063239] [2022-01-31 17:37:56,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:56,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:37:56,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:56,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:37:56,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:37:56,078 INFO L87 Difference]: Start difference. First operand 106 states and 112 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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 17:37:56,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:56,350 INFO L93 Difference]: Finished difference Result 198 states and 215 transitions. [2022-01-31 17:37:56,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:37:56,350 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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 101 [2022-01-31 17:37:56,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:56,351 INFO L225 Difference]: With dead ends: 198 [2022-01-31 17:37:56,351 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 17:37:56,351 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 17:37:56,352 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:56,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:37:56,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 17:37:56,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-01-31 17:37:56,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.0660377358490567) internal successors, (113), 106 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2022-01-31 17:37:56,356 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 101 [2022-01-31 17:37:56,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:56,357 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2022-01-31 17:37:56,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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 17:37:56,357 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2022-01-31 17:37:56,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 17:37:56,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:56,357 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:56,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:37:56,358 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:56,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:56,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1722974083, now seen corresponding path program 14 times [2022-01-31 17:37:56,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:56,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748371589] [2022-01-31 17:37:56,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:56,359 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:56,359 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:56,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:56,360 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:56,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:56,501 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 17:37:56,501 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:56,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748371589] [2022-01-31 17:37:56,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [748371589] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:56,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:56,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:37:56,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785615791] [2022-01-31 17:37:56,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:56,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:37:56,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:56,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:37:56,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:37:56,502 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:56,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:56,814 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2022-01-31 17:37:56,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:37:56,814 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-01-31 17:37:56,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:56,815 INFO L225 Difference]: With dead ends: 209 [2022-01-31 17:37:56,815 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 17:37:56,815 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 17:37:56,816 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:56,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:37:56,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 17:37:56,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-01-31 17:37:56,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 112 states have (on average 1.0625) internal successors, (119), 112 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:56,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2022-01-31 17:37:56,820 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 107 [2022-01-31 17:37:56,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:56,821 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2022-01-31 17:37:56,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:56,821 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2022-01-31 17:37:56,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 17:37:56,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:56,821 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:56,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:37:56,821 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:56,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:56,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1084535968, now seen corresponding path program 15 times [2022-01-31 17:37:56,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:56,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517140463] [2022-01-31 17:37:56,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:56,823 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:56,823 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:56,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:56,824 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:56,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:56,983 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:56,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517140463] [2022-01-31 17:37:56,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [517140463] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:56,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:56,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:37:56,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267552260] [2022-01-31 17:37:56,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:56,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:37:56,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:56,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:37:56,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:37:56,984 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 17:37:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:57,321 INFO L93 Difference]: Finished difference Result 220 states and 237 transitions. [2022-01-31 17:37:57,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:37:57,322 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 113 [2022-01-31 17:37:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:57,322 INFO L225 Difference]: With dead ends: 220 [2022-01-31 17:37:57,322 INFO L226 Difference]: Without dead ends: 124 [2022-01-31 17:37:57,323 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 17:37:57,323 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:57,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:37:57,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-31 17:37:57,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-01-31 17:37:57,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 118 states have (on average 1.0593220338983051) internal successors, (125), 118 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:57,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2022-01-31 17:37:57,328 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 113 [2022-01-31 17:37:57,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:57,328 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2022-01-31 17:37:57,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 17:37:57,328 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2022-01-31 17:37:57,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 17:37:57,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:57,329 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:57,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:37:57,329 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:57,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:57,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1059275043, now seen corresponding path program 16 times [2022-01-31 17:37:57,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:57,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885361113] [2022-01-31 17:37:57,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:57,330 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:57,330 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:57,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:57,332 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:57,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:57,512 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:57,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885361113] [2022-01-31 17:37:57,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [885361113] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:57,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:57,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:37:57,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711068841] [2022-01-31 17:37:57,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:57,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:37:57,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:57,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:37:57,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:37:57,513 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:57,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:57,853 INFO L93 Difference]: Finished difference Result 231 states and 248 transitions. [2022-01-31 17:37:57,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:37:57,854 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-01-31 17:37:57,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:57,854 INFO L225 Difference]: With dead ends: 231 [2022-01-31 17:37:57,854 INFO L226 Difference]: Without dead ends: 130 [2022-01-31 17:37:57,855 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 17:37:57,855 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:57,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:37:57,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-31 17:37:57,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-01-31 17:37:57,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 124 states have (on average 1.0564516129032258) internal successors, (131), 124 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:57,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 136 transitions. [2022-01-31 17:37:57,860 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 136 transitions. Word has length 119 [2022-01-31 17:37:57,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:57,860 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 136 transitions. [2022-01-31 17:37:57,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:57,860 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 136 transitions. [2022-01-31 17:37:57,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 17:37:57,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:57,861 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:57,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:37:57,861 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:57,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:57,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1310045376, now seen corresponding path program 17 times [2022-01-31 17:37:57,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:57,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796631227] [2022-01-31 17:37:57,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:57,862 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:57,862 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:57,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:57,864 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:58,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:58,064 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:58,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796631227] [2022-01-31 17:37:58,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1796631227] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:58,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:58,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:37:58,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110113124] [2022-01-31 17:37:58,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:58,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:37:58,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:58,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:37:58,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:37:58,065 INFO L87 Difference]: Start difference. First operand 130 states and 136 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:58,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:58,439 INFO L93 Difference]: Finished difference Result 242 states and 259 transitions. [2022-01-31 17:37:58,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:37:58,439 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-01-31 17:37:58,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:58,440 INFO L225 Difference]: With dead ends: 242 [2022-01-31 17:37:58,440 INFO L226 Difference]: Without dead ends: 136 [2022-01-31 17:37:58,441 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 17:37:58,441 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:58,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:37:58,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-31 17:37:58,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-01-31 17:37:58,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.0538461538461539) internal successors, (137), 130 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:58,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 142 transitions. [2022-01-31 17:37:58,447 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 142 transitions. Word has length 125 [2022-01-31 17:37:58,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:58,447 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 142 transitions. [2022-01-31 17:37:58,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:58,447 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 142 transitions. [2022-01-31 17:37:58,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 17:37:58,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:58,448 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:58,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:37:58,448 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:58,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:58,449 INFO L85 PathProgramCache]: Analyzing trace with hash 392035011, now seen corresponding path program 18 times [2022-01-31 17:37:58,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:58,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223817724] [2022-01-31 17:37:58,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:58,450 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:58,451 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:58,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:58,453 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:58,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:58,673 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:58,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223817724] [2022-01-31 17:37:58,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1223817724] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:58,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:58,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:37:58,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214608848] [2022-01-31 17:37:58,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:58,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:37:58,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:58,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:37:58,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:37:58,674 INFO L87 Difference]: Start difference. First operand 136 states and 142 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:59,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:59,053 INFO L93 Difference]: Finished difference Result 253 states and 270 transitions. [2022-01-31 17:37:59,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:37:59,054 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-01-31 17:37:59,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:59,054 INFO L225 Difference]: With dead ends: 253 [2022-01-31 17:37:59,054 INFO L226 Difference]: Without dead ends: 142 [2022-01-31 17:37:59,055 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 17:37:59,055 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:59,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 59 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:37:59,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-31 17:37:59,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-01-31 17:37:59,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 136 states have (on average 1.0514705882352942) internal successors, (143), 136 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:59,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 148 transitions. [2022-01-31 17:37:59,061 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 148 transitions. Word has length 131 [2022-01-31 17:37:59,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:59,061 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 148 transitions. [2022-01-31 17:37:59,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:59,061 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 148 transitions. [2022-01-31 17:37:59,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 17:37:59,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:59,062 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:59,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:37:59,062 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:59,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:59,062 INFO L85 PathProgramCache]: Analyzing trace with hash 688853792, now seen corresponding path program 19 times [2022-01-31 17:37:59,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:59,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802436152] [2022-01-31 17:37:59,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:59,063 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:59,063 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:59,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:59,065 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:59,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:59,291 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:59,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802436152] [2022-01-31 17:37:59,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1802436152] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:59,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:59,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:37:59,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199162755] [2022-01-31 17:37:59,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:59,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:37:59,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:59,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:37:59,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:37:59,293 INFO L87 Difference]: Start difference. First operand 142 states and 148 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 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 17:37:59,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:59,711 INFO L93 Difference]: Finished difference Result 264 states and 281 transitions. [2022-01-31 17:37:59,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:37:59,711 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 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 137 [2022-01-31 17:37:59,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:59,712 INFO L225 Difference]: With dead ends: 264 [2022-01-31 17:37:59,712 INFO L226 Difference]: Without dead ends: 148 [2022-01-31 17:37:59,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:37:59,713 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:59,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:37:59,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-31 17:37:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-01-31 17:37:59,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 142 states have (on average 1.0492957746478873) internal successors, (149), 142 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:59,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 154 transitions. [2022-01-31 17:37:59,719 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 154 transitions. Word has length 137 [2022-01-31 17:37:59,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:59,720 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 154 transitions. [2022-01-31 17:37:59,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 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 17:37:59,720 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 154 transitions. [2022-01-31 17:37:59,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 17:37:59,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:59,720 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:59,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:37:59,721 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:59,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:59,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1526770787, now seen corresponding path program 20 times [2022-01-31 17:37:59,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:59,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58988737] [2022-01-31 17:37:59,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:59,722 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:59,722 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:59,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:59,726 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:59,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:59,967 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:59,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58988737] [2022-01-31 17:37:59,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [58988737] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:59,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:59,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:37:59,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099579366] [2022-01-31 17:37:59,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:59,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:37:59,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:59,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:37:59,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:37:59,968 INFO L87 Difference]: Start difference. First operand 148 states and 154 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:00,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:00,459 INFO L93 Difference]: Finished difference Result 275 states and 292 transitions. [2022-01-31 17:38:00,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:38:00,461 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-01-31 17:38:00,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:00,462 INFO L225 Difference]: With dead ends: 275 [2022-01-31 17:38:00,462 INFO L226 Difference]: Without dead ends: 154 [2022-01-31 17:38:00,463 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 17:38:00,463 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:00,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:38:00,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-31 17:38:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-01-31 17:38:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 148 states have (on average 1.0472972972972974) internal successors, (155), 148 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 160 transitions. [2022-01-31 17:38:00,468 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 160 transitions. Word has length 143 [2022-01-31 17:38:00,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:00,468 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 160 transitions. [2022-01-31 17:38:00,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:00,469 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 160 transitions. [2022-01-31 17:38:00,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 17:38:00,469 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:00,469 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:00,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:38:00,469 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:00,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:00,470 INFO L85 PathProgramCache]: Analyzing trace with hash 84648704, now seen corresponding path program 21 times [2022-01-31 17:38:00,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:00,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100828860] [2022-01-31 17:38:00,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:00,471 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:00,471 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:00,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:00,474 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:00,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:00,744 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:00,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100828860] [2022-01-31 17:38:00,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [100828860] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:00,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:00,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:38:00,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558461171] [2022-01-31 17:38:00,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:00,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:38:00,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:00,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:38:00,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:38:00,745 INFO L87 Difference]: Start difference. First operand 154 states and 160 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 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 17:38:01,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:01,239 INFO L93 Difference]: Finished difference Result 286 states and 303 transitions. [2022-01-31 17:38:01,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:38:01,239 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 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 149 [2022-01-31 17:38:01,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:01,240 INFO L225 Difference]: With dead ends: 286 [2022-01-31 17:38:01,240 INFO L226 Difference]: Without dead ends: 160 [2022-01-31 17:38:01,241 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 17:38:01,241 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:01,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [502 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:38:01,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-31 17:38:01,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-01-31 17:38:01,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.0454545454545454) internal successors, (161), 154 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:01,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 166 transitions. [2022-01-31 17:38:01,246 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 166 transitions. Word has length 149 [2022-01-31 17:38:01,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:01,246 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 166 transitions. [2022-01-31 17:38:01,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 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 17:38:01,246 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 166 transitions. [2022-01-31 17:38:01,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 17:38:01,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:01,247 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:01,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:38:01,247 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:01,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:01,248 INFO L85 PathProgramCache]: Analyzing trace with hash 925455875, now seen corresponding path program 22 times [2022-01-31 17:38:01,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:01,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122988066] [2022-01-31 17:38:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:01,249 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:01,249 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:01,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:01,251 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:01,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:01,574 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:01,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122988066] [2022-01-31 17:38:01,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2122988066] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:01,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:01,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:38:01,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255481766] [2022-01-31 17:38:01,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:01,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:38:01,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:01,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:38:01,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:38:01,576 INFO L87 Difference]: Start difference. First operand 160 states and 166 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:02,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:02,168 INFO L93 Difference]: Finished difference Result 297 states and 314 transitions. [2022-01-31 17:38:02,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:38:02,172 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-01-31 17:38:02,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:02,174 INFO L225 Difference]: With dead ends: 297 [2022-01-31 17:38:02,174 INFO L226 Difference]: Without dead ends: 166 [2022-01-31 17:38:02,175 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 17:38:02,175 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 697 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 697 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:02,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [697 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:38:02,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-31 17:38:02,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-01-31 17:38:02,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 160 states have (on average 1.04375) internal successors, (167), 160 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:02,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 172 transitions. [2022-01-31 17:38:02,180 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 172 transitions. Word has length 155 [2022-01-31 17:38:02,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:02,180 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 172 transitions. [2022-01-31 17:38:02,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:02,181 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 172 transitions. [2022-01-31 17:38:02,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 17:38:02,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:02,182 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:02,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:38:02,182 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:02,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:02,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1688337120, now seen corresponding path program 23 times [2022-01-31 17:38:02,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:02,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880016301] [2022-01-31 17:38:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:02,185 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:02,185 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:02,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:02,189 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:02,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:02,485 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:02,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880016301] [2022-01-31 17:38:02,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [880016301] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:02,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:02,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:38:02,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789297460] [2022-01-31 17:38:02,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:02,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:38:02,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:02,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:38:02,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:38:02,487 INFO L87 Difference]: Start difference. First operand 166 states and 172 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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 17:38:03,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:03,024 INFO L93 Difference]: Finished difference Result 308 states and 325 transitions. [2022-01-31 17:38:03,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:38:03,025 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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 161 [2022-01-31 17:38:03,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:03,025 INFO L225 Difference]: With dead ends: 308 [2022-01-31 17:38:03,025 INFO L226 Difference]: Without dead ends: 172 [2022-01-31 17:38:03,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:38:03,027 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:03,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:38:03,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-01-31 17:38:03,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-01-31 17:38:03,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 166 states have (on average 1.0421686746987953) internal successors, (173), 166 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:03,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 178 transitions. [2022-01-31 17:38:03,032 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 178 transitions. Word has length 161 [2022-01-31 17:38:03,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:03,032 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 178 transitions. [2022-01-31 17:38:03,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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 17:38:03,032 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 178 transitions. [2022-01-31 17:38:03,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 17:38:03,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:03,033 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:03,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:38:03,033 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:03,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:03,034 INFO L85 PathProgramCache]: Analyzing trace with hash 2054551459, now seen corresponding path program 24 times [2022-01-31 17:38:03,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:03,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108349560] [2022-01-31 17:38:03,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:03,035 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:03,035 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:03,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:03,038 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:03,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:03,330 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:03,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108349560] [2022-01-31 17:38:03,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2108349560] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:03,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:03,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:38:03,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280151426] [2022-01-31 17:38:03,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:03,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:38:03,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:03,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:38:03,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:38:03,332 INFO L87 Difference]: Start difference. First operand 172 states and 178 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:03,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:03,926 INFO L93 Difference]: Finished difference Result 319 states and 336 transitions. [2022-01-31 17:38:03,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:38:03,927 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-01-31 17:38:03,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:03,928 INFO L225 Difference]: With dead ends: 319 [2022-01-31 17:38:03,928 INFO L226 Difference]: Without dead ends: 178 [2022-01-31 17:38:03,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:38:03,929 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:03,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:38:03,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-31 17:38:03,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2022-01-31 17:38:03,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 172 states have (on average 1.0406976744186047) internal successors, (179), 172 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:03,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 184 transitions. [2022-01-31 17:38:03,941 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 184 transitions. Word has length 167 [2022-01-31 17:38:03,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:03,941 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 184 transitions. [2022-01-31 17:38:03,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:03,942 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 184 transitions. [2022-01-31 17:38:03,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-31 17:38:03,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:03,942 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:03,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:38:03,942 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:03,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:03,943 INFO L85 PathProgramCache]: Analyzing trace with hash -988538176, now seen corresponding path program 25 times [2022-01-31 17:38:03,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:03,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455667689] [2022-01-31 17:38:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:03,944 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:03,944 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:03,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:03,948 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:04,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:04,261 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:04,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455667689] [2022-01-31 17:38:04,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [455667689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:04,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:04,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:38:04,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971199067] [2022-01-31 17:38:04,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:04,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:38:04,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:04,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:38:04,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:38:04,263 INFO L87 Difference]: Start difference. First operand 178 states and 184 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 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 17:38:04,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:04,909 INFO L93 Difference]: Finished difference Result 330 states and 347 transitions. [2022-01-31 17:38:04,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:38:04,909 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 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 173 [2022-01-31 17:38:04,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:04,910 INFO L225 Difference]: With dead ends: 330 [2022-01-31 17:38:04,910 INFO L226 Difference]: Without dead ends: 184 [2022-01-31 17:38:04,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:38:04,911 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 559 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:04,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [559 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:38:04,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-31 17:38:04,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-01-31 17:38:04,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 178 states have (on average 1.0393258426966292) internal successors, (185), 178 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 190 transitions. [2022-01-31 17:38:04,917 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 190 transitions. Word has length 173 [2022-01-31 17:38:04,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:04,917 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 190 transitions. [2022-01-31 17:38:04,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 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 17:38:04,917 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 190 transitions. [2022-01-31 17:38:04,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 17:38:04,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:04,918 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:04,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:38:04,919 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:04,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:04,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1963233603, now seen corresponding path program 26 times [2022-01-31 17:38:04,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:04,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46658004] [2022-01-31 17:38:04,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:04,922 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:04,922 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:04,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:04,927 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:05,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:05,249 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:05,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46658004] [2022-01-31 17:38:05,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [46658004] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:05,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:05,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:38:05,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293397172] [2022-01-31 17:38:05,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:05,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:38:05,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:05,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:38:05,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:38:05,250 INFO L87 Difference]: Start difference. First operand 184 states and 190 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:05,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:05,899 INFO L93 Difference]: Finished difference Result 341 states and 358 transitions. [2022-01-31 17:38:05,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:38:05,899 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-01-31 17:38:05,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:05,900 INFO L225 Difference]: With dead ends: 341 [2022-01-31 17:38:05,900 INFO L226 Difference]: Without dead ends: 190 [2022-01-31 17:38:05,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:38:05,902 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:05,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:38:05,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-31 17:38:05,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2022-01-31 17:38:05,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 184 states have (on average 1.0380434782608696) internal successors, (191), 184 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:05,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 196 transitions. [2022-01-31 17:38:05,924 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 196 transitions. Word has length 179 [2022-01-31 17:38:05,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:05,925 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 196 transitions. [2022-01-31 17:38:05,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:05,925 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 196 transitions. [2022-01-31 17:38:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-31 17:38:05,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:05,926 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:05,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:38:05,926 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:05,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:05,926 INFO L85 PathProgramCache]: Analyzing trace with hash 572785312, now seen corresponding path program 27 times [2022-01-31 17:38:05,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:05,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523892358] [2022-01-31 17:38:05,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:05,927 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:05,927 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:05,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:05,931 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:06,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:06,277 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:06,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523892358] [2022-01-31 17:38:06,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [523892358] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:06,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:06,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:38:06,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808232778] [2022-01-31 17:38:06,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:06,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:38:06,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:06,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:38:06,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:38:06,279 INFO L87 Difference]: Start difference. First operand 190 states and 196 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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 17:38:06,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:06,909 INFO L93 Difference]: Finished difference Result 352 states and 369 transitions. [2022-01-31 17:38:06,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:38:06,910 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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 185 [2022-01-31 17:38:06,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:06,911 INFO L225 Difference]: With dead ends: 352 [2022-01-31 17:38:06,911 INFO L226 Difference]: Without dead ends: 196 [2022-01-31 17:38:06,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:38:06,913 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:06,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 59 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:38:06,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-01-31 17:38:06,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-01-31 17:38:06,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 190 states have (on average 1.0368421052631578) internal successors, (197), 190 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:06,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 202 transitions. [2022-01-31 17:38:06,922 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 202 transitions. Word has length 185 [2022-01-31 17:38:06,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:06,923 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 202 transitions. [2022-01-31 17:38:06,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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 17:38:06,923 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 202 transitions. [2022-01-31 17:38:06,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 17:38:06,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:06,924 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:06,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:38:06,924 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:06,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:06,924 INFO L85 PathProgramCache]: Analyzing trace with hash -663543069, now seen corresponding path program 28 times [2022-01-31 17:38:06,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:06,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031620758] [2022-01-31 17:38:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:06,925 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:06,925 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:06,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:06,929 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:07,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:07,370 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:07,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031620758] [2022-01-31 17:38:07,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1031620758] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:07,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:07,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:38:07,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837366079] [2022-01-31 17:38:07,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:07,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:38:07,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:07,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:38:07,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:38:07,371 INFO L87 Difference]: Start difference. First operand 196 states and 202 transitions. Second operand has 32 states, 32 states have (on average 1.625) internal successors, (52), 31 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:08,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:08,063 INFO L93 Difference]: Finished difference Result 363 states and 380 transitions. [2022-01-31 17:38:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:38:08,063 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 31 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-01-31 17:38:08,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:08,064 INFO L225 Difference]: With dead ends: 363 [2022-01-31 17:38:08,064 INFO L226 Difference]: Without dead ends: 202 [2022-01-31 17:38:08,065 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 17:38:08,066 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:08,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:38:08,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-31 17:38:08,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2022-01-31 17:38:08,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 196 states have (on average 1.0357142857142858) internal successors, (203), 196 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:08,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 208 transitions. [2022-01-31 17:38:08,072 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 208 transitions. Word has length 191 [2022-01-31 17:38:08,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:08,072 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 208 transitions. [2022-01-31 17:38:08,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 31 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:08,072 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 208 transitions. [2022-01-31 17:38:08,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-31 17:38:08,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:08,073 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:08,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:38:08,073 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:08,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:08,073 INFO L85 PathProgramCache]: Analyzing trace with hash 370389632, now seen corresponding path program 29 times [2022-01-31 17:38:08,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:08,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508030340] [2022-01-31 17:38:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:08,075 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:08,075 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:08,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:08,079 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:08,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:08,509 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:08,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508030340] [2022-01-31 17:38:08,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [508030340] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:08,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:08,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:38:08,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471247776] [2022-01-31 17:38:08,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:08,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:38:08,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:08,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:38:08,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:38:08,510 INFO L87 Difference]: Start difference. First operand 202 states and 208 transitions. Second operand has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 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 17:38:09,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:09,159 INFO L93 Difference]: Finished difference Result 374 states and 391 transitions. [2022-01-31 17:38:09,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:38:09,159 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 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 197 [2022-01-31 17:38:09,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:09,160 INFO L225 Difference]: With dead ends: 374 [2022-01-31 17:38:09,160 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 17:38:09,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:38:09,162 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:09,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:38:09,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 17:38:09,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-01-31 17:38:09,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 202 states have (on average 1.0346534653465347) internal successors, (209), 202 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:09,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 214 transitions. [2022-01-31 17:38:09,167 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 214 transitions. Word has length 197 [2022-01-31 17:38:09,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:09,167 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 214 transitions. [2022-01-31 17:38:09,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 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 17:38:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 214 transitions. [2022-01-31 17:38:09,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 17:38:09,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:09,168 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:09,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:38:09,168 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:09,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:09,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1746948989, now seen corresponding path program 30 times [2022-01-31 17:38:09,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:09,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29899362] [2022-01-31 17:38:09,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:09,170 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:09,170 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:09,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:09,173 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:09,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:09,637 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:09,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29899362] [2022-01-31 17:38:09,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [29899362] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:09,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:09,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:38:09,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609872053] [2022-01-31 17:38:09,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:09,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:38:09,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:09,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:38:09,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:38:09,638 INFO L87 Difference]: Start difference. First operand 208 states and 214 transitions. Second operand has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:10,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:10,313 INFO L93 Difference]: Finished difference Result 385 states and 402 transitions. [2022-01-31 17:38:10,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:38:10,314 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-01-31 17:38:10,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:10,315 INFO L225 Difference]: With dead ends: 385 [2022-01-31 17:38:10,315 INFO L226 Difference]: Without dead ends: 214 [2022-01-31 17:38:10,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:38:10,316 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:10,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:38:10,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-31 17:38:10,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-01-31 17:38:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 208 states have (on average 1.0336538461538463) internal successors, (215), 208 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 220 transitions. [2022-01-31 17:38:10,322 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 220 transitions. Word has length 203 [2022-01-31 17:38:10,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:10,322 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 220 transitions. [2022-01-31 17:38:10,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:10,322 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 220 transitions. [2022-01-31 17:38:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-31 17:38:10,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:10,323 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:10,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:38:10,323 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:10,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:10,323 INFO L85 PathProgramCache]: Analyzing trace with hash -106616224, now seen corresponding path program 31 times [2022-01-31 17:38:10,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:10,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170104144] [2022-01-31 17:38:10,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:10,324 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:10,324 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:10,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:10,328 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:10,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:10,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:10,771 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:10,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170104144] [2022-01-31 17:38:10,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [170104144] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:10,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:10,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:38:10,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589707800] [2022-01-31 17:38:10,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:10,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:38:10,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:10,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:38:10,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:38:10,773 INFO L87 Difference]: Start difference. First operand 214 states and 220 transitions. Second operand has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 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 17:38:11,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:11,542 INFO L93 Difference]: Finished difference Result 396 states and 413 transitions. [2022-01-31 17:38:11,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:38:11,544 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 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 209 [2022-01-31 17:38:11,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:11,545 INFO L225 Difference]: With dead ends: 396 [2022-01-31 17:38:11,545 INFO L226 Difference]: Without dead ends: 220 [2022-01-31 17:38:11,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:38:11,546 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:11,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:38:11,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-31 17:38:11,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2022-01-31 17:38:11,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 214 states have (on average 1.0327102803738317) internal successors, (221), 214 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:11,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 226 transitions. [2022-01-31 17:38:11,552 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 226 transitions. Word has length 209 [2022-01-31 17:38:11,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:11,552 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 226 transitions. [2022-01-31 17:38:11,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 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 17:38:11,552 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 226 transitions. [2022-01-31 17:38:11,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 17:38:11,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:11,553 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:11,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:38:11,553 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:11,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:11,553 INFO L85 PathProgramCache]: Analyzing trace with hash -941085149, now seen corresponding path program 32 times [2022-01-31 17:38:11,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:11,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195985689] [2022-01-31 17:38:11,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:11,554 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:11,554 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:11,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:11,558 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:11,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:12,008 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:12,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195985689] [2022-01-31 17:38:12,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [195985689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:12,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:12,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:38:12,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155450855] [2022-01-31 17:38:12,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:12,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:38:12,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:12,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:38:12,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:38:12,009 INFO L87 Difference]: Start difference. First operand 220 states and 226 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:12,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:12,796 INFO L93 Difference]: Finished difference Result 407 states and 424 transitions. [2022-01-31 17:38:12,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:38:12,796 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-01-31 17:38:12,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:12,797 INFO L225 Difference]: With dead ends: 407 [2022-01-31 17:38:12,797 INFO L226 Difference]: Without dead ends: 226 [2022-01-31 17:38:12,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:38:12,798 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:12,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 59 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:38:12,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-31 17:38:12,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2022-01-31 17:38:12,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 220 states have (on average 1.0318181818181817) internal successors, (227), 220 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:12,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 232 transitions. [2022-01-31 17:38:12,805 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 232 transitions. Word has length 215 [2022-01-31 17:38:12,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:12,805 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 232 transitions. [2022-01-31 17:38:12,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:12,805 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 232 transitions. [2022-01-31 17:38:12,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-31 17:38:12,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:12,806 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:12,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:38:12,807 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:12,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:12,807 INFO L85 PathProgramCache]: Analyzing trace with hash 68840000, now seen corresponding path program 33 times [2022-01-31 17:38:12,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:12,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762832296] [2022-01-31 17:38:12,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:12,808 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:12,808 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:12,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:12,813 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:13,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:13,305 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:13,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762832296] [2022-01-31 17:38:13,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1762832296] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:13,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:13,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:38:13,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131489315] [2022-01-31 17:38:13,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:13,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:38:13,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:13,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:38:13,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:38:13,306 INFO L87 Difference]: Start difference. First operand 226 states and 232 transitions. Second operand has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 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 17:38:14,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:14,089 INFO L93 Difference]: Finished difference Result 418 states and 435 transitions. [2022-01-31 17:38:14,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:38:14,089 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 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 221 [2022-01-31 17:38:14,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:14,090 INFO L225 Difference]: With dead ends: 418 [2022-01-31 17:38:14,090 INFO L226 Difference]: Without dead ends: 232 [2022-01-31 17:38:14,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:38:14,092 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 706 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 706 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:14,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [706 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:38:14,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-01-31 17:38:14,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2022-01-31 17:38:14,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 226 states have (on average 1.0309734513274336) internal successors, (233), 226 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:14,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 238 transitions. [2022-01-31 17:38:14,098 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 238 transitions. Word has length 221 [2022-01-31 17:38:14,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:14,098 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 238 transitions. [2022-01-31 17:38:14,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 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 17:38:14,098 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 238 transitions. [2022-01-31 17:38:14,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-31 17:38:14,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:14,099 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:14,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:38:14,099 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:14,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:14,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2125113283, now seen corresponding path program 34 times [2022-01-31 17:38:14,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:14,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415449481] [2022-01-31 17:38:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:14,101 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:14,101 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:14,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:14,105 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:14,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:14,603 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:14,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415449481] [2022-01-31 17:38:14,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [415449481] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:14,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:14,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:38:14,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980309449] [2022-01-31 17:38:14,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:14,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:38:14,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:14,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:38:14,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:38:14,604 INFO L87 Difference]: Start difference. First operand 232 states and 238 transitions. Second operand has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 37 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:15,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:15,446 INFO L93 Difference]: Finished difference Result 429 states and 446 transitions. [2022-01-31 17:38:15,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:38:15,447 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 37 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-01-31 17:38:15,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:15,448 INFO L225 Difference]: With dead ends: 429 [2022-01-31 17:38:15,448 INFO L226 Difference]: Without dead ends: 238 [2022-01-31 17:38:15,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:38:15,449 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 800 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 800 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:15,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [800 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:38:15,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-31 17:38:15,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2022-01-31 17:38:15,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 232 states have (on average 1.0301724137931034) internal successors, (239), 232 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:15,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 244 transitions. [2022-01-31 17:38:15,455 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 244 transitions. Word has length 227 [2022-01-31 17:38:15,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:15,455 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 244 transitions. [2022-01-31 17:38:15,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 37 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:15,455 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 244 transitions. [2022-01-31 17:38:15,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-01-31 17:38:15,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:15,456 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:15,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:38:15,456 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:15,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:15,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1798664736, now seen corresponding path program 35 times [2022-01-31 17:38:15,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:15,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046466412] [2022-01-31 17:38:15,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:15,457 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:15,457 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:15,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:15,462 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:15,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:15,945 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:15,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046466412] [2022-01-31 17:38:15,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2046466412] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:15,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:15,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:38:15,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317167790] [2022-01-31 17:38:15,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:15,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:38:15,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:15,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:38:15,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:38:15,946 INFO L87 Difference]: Start difference. First operand 238 states and 244 transitions. Second operand has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 38 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 17:38:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:16,868 INFO L93 Difference]: Finished difference Result 440 states and 457 transitions. [2022-01-31 17:38:16,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:38:16,868 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 38 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 233 [2022-01-31 17:38:16,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:16,869 INFO L225 Difference]: With dead ends: 440 [2022-01-31 17:38:16,869 INFO L226 Difference]: Without dead ends: 244 [2022-01-31 17:38:16,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:38:16,870 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 812 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 812 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:16,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [812 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:38:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-31 17:38:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-01-31 17:38:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 238 states have (on average 1.0294117647058822) internal successors, (245), 238 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:16,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 250 transitions. [2022-01-31 17:38:16,875 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 250 transitions. Word has length 233 [2022-01-31 17:38:16,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:16,876 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 250 transitions. [2022-01-31 17:38:16,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 38 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 17:38:16,876 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 250 transitions. [2022-01-31 17:38:16,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-31 17:38:16,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:16,877 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:16,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:38:16,877 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:16,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:16,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1278928541, now seen corresponding path program 36 times [2022-01-31 17:38:16,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:16,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660661033] [2022-01-31 17:38:16,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:16,878 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:16,878 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:16,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:16,884 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:17,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:17,409 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:17,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660661033] [2022-01-31 17:38:17,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1660661033] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:17,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:17,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:38:17,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699880867] [2022-01-31 17:38:17,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:17,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:38:17,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:17,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:38:17,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:38:17,410 INFO L87 Difference]: Start difference. First operand 244 states and 250 transitions. Second operand has 40 states, 40 states have (on average 1.5) internal successors, (60), 39 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:18,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:18,310 INFO L93 Difference]: Finished difference Result 451 states and 468 transitions. [2022-01-31 17:38:18,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:38:18,310 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.5) internal successors, (60), 39 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-01-31 17:38:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:18,311 INFO L225 Difference]: With dead ends: 451 [2022-01-31 17:38:18,311 INFO L226 Difference]: Without dead ends: 250 [2022-01-31 17:38:18,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:38:18,313 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 777 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:18,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [777 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:38:18,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-01-31 17:38:18,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2022-01-31 17:38:18,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 244 states have (on average 1.028688524590164) internal successors, (251), 244 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:18,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 256 transitions. [2022-01-31 17:38:18,318 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 256 transitions. Word has length 239 [2022-01-31 17:38:18,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:18,319 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 256 transitions. [2022-01-31 17:38:18,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.5) internal successors, (60), 39 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:18,319 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 256 transitions. [2022-01-31 17:38:18,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-01-31 17:38:18,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:18,320 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:18,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:38:18,320 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:18,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:18,321 INFO L85 PathProgramCache]: Analyzing trace with hash -2093465088, now seen corresponding path program 37 times [2022-01-31 17:38:18,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:18,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719018754] [2022-01-31 17:38:18,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:18,323 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:18,323 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:18,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:18,328 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:18,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:18,945 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:18,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719018754] [2022-01-31 17:38:18,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [719018754] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:18,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:18,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:38:18,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200768718] [2022-01-31 17:38:18,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:18,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:38:18,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:18,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:38:18,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:38:18,946 INFO L87 Difference]: Start difference. First operand 250 states and 256 transitions. Second operand has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 40 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 17:38:19,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:19,926 INFO L93 Difference]: Finished difference Result 462 states and 479 transitions. [2022-01-31 17:38:19,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:38:19,926 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 40 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 245 [2022-01-31 17:38:19,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:19,927 INFO L225 Difference]: With dead ends: 462 [2022-01-31 17:38:19,927 INFO L226 Difference]: Without dead ends: 256 [2022-01-31 17:38:19,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:38:19,929 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 883 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 883 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:19,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [883 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:38:19,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-01-31 17:38:19,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-01-31 17:38:19,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.028) internal successors, (257), 250 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 262 transitions. [2022-01-31 17:38:19,935 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 262 transitions. Word has length 245 [2022-01-31 17:38:19,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:19,935 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 262 transitions. [2022-01-31 17:38:19,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 40 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 17:38:19,935 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 262 transitions. [2022-01-31 17:38:19,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-31 17:38:19,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:19,936 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:19,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:38:19,937 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:19,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:19,937 INFO L85 PathProgramCache]: Analyzing trace with hash 542475011, now seen corresponding path program 38 times [2022-01-31 17:38:19,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:19,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565283541] [2022-01-31 17:38:19,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:19,938 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:19,938 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:19,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:19,942 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:20,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:20,593 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:20,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565283541] [2022-01-31 17:38:20,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1565283541] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:20,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:20,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:38:20,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880837936] [2022-01-31 17:38:20,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:20,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:38:20,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:20,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:38:20,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:38:20,594 INFO L87 Difference]: Start difference. First operand 256 states and 262 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:21,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:21,552 INFO L93 Difference]: Finished difference Result 473 states and 490 transitions. [2022-01-31 17:38:21,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:38:21,553 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2022-01-31 17:38:21,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:21,554 INFO L225 Difference]: With dead ends: 473 [2022-01-31 17:38:21,554 INFO L226 Difference]: Without dead ends: 262 [2022-01-31 17:38:21,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:38:21,556 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 856 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 856 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:21,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [856 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:38:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-31 17:38:21,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2022-01-31 17:38:21,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 256 states have (on average 1.02734375) internal successors, (263), 256 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:21,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 268 transitions. [2022-01-31 17:38:21,562 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 268 transitions. Word has length 251 [2022-01-31 17:38:21,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:21,562 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 268 transitions. [2022-01-31 17:38:21,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:21,562 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 268 transitions. [2022-01-31 17:38:21,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-01-31 17:38:21,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:21,563 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:21,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:38:21,563 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:21,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:21,563 INFO L85 PathProgramCache]: Analyzing trace with hash -555427360, now seen corresponding path program 39 times [2022-01-31 17:38:21,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:21,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741882098] [2022-01-31 17:38:21,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:21,564 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:21,564 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:21,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:21,570 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:22,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:22,162 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:22,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741882098] [2022-01-31 17:38:22,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1741882098] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:22,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:22,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:38:22,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821601630] [2022-01-31 17:38:22,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:22,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:38:22,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:22,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:38:22,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:38:22,163 INFO L87 Difference]: Start difference. First operand 262 states and 268 transitions. Second operand has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 42 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 17:38:23,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:23,158 INFO L93 Difference]: Finished difference Result 484 states and 501 transitions. [2022-01-31 17:38:23,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:38:23,158 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 42 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 257 [2022-01-31 17:38:23,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:23,159 INFO L225 Difference]: With dead ends: 484 [2022-01-31 17:38:23,159 INFO L226 Difference]: Without dead ends: 268 [2022-01-31 17:38:23,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:38:23,161 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 770 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 770 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:23,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [770 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:38:23,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-01-31 17:38:23,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2022-01-31 17:38:23,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 262 states have (on average 1.0267175572519085) internal successors, (269), 262 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:23,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 274 transitions. [2022-01-31 17:38:23,167 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 274 transitions. Word has length 257 [2022-01-31 17:38:23,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:23,167 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 274 transitions. [2022-01-31 17:38:23,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 42 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 17:38:23,167 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 274 transitions. [2022-01-31 17:38:23,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-31 17:38:23,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:23,168 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:23,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:38:23,168 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:23,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:23,168 INFO L85 PathProgramCache]: Analyzing trace with hash 519693475, now seen corresponding path program 40 times [2022-01-31 17:38:23,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:23,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637542252] [2022-01-31 17:38:23,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:23,169 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:23,169 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:23,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:23,175 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:23,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:23,833 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:23,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637542252] [2022-01-31 17:38:23,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1637542252] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:23,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:23,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:38:23,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47610498] [2022-01-31 17:38:23,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:23,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:38:23,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:23,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:38:23,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:38:23,834 INFO L87 Difference]: Start difference. First operand 268 states and 274 transitions. Second operand has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 43 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:24,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:24,876 INFO L93 Difference]: Finished difference Result 495 states and 512 transitions. [2022-01-31 17:38:24,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:38:24,876 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 43 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-01-31 17:38:24,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:24,877 INFO L225 Difference]: With dead ends: 495 [2022-01-31 17:38:24,877 INFO L226 Difference]: Without dead ends: 274 [2022-01-31 17:38:24,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:38:24,878 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 951 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 951 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:24,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [951 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:38:24,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-01-31 17:38:24,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2022-01-31 17:38:24,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 268 states have (on average 1.0261194029850746) internal successors, (275), 268 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:24,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 280 transitions. [2022-01-31 17:38:24,884 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 280 transitions. Word has length 263 [2022-01-31 17:38:24,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:24,884 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 280 transitions. [2022-01-31 17:38:24,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 43 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:24,884 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 280 transitions. [2022-01-31 17:38:24,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-01-31 17:38:24,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:24,885 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:24,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:38:24,886 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:24,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:24,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1870477760, now seen corresponding path program 41 times [2022-01-31 17:38:24,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:24,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682204546] [2022-01-31 17:38:24,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:24,887 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:24,887 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:24,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:24,892 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:25,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:25,562 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:25,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682204546] [2022-01-31 17:38:25,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1682204546] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:25,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:25,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:38:25,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441393524] [2022-01-31 17:38:25,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:25,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:38:25,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:25,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:38:25,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:38:25,564 INFO L87 Difference]: Start difference. First operand 274 states and 280 transitions. Second operand has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 44 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 17:38:26,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:26,656 INFO L93 Difference]: Finished difference Result 506 states and 523 transitions. [2022-01-31 17:38:26,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:38:26,657 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 44 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 269 [2022-01-31 17:38:26,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:26,657 INFO L225 Difference]: With dead ends: 506 [2022-01-31 17:38:26,657 INFO L226 Difference]: Without dead ends: 280 [2022-01-31 17:38:26,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:38:26,658 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:26,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:38:26,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-01-31 17:38:26,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2022-01-31 17:38:26,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 274 states have (on average 1.0255474452554745) internal successors, (281), 274 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:26,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 286 transitions. [2022-01-31 17:38:26,665 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 286 transitions. Word has length 269 [2022-01-31 17:38:26,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:26,665 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 286 transitions. [2022-01-31 17:38:26,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 44 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 17:38:26,665 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 286 transitions. [2022-01-31 17:38:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-31 17:38:26,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:26,666 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:26,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:38:26,666 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:26,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:26,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1949286845, now seen corresponding path program 42 times [2022-01-31 17:38:26,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:26,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993620979] [2022-01-31 17:38:26,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:26,668 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:26,668 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:26,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:26,674 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:27,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:27,368 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:27,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993620979] [2022-01-31 17:38:27,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [993620979] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:27,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:27,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:38:27,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104842819] [2022-01-31 17:38:27,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:27,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:38:27,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:27,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:38:27,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:38:27,370 INFO L87 Difference]: Start difference. First operand 280 states and 286 transitions. Second operand has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 45 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:28,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:28,483 INFO L93 Difference]: Finished difference Result 517 states and 534 transitions. [2022-01-31 17:38:28,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:38:28,484 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 45 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-01-31 17:38:28,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:28,485 INFO L225 Difference]: With dead ends: 517 [2022-01-31 17:38:28,485 INFO L226 Difference]: Without dead ends: 286 [2022-01-31 17:38:28,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:38:28,492 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 843 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 843 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:28,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [843 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:38:28,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-01-31 17:38:28,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2022-01-31 17:38:28,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 280 states have (on average 1.025) internal successors, (287), 280 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:28,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 292 transitions. [2022-01-31 17:38:28,500 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 292 transitions. Word has length 275 [2022-01-31 17:38:28,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:28,500 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 292 transitions. [2022-01-31 17:38:28,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 45 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:28,500 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 292 transitions. [2022-01-31 17:38:28,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-01-31 17:38:28,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:28,501 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:28,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:38:28,502 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:28,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:28,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1530699360, now seen corresponding path program 43 times [2022-01-31 17:38:28,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:28,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026268680] [2022-01-31 17:38:28,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:28,504 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:28,504 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:28,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:28,511 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:29,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:29,193 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:29,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026268680] [2022-01-31 17:38:29,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1026268680] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:29,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:29,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:38:29,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047277062] [2022-01-31 17:38:29,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:29,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:38:29,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:29,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:38:29,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:38:29,195 INFO L87 Difference]: Start difference. First operand 286 states and 292 transitions. Second operand has 47 states, 47 states have (on average 1.425531914893617) internal successors, (67), 46 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 17:38:30,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:30,393 INFO L93 Difference]: Finished difference Result 528 states and 545 transitions. [2022-01-31 17:38:30,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:38:30,394 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.425531914893617) internal successors, (67), 46 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 281 [2022-01-31 17:38:30,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:30,395 INFO L225 Difference]: With dead ends: 528 [2022-01-31 17:38:30,395 INFO L226 Difference]: Without dead ends: 292 [2022-01-31 17:38:30,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:38:30,396 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 977 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 977 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:30,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [977 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:38:30,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-01-31 17:38:30,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2022-01-31 17:38:30,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 286 states have (on average 1.0244755244755244) internal successors, (293), 286 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:30,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 298 transitions. [2022-01-31 17:38:30,404 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 298 transitions. Word has length 281 [2022-01-31 17:38:30,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:30,404 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 298 transitions. [2022-01-31 17:38:30,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.425531914893617) internal successors, (67), 46 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 17:38:30,404 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 298 transitions. [2022-01-31 17:38:30,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-01-31 17:38:30,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:30,406 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:30,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:38:30,406 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:30,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:30,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1535733789, now seen corresponding path program 44 times [2022-01-31 17:38:30,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:30,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522154747] [2022-01-31 17:38:30,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:30,407 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:30,407 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:30,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:30,414 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:31,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:31,152 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:31,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522154747] [2022-01-31 17:38:31,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1522154747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:31,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:31,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:38:31,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995387520] [2022-01-31 17:38:31,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:31,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:38:31,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:31,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:38:31,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:38:31,154 INFO L87 Difference]: Start difference. First operand 292 states and 298 transitions. Second operand has 48 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 47 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:32,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:32,370 INFO L93 Difference]: Finished difference Result 539 states and 556 transitions. [2022-01-31 17:38:32,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:38:32,370 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 47 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 287 [2022-01-31 17:38:32,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:32,371 INFO L225 Difference]: With dead ends: 539 [2022-01-31 17:38:32,371 INFO L226 Difference]: Without dead ends: 298 [2022-01-31 17:38:32,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:38:32,372 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 956 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 956 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:32,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [956 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:38:32,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-01-31 17:38:32,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2022-01-31 17:38:32,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 292 states have (on average 1.023972602739726) internal successors, (299), 292 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:32,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 304 transitions. [2022-01-31 17:38:32,379 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 304 transitions. Word has length 287 [2022-01-31 17:38:32,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:32,379 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 304 transitions. [2022-01-31 17:38:32,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 47 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:32,379 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 304 transitions. [2022-01-31 17:38:32,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-01-31 17:38:32,380 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:32,380 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:32,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:38:32,380 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:32,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:32,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1929817728, now seen corresponding path program 45 times [2022-01-31 17:38:32,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:32,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557837373] [2022-01-31 17:38:32,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:32,382 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:32,382 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:32,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:32,388 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:33,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:33,128 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:33,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557837373] [2022-01-31 17:38:33,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1557837373] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:33,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:33,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:38:33,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907096490] [2022-01-31 17:38:33,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:33,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:38:33,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:33,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:38:33,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:38:33,131 INFO L87 Difference]: Start difference. First operand 298 states and 304 transitions. Second operand has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 48 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 17:38:34,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:34,393 INFO L93 Difference]: Finished difference Result 550 states and 567 transitions. [2022-01-31 17:38:34,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:38:34,393 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 48 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 293 [2022-01-31 17:38:34,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:34,394 INFO L225 Difference]: With dead ends: 550 [2022-01-31 17:38:34,394 INFO L226 Difference]: Without dead ends: 304 [2022-01-31 17:38:34,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:38:34,395 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 950 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 950 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:34,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [950 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:38:34,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-01-31 17:38:34,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2022-01-31 17:38:34,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 298 states have (on average 1.023489932885906) internal successors, (305), 298 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:34,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 310 transitions. [2022-01-31 17:38:34,402 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 310 transitions. Word has length 293 [2022-01-31 17:38:34,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:34,402 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 310 transitions. [2022-01-31 17:38:34,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 48 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 17:38:34,402 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 310 transitions. [2022-01-31 17:38:34,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-01-31 17:38:34,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:34,403 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:34,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:38:34,403 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:34,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:34,403 INFO L85 PathProgramCache]: Analyzing trace with hash -401942141, now seen corresponding path program 46 times [2022-01-31 17:38:34,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:34,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845959521] [2022-01-31 17:38:34,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:34,404 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:34,405 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:34,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:34,412 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:35,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:35,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:35,209 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:35,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845959521] [2022-01-31 17:38:35,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [845959521] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:35,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:35,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:38:35,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758826602] [2022-01-31 17:38:35,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:35,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:38:35,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:35,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:38:35,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:38:35,211 INFO L87 Difference]: Start difference. First operand 304 states and 310 transitions. Second operand has 50 states, 50 states have (on average 1.4) internal successors, (70), 49 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:36,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:36,571 INFO L93 Difference]: Finished difference Result 561 states and 578 transitions. [2022-01-31 17:38:36,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:38:36,572 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.4) internal successors, (70), 49 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 299 [2022-01-31 17:38:36,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:36,572 INFO L225 Difference]: With dead ends: 561 [2022-01-31 17:38:36,572 INFO L226 Difference]: Without dead ends: 310 [2022-01-31 17:38:36,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:38:36,573 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 1362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1362 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:36,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1362 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:38:36,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-01-31 17:38:36,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2022-01-31 17:38:36,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 304 states have (on average 1.0230263157894737) internal successors, (311), 304 states have internal predecessors, (311), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 316 transitions. [2022-01-31 17:38:36,581 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 316 transitions. Word has length 299 [2022-01-31 17:38:36,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:36,581 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 316 transitions. [2022-01-31 17:38:36,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.4) internal successors, (70), 49 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:36,581 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 316 transitions. [2022-01-31 17:38:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-01-31 17:38:36,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:36,582 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:36,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:38:36,582 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:36,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:36,583 INFO L85 PathProgramCache]: Analyzing trace with hash -186578592, now seen corresponding path program 47 times [2022-01-31 17:38:36,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:36,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067828715] [2022-01-31 17:38:36,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:36,584 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:36,584 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:36,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:36,591 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:37,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:37,395 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:37,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067828715] [2022-01-31 17:38:37,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2067828715] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:37,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:37,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:38:37,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863711875] [2022-01-31 17:38:37,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:37,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:38:37,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:37,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:38:37,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:38:37,397 INFO L87 Difference]: Start difference. First operand 310 states and 316 transitions. Second operand has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 50 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 17:38:38,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:38,776 INFO L93 Difference]: Finished difference Result 572 states and 589 transitions. [2022-01-31 17:38:38,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:38:38,777 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 50 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 305 [2022-01-31 17:38:38,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:38,777 INFO L225 Difference]: With dead ends: 572 [2022-01-31 17:38:38,777 INFO L226 Difference]: Without dead ends: 316 [2022-01-31 17:38:38,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:38:38,779 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 1164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1164 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:38,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1164 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:38:38,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-01-31 17:38:38,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2022-01-31 17:38:38,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 310 states have (on average 1.0225806451612902) internal successors, (317), 310 states have internal predecessors, (317), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:38,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 322 transitions. [2022-01-31 17:38:38,785 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 322 transitions. Word has length 305 [2022-01-31 17:38:38,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:38,785 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 322 transitions. [2022-01-31 17:38:38,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 50 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 17:38:38,785 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 322 transitions. [2022-01-31 17:38:38,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-01-31 17:38:38,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:38,787 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:38,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:38:38,787 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:38,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:38,787 INFO L85 PathProgramCache]: Analyzing trace with hash -148169949, now seen corresponding path program 48 times [2022-01-31 17:38:38,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:38,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201785279] [2022-01-31 17:38:38,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:38,788 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:38,788 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:38,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:38,796 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:39,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:39,660 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:39,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201785279] [2022-01-31 17:38:39,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1201785279] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:39,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:39,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:38:39,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639914380] [2022-01-31 17:38:39,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:39,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:38:39,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:39,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:38:39,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:38:39,665 INFO L87 Difference]: Start difference. First operand 316 states and 322 transitions. Second operand has 52 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 51 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:41,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:41,079 INFO L93 Difference]: Finished difference Result 583 states and 600 transitions. [2022-01-31 17:38:41,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:38:41,079 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 51 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 311 [2022-01-31 17:38:41,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:41,088 INFO L225 Difference]: With dead ends: 583 [2022-01-31 17:38:41,088 INFO L226 Difference]: Without dead ends: 322 [2022-01-31 17:38:41,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:38:41,089 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 1232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1232 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:41,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1232 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:38:41,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-01-31 17:38:41,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2022-01-31 17:38:41,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 316 states have (on average 1.0221518987341771) internal successors, (323), 316 states have internal predecessors, (323), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 328 transitions. [2022-01-31 17:38:41,095 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 328 transitions. Word has length 311 [2022-01-31 17:38:41,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:41,096 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 328 transitions. [2022-01-31 17:38:41,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 51 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:41,096 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 328 transitions. [2022-01-31 17:38:41,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-01-31 17:38:41,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:41,097 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:41,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:38:41,097 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:41,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:41,097 INFO L85 PathProgramCache]: Analyzing trace with hash -2017687232, now seen corresponding path program 49 times [2022-01-31 17:38:41,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:41,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909940125] [2022-01-31 17:38:41,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:41,099 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:41,099 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:41,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:41,107 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:41,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:41,962 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:41,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909940125] [2022-01-31 17:38:41,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [909940125] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:41,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:41,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:38:41,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360352564] [2022-01-31 17:38:41,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:41,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:38:41,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:41,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:38:41,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:38:41,963 INFO L87 Difference]: Start difference. First operand 322 states and 328 transitions. Second operand has 53 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 52 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 17:38:43,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:43,414 INFO L93 Difference]: Finished difference Result 594 states and 611 transitions. [2022-01-31 17:38:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:38:43,415 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 52 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 317 [2022-01-31 17:38:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:43,416 INFO L225 Difference]: With dead ends: 594 [2022-01-31 17:38:43,416 INFO L226 Difference]: Without dead ends: 328 [2022-01-31 17:38:43,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:38:43,417 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 1254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1254 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:43,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1254 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:38:43,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-31 17:38:43,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2022-01-31 17:38:43,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 322 states have (on average 1.0217391304347827) internal successors, (329), 322 states have internal predecessors, (329), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 334 transitions. [2022-01-31 17:38:43,426 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 334 transitions. Word has length 317 [2022-01-31 17:38:43,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:43,426 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 334 transitions. [2022-01-31 17:38:43,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 52 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 17:38:43,426 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 334 transitions. [2022-01-31 17:38:43,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-01-31 17:38:43,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:43,428 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:43,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:38:43,428 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:43,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:43,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1945457859, now seen corresponding path program 50 times [2022-01-31 17:38:43,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:43,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696489785] [2022-01-31 17:38:43,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:43,429 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:43,430 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:43,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:43,438 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:44,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:44,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:44,367 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:44,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696489785] [2022-01-31 17:38:44,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1696489785] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:44,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:44,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:38:44,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109406559] [2022-01-31 17:38:44,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:44,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:38:44,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:44,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:38:44,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:38:44,373 INFO L87 Difference]: Start difference. First operand 328 states and 334 transitions. Second operand has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 53 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:45,921 INFO L93 Difference]: Finished difference Result 605 states and 622 transitions. [2022-01-31 17:38:45,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:38:45,921 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 53 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 323 [2022-01-31 17:38:45,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:45,922 INFO L225 Difference]: With dead ends: 605 [2022-01-31 17:38:45,922 INFO L226 Difference]: Without dead ends: 334 [2022-01-31 17:38:45,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:38:45,925 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 1332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1332 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:45,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 1714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1332 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:38:45,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-01-31 17:38:45,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2022-01-31 17:38:45,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 328 states have (on average 1.021341463414634) internal successors, (335), 328 states have internal predecessors, (335), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:45,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 340 transitions. [2022-01-31 17:38:45,934 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 340 transitions. Word has length 323 [2022-01-31 17:38:45,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:45,934 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 340 transitions. [2022-01-31 17:38:45,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 53 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:45,934 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 340 transitions. [2022-01-31 17:38:45,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-01-31 17:38:45,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:45,936 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:45,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:38:45,936 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:45,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:45,936 INFO L85 PathProgramCache]: Analyzing trace with hash -280112864, now seen corresponding path program 51 times [2022-01-31 17:38:45,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:45,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410240464] [2022-01-31 17:38:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:45,939 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:45,939 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:45,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:45,947 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:46,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:46,879 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:46,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410240464] [2022-01-31 17:38:46,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1410240464] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:46,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:46,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:38:46,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277550716] [2022-01-31 17:38:46,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:46,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:38:46,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:46,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:38:46,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:38:46,880 INFO L87 Difference]: Start difference. First operand 334 states and 340 transitions. Second operand has 55 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 54 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 17:38:48,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:48,396 INFO L93 Difference]: Finished difference Result 616 states and 633 transitions. [2022-01-31 17:38:48,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:38:48,396 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 54 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 329 [2022-01-31 17:38:48,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:48,397 INFO L225 Difference]: With dead ends: 616 [2022-01-31 17:38:48,397 INFO L226 Difference]: Without dead ends: 340 [2022-01-31 17:38:48,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:38:48,399 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 1192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1192 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:48,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1192 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:38:48,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-01-31 17:38:48,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2022-01-31 17:38:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 334 states have (on average 1.0209580838323353) internal successors, (341), 334 states have internal predecessors, (341), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 346 transitions. [2022-01-31 17:38:48,406 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 346 transitions. Word has length 329 [2022-01-31 17:38:48,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:48,406 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 346 transitions. [2022-01-31 17:38:48,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 54 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 17:38:48,406 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 346 transitions. [2022-01-31 17:38:48,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2022-01-31 17:38:48,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:48,407 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:48,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:38:48,407 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:48,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:48,408 INFO L85 PathProgramCache]: Analyzing trace with hash -502823325, now seen corresponding path program 52 times [2022-01-31 17:38:48,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:48,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091342224] [2022-01-31 17:38:48,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:48,409 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:48,409 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:48,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:48,417 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:49,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:49,413 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:49,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091342224] [2022-01-31 17:38:49,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2091342224] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:49,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:49,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:38:49,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134971511] [2022-01-31 17:38:49,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:49,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:38:49,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:49,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:38:49,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:38:49,415 INFO L87 Difference]: Start difference. First operand 340 states and 346 transitions. Second operand has 56 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 55 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:50,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:50,951 INFO L93 Difference]: Finished difference Result 627 states and 644 transitions. [2022-01-31 17:38:50,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:38:50,952 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 55 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 335 [2022-01-31 17:38:50,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:50,952 INFO L225 Difference]: With dead ends: 627 [2022-01-31 17:38:50,953 INFO L226 Difference]: Without dead ends: 346 [2022-01-31 17:38:50,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:38:50,954 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 1076 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1076 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:50,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 74 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1076 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:38:50,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-01-31 17:38:50,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2022-01-31 17:38:50,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 340 states have (on average 1.0205882352941176) internal successors, (347), 340 states have internal predecessors, (347), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:50,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 352 transitions. [2022-01-31 17:38:50,961 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 352 transitions. Word has length 335 [2022-01-31 17:38:50,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:50,961 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 352 transitions. [2022-01-31 17:38:50,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 55 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:50,961 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 352 transitions. [2022-01-31 17:38:50,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2022-01-31 17:38:50,962 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:50,963 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:50,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:38:50,963 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:50,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:50,963 INFO L85 PathProgramCache]: Analyzing trace with hash -204021504, now seen corresponding path program 53 times [2022-01-31 17:38:50,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:50,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117615698] [2022-01-31 17:38:50,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:50,964 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:50,964 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:50,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:50,973 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:51,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:51,994 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:51,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117615698] [2022-01-31 17:38:51,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1117615698] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:51,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:51,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:38:51,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569589299] [2022-01-31 17:38:51,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:51,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:38:51,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:51,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:38:51,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:38:51,996 INFO L87 Difference]: Start difference. First operand 346 states and 352 transitions. Second operand has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 56 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 17:38:53,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:53,615 INFO L93 Difference]: Finished difference Result 638 states and 655 transitions. [2022-01-31 17:38:53,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:38:53,616 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 56 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 341 [2022-01-31 17:38:53,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:53,616 INFO L225 Difference]: With dead ends: 638 [2022-01-31 17:38:53,616 INFO L226 Difference]: Without dead ends: 352 [2022-01-31 17:38:53,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:38:53,617 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 1164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1164 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:53,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 1581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1164 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:38:53,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-01-31 17:38:53,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2022-01-31 17:38:53,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 346 states have (on average 1.0202312138728324) internal successors, (353), 346 states have internal predecessors, (353), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:53,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 358 transitions. [2022-01-31 17:38:53,624 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 358 transitions. Word has length 341 [2022-01-31 17:38:53,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:53,624 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 358 transitions. [2022-01-31 17:38:53,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 56 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 17:38:53,624 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 358 transitions. [2022-01-31 17:38:53,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-01-31 17:38:53,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:53,626 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:53,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:38:53,626 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:53,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:53,626 INFO L85 PathProgramCache]: Analyzing trace with hash -2038452221, now seen corresponding path program 54 times [2022-01-31 17:38:53,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:53,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031698348] [2022-01-31 17:38:53,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:53,627 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:53,628 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:53,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:53,636 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:54,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:54,654 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:54,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031698348] [2022-01-31 17:38:54,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2031698348] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:54,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:54,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:38:54,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337299591] [2022-01-31 17:38:54,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:54,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:38:54,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:54,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:38:54,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:38:54,655 INFO L87 Difference]: Start difference. First operand 352 states and 358 transitions. Second operand has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 57 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:56,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:56,356 INFO L93 Difference]: Finished difference Result 649 states and 666 transitions. [2022-01-31 17:38:56,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:38:56,357 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 57 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 347 [2022-01-31 17:38:56,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:56,357 INFO L225 Difference]: With dead ends: 649 [2022-01-31 17:38:56,357 INFO L226 Difference]: Without dead ends: 358 [2022-01-31 17:38:56,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:38:56,359 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 1360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1360 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:56,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 1783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1360 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:38:56,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-01-31 17:38:56,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2022-01-31 17:38:56,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 352 states have (on average 1.0198863636363635) internal successors, (359), 352 states have internal predecessors, (359), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:56,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 364 transitions. [2022-01-31 17:38:56,366 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 364 transitions. Word has length 347 [2022-01-31 17:38:56,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:56,366 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 364 transitions. [2022-01-31 17:38:56,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 57 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:38:56,366 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 364 transitions. [2022-01-31 17:38:56,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2022-01-31 17:38:56,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:56,368 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:56,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:38:56,368 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:56,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:56,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1676035872, now seen corresponding path program 55 times [2022-01-31 17:38:56,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:56,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824553476] [2022-01-31 17:38:56,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:56,369 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:56,369 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:56,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:56,379 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:57,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:38:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:38:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:38:57,418 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:38:57,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824553476] [2022-01-31 17:38:57,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [824553476] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:38:57,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:38:57,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:38:57,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654455572] [2022-01-31 17:38:57,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:38:57,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:38:57,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:38:57,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:38:57,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:38:57,420 INFO L87 Difference]: Start difference. First operand 358 states and 364 transitions. Second operand has 59 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 58 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 17:38:59,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:38:59,151 INFO L93 Difference]: Finished difference Result 660 states and 677 transitions. [2022-01-31 17:38:59,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:38:59,151 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 58 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 353 [2022-01-31 17:38:59,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:38:59,152 INFO L225 Difference]: With dead ends: 660 [2022-01-31 17:38:59,152 INFO L226 Difference]: Without dead ends: 364 [2022-01-31 17:38:59,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:38:59,153 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 1291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1291 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:38:59,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1291 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:38:59,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-01-31 17:38:59,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2022-01-31 17:38:59,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 358 states have (on average 1.0195530726256983) internal successors, (365), 358 states have internal predecessors, (365), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:38:59,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 370 transitions. [2022-01-31 17:38:59,160 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 370 transitions. Word has length 353 [2022-01-31 17:38:59,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:38:59,160 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 370 transitions. [2022-01-31 17:38:59,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 58 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 17:38:59,161 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 370 transitions. [2022-01-31 17:38:59,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-01-31 17:38:59,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:38:59,162 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:38:59,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:38:59,162 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:38:59,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:38:59,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1207685539, now seen corresponding path program 56 times [2022-01-31 17:38:59,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:38:59,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879299085] [2022-01-31 17:38:59,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:38:59,163 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:38:59,163 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:38:59,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:38:59,173 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:38:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:00,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:00,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:00,270 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:00,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879299085] [2022-01-31 17:39:00,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [879299085] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:00,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:00,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:39:00,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512463878] [2022-01-31 17:39:00,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:00,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:39:00,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:00,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:39:00,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:39:00,272 INFO L87 Difference]: Start difference. First operand 364 states and 370 transitions. Second operand has 60 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 59 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:02,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:02,104 INFO L93 Difference]: Finished difference Result 671 states and 688 transitions. [2022-01-31 17:39:02,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:39:02,104 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 59 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 359 [2022-01-31 17:39:02,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:02,105 INFO L225 Difference]: With dead ends: 671 [2022-01-31 17:39:02,105 INFO L226 Difference]: Without dead ends: 370 [2022-01-31 17:39:02,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:39:02,106 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 1473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1473 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:02,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 59 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1473 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:39:02,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-01-31 17:39:02,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2022-01-31 17:39:02,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 364 states have (on average 1.0192307692307692) internal successors, (371), 364 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:02,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 376 transitions. [2022-01-31 17:39:02,113 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 376 transitions. Word has length 359 [2022-01-31 17:39:02,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:02,113 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 376 transitions. [2022-01-31 17:39:02,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 59 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:02,114 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 376 transitions. [2022-01-31 17:39:02,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-01-31 17:39:02,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:02,115 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:02,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:39:02,115 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:02,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:02,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1297635520, now seen corresponding path program 57 times [2022-01-31 17:39:02,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:02,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763390290] [2022-01-31 17:39:02,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:02,117 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:02,117 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:02,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:02,127 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:03,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:03,271 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:03,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763390290] [2022-01-31 17:39:03,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1763390290] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:03,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:03,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:39:03,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825954950] [2022-01-31 17:39:03,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:03,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:39:03,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:03,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:39:03,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:39:03,273 INFO L87 Difference]: Start difference. First operand 370 states and 376 transitions. Second operand has 61 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 60 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 17:39:05,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:05,058 INFO L93 Difference]: Finished difference Result 682 states and 699 transitions. [2022-01-31 17:39:05,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:39:05,058 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 60 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 365 [2022-01-31 17:39:05,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:05,059 INFO L225 Difference]: With dead ends: 682 [2022-01-31 17:39:05,059 INFO L226 Difference]: Without dead ends: 376 [2022-01-31 17:39:05,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:39:05,060 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 1224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1224 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:05,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1224 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:39:05,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-01-31 17:39:05,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2022-01-31 17:39:05,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 370 states have (on average 1.018918918918919) internal successors, (377), 370 states have internal predecessors, (377), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:05,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 382 transitions. [2022-01-31 17:39:05,067 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 382 transitions. Word has length 365 [2022-01-31 17:39:05,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:05,068 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 382 transitions. [2022-01-31 17:39:05,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 60 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 17:39:05,068 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 382 transitions. [2022-01-31 17:39:05,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-01-31 17:39:05,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:05,069 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:05,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:39:05,069 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:05,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:05,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1902515389, now seen corresponding path program 58 times [2022-01-31 17:39:05,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:05,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656456252] [2022-01-31 17:39:05,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:05,071 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:05,071 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:05,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:05,081 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:06,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:06,241 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:06,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656456252] [2022-01-31 17:39:06,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1656456252] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:06,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:06,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:39:06,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8735441] [2022-01-31 17:39:06,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:06,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:39:06,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:06,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:39:06,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:39:06,242 INFO L87 Difference]: Start difference. First operand 376 states and 382 transitions. Second operand has 62 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 61 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:08,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:08,148 INFO L93 Difference]: Finished difference Result 693 states and 710 transitions. [2022-01-31 17:39:08,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:39:08,149 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 61 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 371 [2022-01-31 17:39:08,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:08,150 INFO L225 Difference]: With dead ends: 693 [2022-01-31 17:39:08,150 INFO L226 Difference]: Without dead ends: 382 [2022-01-31 17:39:08,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:39:08,151 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 1439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1439 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:08,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 59 Invalid, 1903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1439 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:39:08,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-01-31 17:39:08,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2022-01-31 17:39:08,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 376 states have (on average 1.0186170212765957) internal successors, (383), 376 states have internal predecessors, (383), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:08,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 388 transitions. [2022-01-31 17:39:08,158 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 388 transitions. Word has length 371 [2022-01-31 17:39:08,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:08,158 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 388 transitions. [2022-01-31 17:39:08,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 61 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:08,158 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 388 transitions. [2022-01-31 17:39:08,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-01-31 17:39:08,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:08,160 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:08,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:39:08,160 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:08,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:08,160 INFO L85 PathProgramCache]: Analyzing trace with hash -346767200, now seen corresponding path program 59 times [2022-01-31 17:39:08,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:08,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682143075] [2022-01-31 17:39:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:08,161 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:08,161 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:08,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:08,172 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:09,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:09,346 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:09,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682143075] [2022-01-31 17:39:09,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1682143075] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:09,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:09,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:39:09,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826053359] [2022-01-31 17:39:09,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:09,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:39:09,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:09,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:39:09,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:39:09,350 INFO L87 Difference]: Start difference. First operand 382 states and 388 transitions. Second operand has 63 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 62 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 17:39:11,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:11,277 INFO L93 Difference]: Finished difference Result 704 states and 721 transitions. [2022-01-31 17:39:11,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:39:11,278 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 62 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 377 [2022-01-31 17:39:11,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:11,279 INFO L225 Difference]: With dead ends: 704 [2022-01-31 17:39:11,279 INFO L226 Difference]: Without dead ends: 388 [2022-01-31 17:39:11,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:39:11,280 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 1359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1359 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:11,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1359 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:39:11,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-01-31 17:39:11,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2022-01-31 17:39:11,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 382 states have (on average 1.0183246073298429) internal successors, (389), 382 states have internal predecessors, (389), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:11,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 394 transitions. [2022-01-31 17:39:11,287 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 394 transitions. Word has length 377 [2022-01-31 17:39:11,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:11,288 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 394 transitions. [2022-01-31 17:39:11,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 62 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 17:39:11,288 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 394 transitions. [2022-01-31 17:39:11,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-01-31 17:39:11,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:11,289 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:11,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:39:11,289 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:11,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:11,290 INFO L85 PathProgramCache]: Analyzing trace with hash 603454691, now seen corresponding path program 60 times [2022-01-31 17:39:11,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:11,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983436514] [2022-01-31 17:39:11,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:11,291 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:11,291 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:11,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:11,302 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:12,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:12,559 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:12,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983436514] [2022-01-31 17:39:12,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [983436514] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:12,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:12,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:39:12,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737223002] [2022-01-31 17:39:12,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:12,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:39:12,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:12,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:39:12,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:39:12,561 INFO L87 Difference]: Start difference. First operand 388 states and 394 transitions. Second operand has 64 states, 64 states have (on average 1.3125) internal successors, (84), 63 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:14,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:14,546 INFO L93 Difference]: Finished difference Result 715 states and 732 transitions. [2022-01-31 17:39:14,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:39:14,546 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.3125) internal successors, (84), 63 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 383 [2022-01-31 17:39:14,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:14,547 INFO L225 Difference]: With dead ends: 715 [2022-01-31 17:39:14,547 INFO L226 Difference]: Without dead ends: 394 [2022-01-31 17:39:14,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:39:14,548 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 1410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1410 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:14,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 1869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1410 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:39:14,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-01-31 17:39:14,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2022-01-31 17:39:14,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 388 states have (on average 1.018041237113402) internal successors, (395), 388 states have internal predecessors, (395), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 400 transitions. [2022-01-31 17:39:14,556 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 400 transitions. Word has length 383 [2022-01-31 17:39:14,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:14,556 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 400 transitions. [2022-01-31 17:39:14,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.3125) internal successors, (84), 63 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:14,556 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 400 transitions. [2022-01-31 17:39:14,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-01-31 17:39:14,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:14,558 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:14,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:39:14,558 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:14,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:14,558 INFO L85 PathProgramCache]: Analyzing trace with hash -128913280, now seen corresponding path program 61 times [2022-01-31 17:39:14,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:14,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51456179] [2022-01-31 17:39:14,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:14,559 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:14,559 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:14,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:14,571 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:15,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:15,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:15,824 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:15,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51456179] [2022-01-31 17:39:15,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [51456179] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:15,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:15,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:39:15,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184050291] [2022-01-31 17:39:15,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:15,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:39:15,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:15,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:39:15,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:39:15,826 INFO L87 Difference]: Start difference. First operand 394 states and 400 transitions. Second operand has 65 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 64 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 17:39:17,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:17,930 INFO L93 Difference]: Finished difference Result 726 states and 743 transitions. [2022-01-31 17:39:17,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:39:17,930 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 64 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 389 [2022-01-31 17:39:17,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:17,931 INFO L225 Difference]: With dead ends: 726 [2022-01-31 17:39:17,931 INFO L226 Difference]: Without dead ends: 400 [2022-01-31 17:39:17,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:39:17,933 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 1701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1701 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:17,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 2132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1701 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:39:17,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-01-31 17:39:17,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2022-01-31 17:39:17,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 394 states have (on average 1.017766497461929) internal successors, (401), 394 states have internal predecessors, (401), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:17,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 406 transitions. [2022-01-31 17:39:17,952 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 406 transitions. Word has length 389 [2022-01-31 17:39:17,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:17,952 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 406 transitions. [2022-01-31 17:39:17,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 64 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 17:39:17,952 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 406 transitions. [2022-01-31 17:39:17,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-01-31 17:39:17,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:17,954 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:17,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:39:17,954 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:17,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:17,954 INFO L85 PathProgramCache]: Analyzing trace with hash 322176643, now seen corresponding path program 62 times [2022-01-31 17:39:17,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:17,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978977708] [2022-01-31 17:39:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:17,955 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:17,955 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:17,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:17,966 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:19,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:19,266 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:19,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978977708] [2022-01-31 17:39:19,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [978977708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:19,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:19,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:39:19,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833697509] [2022-01-31 17:39:19,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:19,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:39:19,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:19,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:39:19,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:39:19,268 INFO L87 Difference]: Start difference. First operand 400 states and 406 transitions. Second operand has 66 states, 66 states have (on average 1.303030303030303) internal successors, (86), 65 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:21,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:21,384 INFO L93 Difference]: Finished difference Result 737 states and 754 transitions. [2022-01-31 17:39:21,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:39:21,385 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.303030303030303) internal successors, (86), 65 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 395 [2022-01-31 17:39:21,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:21,386 INFO L225 Difference]: With dead ends: 737 [2022-01-31 17:39:21,386 INFO L226 Difference]: Without dead ends: 406 [2022-01-31 17:39:21,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:39:21,387 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 1458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1458 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:21,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1458 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:39:21,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-01-31 17:39:21,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 406. [2022-01-31 17:39:21,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 400 states have (on average 1.0175) internal successors, (407), 400 states have internal predecessors, (407), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:21,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 412 transitions. [2022-01-31 17:39:21,395 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 412 transitions. Word has length 395 [2022-01-31 17:39:21,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:21,395 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 412 transitions. [2022-01-31 17:39:21,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.303030303030303) internal successors, (86), 65 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:21,395 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 412 transitions. [2022-01-31 17:39:21,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-01-31 17:39:21,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:21,397 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:21,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:39:21,397 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:21,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:21,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1257314208, now seen corresponding path program 63 times [2022-01-31 17:39:21,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:21,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130943320] [2022-01-31 17:39:21,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:21,399 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:21,399 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:21,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:21,410 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:22,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:22,766 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:22,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130943320] [2022-01-31 17:39:22,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1130943320] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:22,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:22,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:39:22,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084604976] [2022-01-31 17:39:22,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:22,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:39:22,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:22,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:39:22,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:39:22,768 INFO L87 Difference]: Start difference. First operand 406 states and 412 transitions. Second operand has 67 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 66 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 17:39:24,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:24,980 INFO L93 Difference]: Finished difference Result 748 states and 765 transitions. [2022-01-31 17:39:24,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:39:24,980 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 66 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 401 [2022-01-31 17:39:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:24,981 INFO L225 Difference]: With dead ends: 748 [2022-01-31 17:39:24,981 INFO L226 Difference]: Without dead ends: 412 [2022-01-31 17:39:24,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:39:24,982 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 1593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1593 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:24,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1593 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:39:24,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-01-31 17:39:24,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 412. [2022-01-31 17:39:24,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 406 states have (on average 1.0172413793103448) internal successors, (413), 406 states have internal predecessors, (413), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:24,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 418 transitions. [2022-01-31 17:39:24,990 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 418 transitions. Word has length 401 [2022-01-31 17:39:24,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:24,990 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 418 transitions. [2022-01-31 17:39:24,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 66 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 17:39:24,990 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 418 transitions. [2022-01-31 17:39:24,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-01-31 17:39:24,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:24,992 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:24,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:39:24,992 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:24,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:24,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1997797341, now seen corresponding path program 64 times [2022-01-31 17:39:24,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:24,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240390311] [2022-01-31 17:39:24,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:24,993 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:24,993 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:24,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:25,006 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:26,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:26,394 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:26,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240390311] [2022-01-31 17:39:26,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [240390311] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:26,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:26,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:39:26,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59634074] [2022-01-31 17:39:26,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:26,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:39:26,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:26,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:39:26,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:39:26,395 INFO L87 Difference]: Start difference. First operand 412 states and 418 transitions. Second operand has 68 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 67 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:28,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:28,683 INFO L93 Difference]: Finished difference Result 759 states and 776 transitions. [2022-01-31 17:39:28,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:39:28,683 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 67 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 407 [2022-01-31 17:39:28,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:28,684 INFO L225 Difference]: With dead ends: 759 [2022-01-31 17:39:28,684 INFO L226 Difference]: Without dead ends: 418 [2022-01-31 17:39:28,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:39:28,686 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 1611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1611 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:28,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1611 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:39:28,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-31 17:39:28,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2022-01-31 17:39:28,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 412 states have (on average 1.016990291262136) internal successors, (419), 412 states have internal predecessors, (419), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:28,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 424 transitions. [2022-01-31 17:39:28,694 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 424 transitions. Word has length 407 [2022-01-31 17:39:28,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:28,694 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 424 transitions. [2022-01-31 17:39:28,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 67 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:28,694 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 424 transitions. [2022-01-31 17:39:28,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2022-01-31 17:39:28,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:28,700 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:28,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:39:28,700 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:28,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:28,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1087416384, now seen corresponding path program 65 times [2022-01-31 17:39:28,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:28,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233875866] [2022-01-31 17:39:28,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:28,701 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:28,701 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:28,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:28,715 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:30,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:30,118 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:30,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233875866] [2022-01-31 17:39:30,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [233875866] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:30,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:30,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:39:30,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215161388] [2022-01-31 17:39:30,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:30,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:39:30,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:30,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:39:30,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:39:30,120 INFO L87 Difference]: Start difference. First operand 418 states and 424 transitions. Second operand has 69 states, 69 states have (on average 1.289855072463768) internal successors, (89), 68 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 17:39:32,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:32,462 INFO L93 Difference]: Finished difference Result 770 states and 787 transitions. [2022-01-31 17:39:32,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:39:32,463 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.289855072463768) internal successors, (89), 68 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 413 [2022-01-31 17:39:32,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:32,464 INFO L225 Difference]: With dead ends: 770 [2022-01-31 17:39:32,464 INFO L226 Difference]: Without dead ends: 424 [2022-01-31 17:39:32,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:39:32,465 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 1540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 2046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1540 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:32,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 59 Invalid, 2046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1540 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:39:32,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-01-31 17:39:32,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2022-01-31 17:39:32,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 418 states have (on average 1.0167464114832536) internal successors, (425), 418 states have internal predecessors, (425), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:32,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 430 transitions. [2022-01-31 17:39:32,473 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 430 transitions. Word has length 413 [2022-01-31 17:39:32,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:32,473 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 430 transitions. [2022-01-31 17:39:32,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.289855072463768) internal successors, (89), 68 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 17:39:32,473 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 430 transitions. [2022-01-31 17:39:32,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-01-31 17:39:32,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:32,475 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:32,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:39:32,475 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:32,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:32,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1287781949, now seen corresponding path program 66 times [2022-01-31 17:39:32,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:32,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149615378] [2022-01-31 17:39:32,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:32,476 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:32,476 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:32,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:32,490 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:34,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:34,069 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:34,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149615378] [2022-01-31 17:39:34,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [149615378] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:34,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:34,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:39:34,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426340267] [2022-01-31 17:39:34,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:34,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:39:34,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:34,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:39:34,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:39:34,071 INFO L87 Difference]: Start difference. First operand 424 states and 430 transitions. Second operand has 70 states, 70 states have (on average 1.2857142857142858) internal successors, (90), 69 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:36,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:36,473 INFO L93 Difference]: Finished difference Result 781 states and 798 transitions. [2022-01-31 17:39:36,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:39:36,473 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.2857142857142858) internal successors, (90), 69 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 419 [2022-01-31 17:39:36,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:36,474 INFO L225 Difference]: With dead ends: 781 [2022-01-31 17:39:36,474 INFO L226 Difference]: Without dead ends: 430 [2022-01-31 17:39:36,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:39:36,476 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 1806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1806 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:36,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 2267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1806 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:39:36,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-01-31 17:39:36,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 430. [2022-01-31 17:39:36,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 424 states have (on average 1.0165094339622642) internal successors, (431), 424 states have internal predecessors, (431), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:36,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 436 transitions. [2022-01-31 17:39:36,483 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 436 transitions. Word has length 419 [2022-01-31 17:39:36,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:36,484 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 436 transitions. [2022-01-31 17:39:36,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.2857142857142858) internal successors, (90), 69 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:36,484 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 436 transitions. [2022-01-31 17:39:36,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2022-01-31 17:39:36,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:36,485 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:36,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:39:36,486 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:36,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:36,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1185402848, now seen corresponding path program 67 times [2022-01-31 17:39:36,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:36,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537292037] [2022-01-31 17:39:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:36,487 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:36,487 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:36,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:36,501 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:38,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:38,056 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:38,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537292037] [2022-01-31 17:39:38,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1537292037] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:38,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:38,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:39:38,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137998152] [2022-01-31 17:39:38,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:38,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:39:38,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:38,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:39:38,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:39:38,058 INFO L87 Difference]: Start difference. First operand 430 states and 436 transitions. Second operand has 71 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 70 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 17:39:40,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:40,529 INFO L93 Difference]: Finished difference Result 792 states and 809 transitions. [2022-01-31 17:39:40,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:39:40,530 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 70 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 425 [2022-01-31 17:39:40,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:40,531 INFO L225 Difference]: With dead ends: 792 [2022-01-31 17:39:40,531 INFO L226 Difference]: Without dead ends: 436 [2022-01-31 17:39:40,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:39:40,539 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 1920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1920 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:40,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 2387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1920 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:39:40,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-01-31 17:39:40,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2022-01-31 17:39:40,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 430 states have (on average 1.0162790697674418) internal successors, (437), 430 states have internal predecessors, (437), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:40,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 442 transitions. [2022-01-31 17:39:40,547 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 442 transitions. Word has length 425 [2022-01-31 17:39:40,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:40,548 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 442 transitions. [2022-01-31 17:39:40,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 70 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 17:39:40,548 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 442 transitions. [2022-01-31 17:39:40,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2022-01-31 17:39:40,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:40,549 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:40,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:39:40,550 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:40,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:40,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1580731549, now seen corresponding path program 68 times [2022-01-31 17:39:40,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:40,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876115025] [2022-01-31 17:39:40,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:40,551 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:40,551 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:40,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:40,566 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:42,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:42,099 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:42,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876115025] [2022-01-31 17:39:42,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [876115025] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:42,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:42,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:39:42,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25173065] [2022-01-31 17:39:42,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:42,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:39:42,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:42,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:39:42,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:39:42,101 INFO L87 Difference]: Start difference. First operand 436 states and 442 transitions. Second operand has 72 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 71 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:44,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:44,668 INFO L93 Difference]: Finished difference Result 803 states and 820 transitions. [2022-01-31 17:39:44,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:39:44,669 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 71 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 431 [2022-01-31 17:39:44,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:44,670 INFO L225 Difference]: With dead ends: 803 [2022-01-31 17:39:44,670 INFO L226 Difference]: Without dead ends: 442 [2022-01-31 17:39:44,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:39:44,671 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 1766 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1766 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:44,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 2239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1766 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:39:44,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-01-31 17:39:44,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2022-01-31 17:39:44,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 436 states have (on average 1.0160550458715596) internal successors, (443), 436 states have internal predecessors, (443), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:44,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 448 transitions. [2022-01-31 17:39:44,679 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 448 transitions. Word has length 431 [2022-01-31 17:39:44,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:44,679 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 448 transitions. [2022-01-31 17:39:44,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 71 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:44,680 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 448 transitions. [2022-01-31 17:39:44,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-01-31 17:39:44,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:44,681 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:44,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:39:44,681 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:44,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:44,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1525121024, now seen corresponding path program 69 times [2022-01-31 17:39:44,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:44,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256435976] [2022-01-31 17:39:44,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:44,683 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:44,683 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:44,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:44,697 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:46,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:46,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:46,264 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:46,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256435976] [2022-01-31 17:39:46,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [256435976] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:46,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:46,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:39:46,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134215822] [2022-01-31 17:39:46,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:46,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:39:46,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:46,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:39:46,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:39:46,266 INFO L87 Difference]: Start difference. First operand 442 states and 448 transitions. Second operand has 73 states, 73 states have (on average 1.273972602739726) internal successors, (93), 72 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 17:39:48,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:48,847 INFO L93 Difference]: Finished difference Result 814 states and 831 transitions. [2022-01-31 17:39:48,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:39:48,847 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.273972602739726) internal successors, (93), 72 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 437 [2022-01-31 17:39:48,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:48,848 INFO L225 Difference]: With dead ends: 814 [2022-01-31 17:39:48,848 INFO L226 Difference]: Without dead ends: 448 [2022-01-31 17:39:48,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:39:48,850 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 1822 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1822 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:48,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 2301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1822 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:39:48,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-01-31 17:39:48,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 448. [2022-01-31 17:39:48,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 442 states have (on average 1.0158371040723981) internal successors, (449), 442 states have internal predecessors, (449), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:48,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 454 transitions. [2022-01-31 17:39:48,858 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 454 transitions. Word has length 437 [2022-01-31 17:39:48,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:48,858 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 454 transitions. [2022-01-31 17:39:48,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.273972602739726) internal successors, (93), 72 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 17:39:48,858 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 454 transitions. [2022-01-31 17:39:48,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2022-01-31 17:39:48,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:48,860 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:48,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:39:48,860 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:48,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:48,861 INFO L85 PathProgramCache]: Analyzing trace with hash 631758083, now seen corresponding path program 70 times [2022-01-31 17:39:48,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:48,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274311971] [2022-01-31 17:39:48,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:48,862 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:48,862 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:48,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:48,876 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:50,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:50,465 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:50,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274311971] [2022-01-31 17:39:50,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [274311971] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:50,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:50,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 17:39:50,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526161439] [2022-01-31 17:39:50,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:50,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 17:39:50,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:50,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 17:39:50,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:39:50,467 INFO L87 Difference]: Start difference. First operand 448 states and 454 transitions. Second operand has 74 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 73 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:53,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:53,142 INFO L93 Difference]: Finished difference Result 825 states and 842 transitions. [2022-01-31 17:39:53,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 17:39:53,142 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 73 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 443 [2022-01-31 17:39:53,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:53,143 INFO L225 Difference]: With dead ends: 825 [2022-01-31 17:39:53,143 INFO L226 Difference]: Without dead ends: 454 [2022-01-31 17:39:53,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:39:53,144 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 1486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 2056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1486 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:53,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 69 Invalid, 2056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1486 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:39:53,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-01-31 17:39:53,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2022-01-31 17:39:53,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 448 states have (on average 1.015625) internal successors, (455), 448 states have internal predecessors, (455), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:53,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 460 transitions. [2022-01-31 17:39:53,152 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 460 transitions. Word has length 443 [2022-01-31 17:39:53,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:53,153 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 460 transitions. [2022-01-31 17:39:53,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 73 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:39:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 460 transitions. [2022-01-31 17:39:53,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2022-01-31 17:39:53,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:53,154 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:53,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:39:53,155 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:53,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:53,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1606379552, now seen corresponding path program 71 times [2022-01-31 17:39:53,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:53,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171543645] [2022-01-31 17:39:53,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:53,156 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:53,156 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:53,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:53,170 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:54,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:54,835 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:54,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171543645] [2022-01-31 17:39:54,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [171543645] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:54,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:54,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 17:39:54,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907676722] [2022-01-31 17:39:54,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:54,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 17:39:54,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:54,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 17:39:54,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:39:54,837 INFO L87 Difference]: Start difference. First operand 454 states and 460 transitions. Second operand has 75 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 74 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 17:39:57,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:39:57,626 INFO L93 Difference]: Finished difference Result 836 states and 853 transitions. [2022-01-31 17:39:57,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 17:39:57,627 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 74 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 449 [2022-01-31 17:39:57,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:39:57,628 INFO L225 Difference]: With dead ends: 836 [2022-01-31 17:39:57,628 INFO L226 Difference]: Without dead ends: 460 [2022-01-31 17:39:57,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:39:57,629 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 2154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2154 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:39:57,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2154 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:39:57,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-01-31 17:39:57,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 460. [2022-01-31 17:39:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 454 states have (on average 1.0154185022026432) internal successors, (461), 454 states have internal predecessors, (461), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:39:57,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 466 transitions. [2022-01-31 17:39:57,637 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 466 transitions. Word has length 449 [2022-01-31 17:39:57,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:39:57,638 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 466 transitions. [2022-01-31 17:39:57,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 74 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 17:39:57,638 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 466 transitions. [2022-01-31 17:39:57,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-01-31 17:39:57,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:39:57,640 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:39:57,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:39:57,640 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:39:57,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:39:57,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1317290333, now seen corresponding path program 72 times [2022-01-31 17:39:57,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:39:57,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081528817] [2022-01-31 17:39:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:39:57,641 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:39:57,641 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:39:57,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:39:57,657 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:39:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:59,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:39:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:39:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:39:59,355 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:39:59,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081528817] [2022-01-31 17:39:59,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2081528817] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:39:59,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:39:59,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 17:39:59,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976968021] [2022-01-31 17:39:59,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:39:59,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 17:39:59,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:39:59,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 17:39:59,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:39:59,357 INFO L87 Difference]: Start difference. First operand 460 states and 466 transitions. Second operand has 76 states, 76 states have (on average 1.263157894736842) internal successors, (96), 75 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:02,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:40:02,185 INFO L93 Difference]: Finished difference Result 847 states and 864 transitions. [2022-01-31 17:40:02,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 17:40:02,186 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.263157894736842) internal successors, (96), 75 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 455 [2022-01-31 17:40:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:40:02,187 INFO L225 Difference]: With dead ends: 847 [2022-01-31 17:40:02,187 INFO L226 Difference]: Without dead ends: 466 [2022-01-31 17:40:02,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:40:02,188 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 1877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 2408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1877 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:40:02,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 2408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1877 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:40:02,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-31 17:40:02,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 466. [2022-01-31 17:40:02,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 460 states have (on average 1.0152173913043478) internal successors, (467), 460 states have internal predecessors, (467), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:40:02,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 472 transitions. [2022-01-31 17:40:02,198 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 472 transitions. Word has length 455 [2022-01-31 17:40:02,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:40:02,198 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 472 transitions. [2022-01-31 17:40:02,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.263157894736842) internal successors, (96), 75 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:02,198 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 472 transitions. [2022-01-31 17:40:02,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2022-01-31 17:40:02,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:40:02,200 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:40:02,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:40:02,200 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:40:02,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:40:02,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1655011264, now seen corresponding path program 73 times [2022-01-31 17:40:02,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:40:02,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194847444] [2022-01-31 17:40:02,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:40:02,202 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:40:02,202 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:40:02,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:40:02,217 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:40:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:03,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:40:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:40:03,974 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:40:03,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194847444] [2022-01-31 17:40:03,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1194847444] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:40:03,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:40:03,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 17:40:03,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258164821] [2022-01-31 17:40:03,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:40:03,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 17:40:03,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:40:03,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 17:40:03,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:40:03,976 INFO L87 Difference]: Start difference. First operand 466 states and 472 transitions. Second operand has 77 states, 77 states have (on average 1.2597402597402598) internal successors, (97), 76 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 17:40:06,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:40:06,882 INFO L93 Difference]: Finished difference Result 858 states and 875 transitions. [2022-01-31 17:40:06,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 17:40:06,882 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.2597402597402598) internal successors, (97), 76 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 461 [2022-01-31 17:40:06,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:40:06,883 INFO L225 Difference]: With dead ends: 858 [2022-01-31 17:40:06,883 INFO L226 Difference]: Without dead ends: 472 [2022-01-31 17:40:06,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 17:40:06,885 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 1960 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1960 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:40:06,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 2446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1960 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:40:06,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-31 17:40:06,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 472. [2022-01-31 17:40:06,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 466 states have (on average 1.0150214592274678) internal successors, (473), 466 states have internal predecessors, (473), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:40:06,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 478 transitions. [2022-01-31 17:40:06,893 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 478 transitions. Word has length 461 [2022-01-31 17:40:06,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:40:06,893 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 478 transitions. [2022-01-31 17:40:06,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.2597402597402598) internal successors, (97), 76 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 17:40:06,893 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 478 transitions. [2022-01-31 17:40:06,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2022-01-31 17:40:06,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:40:06,895 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:40:06,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:40:06,895 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:40:06,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:40:06,895 INFO L85 PathProgramCache]: Analyzing trace with hash 962697283, now seen corresponding path program 74 times [2022-01-31 17:40:06,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:40:06,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150882958] [2022-01-31 17:40:06,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:40:06,897 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:40:06,897 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:40:06,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:40:06,912 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:40:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:08,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:40:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:08,680 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 17:40:08,681 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:40:08,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150882958] [2022-01-31 17:40:08,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [150882958] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:40:08,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:40:08,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 17:40:08,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314064199] [2022-01-31 17:40:08,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:40:08,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 17:40:08,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:40:08,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 17:40:08,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:40:08,683 INFO L87 Difference]: Start difference. First operand 472 states and 478 transitions. Second operand has 78 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 77 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:11,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:40:11,608 INFO L93 Difference]: Finished difference Result 869 states and 886 transitions. [2022-01-31 17:40:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 17:40:11,608 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 77 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 467 [2022-01-31 17:40:11,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:40:11,609 INFO L225 Difference]: With dead ends: 869 [2022-01-31 17:40:11,609 INFO L226 Difference]: Without dead ends: 478 [2022-01-31 17:40:11,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:40:11,611 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 1713 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 2256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1713 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:40:11,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 2256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1713 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:40:11,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-01-31 17:40:11,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 478. [2022-01-31 17:40:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 472 states have (on average 1.0148305084745763) internal successors, (479), 472 states have internal predecessors, (479), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:40:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 484 transitions. [2022-01-31 17:40:11,619 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 484 transitions. Word has length 467 [2022-01-31 17:40:11,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:40:11,619 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 484 transitions. [2022-01-31 17:40:11,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 77 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:11,619 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 484 transitions. [2022-01-31 17:40:11,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2022-01-31 17:40:11,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:40:11,621 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:40:11,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:40:11,621 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:40:11,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:40:11,622 INFO L85 PathProgramCache]: Analyzing trace with hash -103276640, now seen corresponding path program 75 times [2022-01-31 17:40:11,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:40:11,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678555421] [2022-01-31 17:40:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:40:11,623 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:40:11,623 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:40:11,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:40:11,638 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:40:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:13,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:40:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:40:13,470 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:40:13,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678555421] [2022-01-31 17:40:13,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1678555421] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:40:13,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:40:13,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 17:40:13,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541975546] [2022-01-31 17:40:13,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:40:13,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 17:40:13,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:40:13,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 17:40:13,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:40:13,472 INFO L87 Difference]: Start difference. First operand 478 states and 484 transitions. Second operand has 79 states, 79 states have (on average 1.2531645569620253) internal successors, (99), 78 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 17:40:16,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:40:16,523 INFO L93 Difference]: Finished difference Result 880 states and 897 transitions. [2022-01-31 17:40:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:40:16,524 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.2531645569620253) internal successors, (99), 78 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 473 [2022-01-31 17:40:16,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:40:16,525 INFO L225 Difference]: With dead ends: 880 [2022-01-31 17:40:16,525 INFO L226 Difference]: Without dead ends: 484 [2022-01-31 17:40:16,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:40:16,526 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 2095 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2095 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:40:16,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 2593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2095 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:40:16,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-01-31 17:40:16,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 484. [2022-01-31 17:40:16,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 478 states have (on average 1.0146443514644352) internal successors, (485), 478 states have internal predecessors, (485), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:40:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 490 transitions. [2022-01-31 17:40:16,535 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 490 transitions. Word has length 473 [2022-01-31 17:40:16,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:40:16,535 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 490 transitions. [2022-01-31 17:40:16,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.2531645569620253) internal successors, (99), 78 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 17:40:16,535 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 490 transitions. [2022-01-31 17:40:16,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-01-31 17:40:16,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:40:16,537 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:40:16,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:40:16,538 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:40:16,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:40:16,538 INFO L85 PathProgramCache]: Analyzing trace with hash 318204387, now seen corresponding path program 76 times [2022-01-31 17:40:16,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:40:16,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161561918] [2022-01-31 17:40:16,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:40:16,539 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:40:16,539 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:40:16,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:40:16,554 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:40:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:18,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:40:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:18,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:40:18,493 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:40:18,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161561918] [2022-01-31 17:40:18,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1161561918] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:40:18,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:40:18,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 17:40:18,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568919756] [2022-01-31 17:40:18,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:40:18,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 17:40:18,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:40:18,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 17:40:18,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:40:18,495 INFO L87 Difference]: Start difference. First operand 484 states and 490 transitions. Second operand has 80 states, 80 states have (on average 1.25) internal successors, (100), 79 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:21,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:40:21,628 INFO L93 Difference]: Finished difference Result 891 states and 908 transitions. [2022-01-31 17:40:21,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 17:40:21,628 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.25) internal successors, (100), 79 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 479 [2022-01-31 17:40:21,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:40:21,629 INFO L225 Difference]: With dead ends: 891 [2022-01-31 17:40:21,629 INFO L226 Difference]: Without dead ends: 490 [2022-01-31 17:40:21,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:40:21,631 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 1889 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 2461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1889 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:40:21,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 59 Invalid, 2461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1889 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:40:21,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-01-31 17:40:21,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2022-01-31 17:40:21,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 484 states have (on average 1.0144628099173554) internal successors, (491), 484 states have internal predecessors, (491), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:40:21,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 496 transitions. [2022-01-31 17:40:21,639 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 496 transitions. Word has length 479 [2022-01-31 17:40:21,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:40:21,640 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 496 transitions. [2022-01-31 17:40:21,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.25) internal successors, (100), 79 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:21,640 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 496 transitions. [2022-01-31 17:40:21,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2022-01-31 17:40:21,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:40:21,642 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:40:21,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:40:21,642 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:40:21,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:40:21,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1545244544, now seen corresponding path program 77 times [2022-01-31 17:40:21,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:40:21,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181272770] [2022-01-31 17:40:21,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:40:21,644 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:40:21,644 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:40:21,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:40:21,661 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:40:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:23,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:40:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:23,602 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 17:40:23,602 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:40:23,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181272770] [2022-01-31 17:40:23,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [181272770] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:40:23,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:40:23,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 17:40:23,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013212303] [2022-01-31 17:40:23,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:40:23,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 17:40:23,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:40:23,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 17:40:23,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:40:23,604 INFO L87 Difference]: Start difference. First operand 490 states and 496 transitions. Second operand has 81 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 80 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 17:40:26,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:40:26,906 INFO L93 Difference]: Finished difference Result 902 states and 919 transitions. [2022-01-31 17:40:26,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 17:40:26,906 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 80 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 485 [2022-01-31 17:40:26,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:40:26,908 INFO L225 Difference]: With dead ends: 902 [2022-01-31 17:40:26,908 INFO L226 Difference]: Without dead ends: 496 [2022-01-31 17:40:26,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 17:40:26,910 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 2301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2301 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:40:26,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 2828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2301 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:40:26,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-01-31 17:40:26,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 496. [2022-01-31 17:40:26,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 490 states have (on average 1.0142857142857142) internal successors, (497), 490 states have internal predecessors, (497), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:40:26,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 502 transitions. [2022-01-31 17:40:26,919 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 502 transitions. Word has length 485 [2022-01-31 17:40:26,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:40:26,919 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 502 transitions. [2022-01-31 17:40:26,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 80 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 17:40:26,919 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 502 transitions. [2022-01-31 17:40:26,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2022-01-31 17:40:26,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:40:26,921 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:40:26,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:40:26,921 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:40:26,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:40:26,922 INFO L85 PathProgramCache]: Analyzing trace with hash -715443325, now seen corresponding path program 78 times [2022-01-31 17:40:26,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:40:26,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177958890] [2022-01-31 17:40:26,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:40:26,923 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:40:26,923 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:40:26,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:40:26,939 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:40:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:28,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:40:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:40:28,935 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:40:28,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177958890] [2022-01-31 17:40:28,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1177958890] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:40:28,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:40:28,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 17:40:28,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499262988] [2022-01-31 17:40:28,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:40:28,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 17:40:28,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:40:28,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 17:40:28,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:40:28,937 INFO L87 Difference]: Start difference. First operand 496 states and 502 transitions. Second operand has 82 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 81 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:32,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:40:32,171 INFO L93 Difference]: Finished difference Result 913 states and 930 transitions. [2022-01-31 17:40:32,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 17:40:32,171 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 81 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 491 [2022-01-31 17:40:32,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:40:32,172 INFO L225 Difference]: With dead ends: 913 [2022-01-31 17:40:32,172 INFO L226 Difference]: Without dead ends: 502 [2022-01-31 17:40:32,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:40:32,174 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 1814 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 2398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1814 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:40:32,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 59 Invalid, 2398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1814 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:40:32,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-01-31 17:40:32,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 502. [2022-01-31 17:40:32,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 496 states have (on average 1.0141129032258065) internal successors, (503), 496 states have internal predecessors, (503), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:40:32,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 508 transitions. [2022-01-31 17:40:32,183 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 508 transitions. Word has length 491 [2022-01-31 17:40:32,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:40:32,183 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 508 transitions. [2022-01-31 17:40:32,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 81 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:32,183 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 508 transitions. [2022-01-31 17:40:32,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2022-01-31 17:40:32,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:40:32,185 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:40:32,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:40:32,185 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:40:32,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:40:32,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1043253088, now seen corresponding path program 79 times [2022-01-31 17:40:32,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:40:32,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629819203] [2022-01-31 17:40:32,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:40:32,187 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:40:32,187 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:40:32,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:40:32,208 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:40:32,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:34,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:40:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:34,205 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 17:40:34,205 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:40:34,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629819203] [2022-01-31 17:40:34,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [629819203] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:40:34,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:40:34,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 17:40:34,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258951219] [2022-01-31 17:40:34,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:40:34,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 17:40:34,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:40:34,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 17:40:34,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:40:34,209 INFO L87 Difference]: Start difference. First operand 502 states and 508 transitions. Second operand has 83 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 82 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 17:40:37,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:40:37,570 INFO L93 Difference]: Finished difference Result 924 states and 941 transitions. [2022-01-31 17:40:37,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 17:40:37,570 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 82 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 497 [2022-01-31 17:40:37,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:40:37,571 INFO L225 Difference]: With dead ends: 924 [2022-01-31 17:40:37,571 INFO L226 Difference]: Without dead ends: 508 [2022-01-31 17:40:37,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:40:37,573 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 2087 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2087 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:40:37,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 2643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2087 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:40:37,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-01-31 17:40:37,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 508. [2022-01-31 17:40:37,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 502 states have (on average 1.0139442231075697) internal successors, (509), 502 states have internal predecessors, (509), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:40:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 514 transitions. [2022-01-31 17:40:37,582 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 514 transitions. Word has length 497 [2022-01-31 17:40:37,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:40:37,582 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 514 transitions. [2022-01-31 17:40:37,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 82 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 17:40:37,582 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 514 transitions. [2022-01-31 17:40:37,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2022-01-31 17:40:37,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:40:37,584 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:40:37,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:40:37,584 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:40:37,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:40:37,584 INFO L85 PathProgramCache]: Analyzing trace with hash 959116579, now seen corresponding path program 80 times [2022-01-31 17:40:37,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:40:37,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334917495] [2022-01-31 17:40:37,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:40:37,585 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:40:37,585 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:40:37,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:40:37,605 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:40:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:39,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:40:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:40:39,694 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:40:39,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334917495] [2022-01-31 17:40:39,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1334917495] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:40:39,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:40:39,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 17:40:39,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098824492] [2022-01-31 17:40:39,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:40:39,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 17:40:39,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:40:39,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 17:40:39,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 17:40:39,696 INFO L87 Difference]: Start difference. First operand 508 states and 514 transitions. Second operand has 84 states, 84 states have (on average 1.2380952380952381) internal successors, (104), 83 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:43,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:40:43,074 INFO L93 Difference]: Finished difference Result 935 states and 952 transitions. [2022-01-31 17:40:43,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 17:40:43,074 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.2380952380952381) internal successors, (104), 83 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 503 [2022-01-31 17:40:43,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:40:43,075 INFO L225 Difference]: With dead ends: 935 [2022-01-31 17:40:43,076 INFO L226 Difference]: Without dead ends: 514 [2022-01-31 17:40:43,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 17:40:43,077 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 1697 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 2310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1697 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:40:43,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 2310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1697 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:40:43,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-01-31 17:40:43,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2022-01-31 17:40:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 508 states have (on average 1.013779527559055) internal successors, (515), 508 states have internal predecessors, (515), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:40:43,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 520 transitions. [2022-01-31 17:40:43,086 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 520 transitions. Word has length 503 [2022-01-31 17:40:43,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:40:43,086 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 520 transitions. [2022-01-31 17:40:43,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.2380952380952381) internal successors, (104), 83 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:43,086 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 520 transitions. [2022-01-31 17:40:43,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2022-01-31 17:40:43,088 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:40:43,088 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:40:43,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:40:43,089 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:40:43,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:40:43,089 INFO L85 PathProgramCache]: Analyzing trace with hash 861325120, now seen corresponding path program 81 times [2022-01-31 17:40:43,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:40:43,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211780002] [2022-01-31 17:40:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:40:43,090 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:40:43,090 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:40:43,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:40:43,110 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:40:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:45,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:40:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:45,236 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 17:40:45,236 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:40:45,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211780002] [2022-01-31 17:40:45,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1211780002] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:40:45,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:40:45,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 17:40:45,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534090217] [2022-01-31 17:40:45,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:40:45,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 17:40:45,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:40:45,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 17:40:45,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:40:45,238 INFO L87 Difference]: Start difference. First operand 514 states and 520 transitions. Second operand has 85 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 84 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 17:40:48,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:40:48,918 INFO L93 Difference]: Finished difference Result 946 states and 963 transitions. [2022-01-31 17:40:48,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 17:40:48,919 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 84 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 509 [2022-01-31 17:40:48,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:40:48,920 INFO L225 Difference]: With dead ends: 946 [2022-01-31 17:40:48,920 INFO L226 Difference]: Without dead ends: 520 [2022-01-31 17:40:48,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 17:40:48,921 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 2748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 3282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2748 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:40:48,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 3282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2748 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:40:48,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-01-31 17:40:48,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2022-01-31 17:40:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 514 states have (on average 1.0136186770428015) internal successors, (521), 514 states have internal predecessors, (521), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:40:48,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 526 transitions. [2022-01-31 17:40:48,930 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 526 transitions. Word has length 509 [2022-01-31 17:40:48,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:40:48,930 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 526 transitions. [2022-01-31 17:40:48,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 84 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 17:40:48,931 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 526 transitions. [2022-01-31 17:40:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2022-01-31 17:40:48,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:40:48,933 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:40:48,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 17:40:48,933 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:40:48,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:40:48,933 INFO L85 PathProgramCache]: Analyzing trace with hash -125522237, now seen corresponding path program 82 times [2022-01-31 17:40:48,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:40:48,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102192719] [2022-01-31 17:40:48,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:40:48,934 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:40:48,934 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:40:48,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:40:48,954 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:40:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:51,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:40:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:40:51,126 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:40:51,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102192719] [2022-01-31 17:40:51,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [102192719] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:40:51,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:40:51,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 17:40:51,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456931540] [2022-01-31 17:40:51,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:40:51,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 17:40:51,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:40:51,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 17:40:51,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 17:40:51,129 INFO L87 Difference]: Start difference. First operand 520 states and 526 transitions. Second operand has 86 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 85 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:54,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:40:54,812 INFO L93 Difference]: Finished difference Result 957 states and 974 transitions. [2022-01-31 17:40:54,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 17:40:54,812 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 85 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 515 [2022-01-31 17:40:54,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:40:54,813 INFO L225 Difference]: With dead ends: 957 [2022-01-31 17:40:54,813 INFO L226 Difference]: Without dead ends: 526 [2022-01-31 17:40:54,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 17:40:54,815 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 2218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2218 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:40:54,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2218 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:40:54,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-01-31 17:40:54,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2022-01-31 17:40:54,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 520 states have (on average 1.0134615384615384) internal successors, (527), 520 states have internal predecessors, (527), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:40:54,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 532 transitions. [2022-01-31 17:40:54,824 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 532 transitions. Word has length 515 [2022-01-31 17:40:54,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:40:54,824 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 532 transitions. [2022-01-31 17:40:54,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 85 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:40:54,825 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 532 transitions. [2022-01-31 17:40:54,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2022-01-31 17:40:54,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:40:54,827 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:40:54,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 17:40:54,827 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:40:54,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:40:54,827 INFO L85 PathProgramCache]: Analyzing trace with hash -850096352, now seen corresponding path program 83 times [2022-01-31 17:40:54,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:40:54,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377027162] [2022-01-31 17:40:54,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:40:54,828 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:40:54,829 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:40:54,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:40:54,867 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:40:55,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:57,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:40:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:40:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:40:57,065 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:40:57,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377027162] [2022-01-31 17:40:57,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1377027162] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:40:57,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:40:57,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 17:40:57,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497907987] [2022-01-31 17:40:57,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:40:57,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 17:40:57,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:40:57,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 17:40:57,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:40:57,068 INFO L87 Difference]: Start difference. First operand 526 states and 532 transitions. Second operand has 87 states, 87 states have (on average 1.2298850574712643) internal successors, (107), 86 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 17:41:00,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:41:00,743 INFO L93 Difference]: Finished difference Result 968 states and 985 transitions. [2022-01-31 17:41:00,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 17:41:00,744 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.2298850574712643) internal successors, (107), 86 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 521 [2022-01-31 17:41:00,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:41:00,745 INFO L225 Difference]: With dead ends: 968 [2022-01-31 17:41:00,745 INFO L226 Difference]: Without dead ends: 532 [2022-01-31 17:41:00,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 17:41:00,747 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 1970 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 2601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1970 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:41:00,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 2601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1970 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:41:00,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-01-31 17:41:00,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 532. [2022-01-31 17:41:00,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 526 states have (on average 1.0133079847908746) internal successors, (533), 526 states have internal predecessors, (533), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:41:00,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 538 transitions. [2022-01-31 17:41:00,756 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 538 transitions. Word has length 521 [2022-01-31 17:41:00,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:41:00,756 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 538 transitions. [2022-01-31 17:41:00,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.2298850574712643) internal successors, (107), 86 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 17:41:00,756 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 538 transitions. [2022-01-31 17:41:00,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-01-31 17:41:00,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:41:00,759 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:41:00,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 17:41:00,759 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:41:00,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:41:00,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1358536605, now seen corresponding path program 84 times [2022-01-31 17:41:00,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:41:00,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366745375] [2022-01-31 17:41:00,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:41:00,760 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:41:00,760 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:41:00,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:41:00,795 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:41:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:03,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:41:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:41:03,053 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:41:03,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366745375] [2022-01-31 17:41:03,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [366745375] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:41:03,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:41:03,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 17:41:03,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435250782] [2022-01-31 17:41:03,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:41:03,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 17:41:03,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:41:03,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 17:41:03,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 17:41:03,056 INFO L87 Difference]: Start difference. First operand 532 states and 538 transitions. Second operand has 88 states, 88 states have (on average 1.2272727272727273) internal successors, (108), 87 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:06,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:41:06,817 INFO L93 Difference]: Finished difference Result 979 states and 996 transitions. [2022-01-31 17:41:06,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 17:41:06,817 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.2272727272727273) internal successors, (108), 87 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 527 [2022-01-31 17:41:06,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:41:06,819 INFO L225 Difference]: With dead ends: 979 [2022-01-31 17:41:06,819 INFO L226 Difference]: Without dead ends: 538 [2022-01-31 17:41:06,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 17:41:06,820 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 2054 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 2674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2054 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:41:06,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 59 Invalid, 2674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2054 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:41:06,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-01-31 17:41:06,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2022-01-31 17:41:06,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 532 states have (on average 1.013157894736842) internal successors, (539), 532 states have internal predecessors, (539), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:41:06,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 544 transitions. [2022-01-31 17:41:06,830 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 544 transitions. Word has length 527 [2022-01-31 17:41:06,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:41:06,830 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 544 transitions. [2022-01-31 17:41:06,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.2272727272727273) internal successors, (108), 87 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:06,831 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 544 transitions. [2022-01-31 17:41:06,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2022-01-31 17:41:06,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:41:06,833 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:41:06,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 17:41:06,833 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:41:06,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:41:06,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1133895936, now seen corresponding path program 85 times [2022-01-31 17:41:06,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:41:06,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111263655] [2022-01-31 17:41:06,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:41:06,834 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:41:06,835 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:41:06,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:41:06,855 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:41:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:09,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:41:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:41:09,154 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:41:09,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111263655] [2022-01-31 17:41:09,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [111263655] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:41:09,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:41:09,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 17:41:09,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913796563] [2022-01-31 17:41:09,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:41:09,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 17:41:09,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:41:09,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 17:41:09,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:41:09,157 INFO L87 Difference]: Start difference. First operand 538 states and 544 transitions. Second operand has 89 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 88 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 17:41:12,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:41:12,974 INFO L93 Difference]: Finished difference Result 990 states and 1007 transitions. [2022-01-31 17:41:12,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 17:41:12,975 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 88 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 533 [2022-01-31 17:41:12,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:41:12,976 INFO L225 Difference]: With dead ends: 990 [2022-01-31 17:41:12,976 INFO L226 Difference]: Without dead ends: 544 [2022-01-31 17:41:12,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 17:41:12,978 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 1999 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 2659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1999 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:41:12,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 69 Invalid, 2659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1999 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:41:12,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-01-31 17:41:12,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2022-01-31 17:41:12,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 538 states have (on average 1.013011152416357) internal successors, (545), 538 states have internal predecessors, (545), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:41:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 550 transitions. [2022-01-31 17:41:12,987 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 550 transitions. Word has length 533 [2022-01-31 17:41:12,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:41:12,988 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 550 transitions. [2022-01-31 17:41:12,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 88 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 17:41:12,988 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 550 transitions. [2022-01-31 17:41:12,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2022-01-31 17:41:12,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:41:12,990 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:41:12,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 17:41:12,990 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:41:12,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:41:12,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1177679357, now seen corresponding path program 86 times [2022-01-31 17:41:12,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:41:12,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811162456] [2022-01-31 17:41:12,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:41:12,992 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:41:12,992 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:41:12,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:41:13,017 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:41:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:15,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:41:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:41:15,373 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:41:15,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811162456] [2022-01-31 17:41:15,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811162456] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:41:15,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:41:15,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 17:41:15,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675706672] [2022-01-31 17:41:15,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:41:15,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 17:41:15,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:41:15,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 17:41:15,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 17:41:15,375 INFO L87 Difference]: Start difference. First operand 544 states and 550 transitions. Second operand has 90 states, 90 states have (on average 1.2222222222222223) internal successors, (110), 89 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:19,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:41:19,461 INFO L93 Difference]: Finished difference Result 1001 states and 1018 transitions. [2022-01-31 17:41:19,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 17:41:19,461 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.2222222222222223) internal successors, (110), 89 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 539 [2022-01-31 17:41:19,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:41:19,463 INFO L225 Difference]: With dead ends: 1001 [2022-01-31 17:41:19,463 INFO L226 Difference]: Without dead ends: 550 [2022-01-31 17:41:19,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 17:41:19,464 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 2687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 3302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2687 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:41:19,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 3302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2687 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:41:19,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-01-31 17:41:19,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2022-01-31 17:41:19,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 544 states have (on average 1.0128676470588236) internal successors, (551), 544 states have internal predecessors, (551), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:41:19,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 556 transitions. [2022-01-31 17:41:19,474 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 556 transitions. Word has length 539 [2022-01-31 17:41:19,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:41:19,474 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 556 transitions. [2022-01-31 17:41:19,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.2222222222222223) internal successors, (110), 89 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:19,474 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 556 transitions. [2022-01-31 17:41:19,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2022-01-31 17:41:19,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:41:19,477 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:41:19,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 17:41:19,477 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:41:19,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:41:19,477 INFO L85 PathProgramCache]: Analyzing trace with hash -279349536, now seen corresponding path program 87 times [2022-01-31 17:41:19,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:41:19,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355331646] [2022-01-31 17:41:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:41:19,478 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:41:19,478 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:41:19,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:41:19,501 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:41:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:21,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:41:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:41:21,896 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:41:21,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355331646] [2022-01-31 17:41:21,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [355331646] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:41:21,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:41:21,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 17:41:21,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146885551] [2022-01-31 17:41:21,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:41:21,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 17:41:21,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:41:21,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 17:41:21,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:41:21,900 INFO L87 Difference]: Start difference. First operand 550 states and 556 transitions. Second operand has 91 states, 91 states have (on average 1.2197802197802199) internal successors, (111), 90 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 17:41:25,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:41:25,953 INFO L93 Difference]: Finished difference Result 1012 states and 1029 transitions. [2022-01-31 17:41:25,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 17:41:25,953 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.2197802197802199) internal successors, (111), 90 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 545 [2022-01-31 17:41:25,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:41:25,954 INFO L225 Difference]: With dead ends: 1012 [2022-01-31 17:41:25,954 INFO L226 Difference]: Without dead ends: 556 [2022-01-31 17:41:25,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 17:41:25,956 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 2293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 2914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2293 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:41:25,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 2914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2293 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:41:25,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-01-31 17:41:25,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 556. [2022-01-31 17:41:25,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 550 states have (on average 1.0127272727272727) internal successors, (557), 550 states have internal predecessors, (557), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:41:25,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 562 transitions. [2022-01-31 17:41:25,966 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 562 transitions. Word has length 545 [2022-01-31 17:41:25,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:41:25,966 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 562 transitions. [2022-01-31 17:41:25,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.2197802197802199) internal successors, (111), 90 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 17:41:25,966 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 562 transitions. [2022-01-31 17:41:25,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2022-01-31 17:41:25,968 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:41:25,968 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:41:25,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 17:41:25,968 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:41:25,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:41:25,969 INFO L85 PathProgramCache]: Analyzing trace with hash 393849763, now seen corresponding path program 88 times [2022-01-31 17:41:25,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:41:25,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460017172] [2022-01-31 17:41:25,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:41:25,970 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:41:25,970 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:41:25,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:41:25,991 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:41:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:28,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:41:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:28,462 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 17:41:28,462 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:41:28,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460017172] [2022-01-31 17:41:28,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [460017172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:41:28,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:41:28,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 17:41:28,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619263411] [2022-01-31 17:41:28,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:41:28,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 17:41:28,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:41:28,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 17:41:28,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 17:41:28,464 INFO L87 Difference]: Start difference. First operand 556 states and 562 transitions. Second operand has 92 states, 92 states have (on average 1.2173913043478262) internal successors, (112), 91 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:32,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:41:32,586 INFO L93 Difference]: Finished difference Result 1023 states and 1040 transitions. [2022-01-31 17:41:32,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 17:41:32,586 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.2173913043478262) internal successors, (112), 91 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 551 [2022-01-31 17:41:32,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:41:32,588 INFO L225 Difference]: With dead ends: 1023 [2022-01-31 17:41:32,588 INFO L226 Difference]: Without dead ends: 562 [2022-01-31 17:41:32,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 17:41:32,590 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 2195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 2873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2195 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:41:32,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 69 Invalid, 2873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2195 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:41:32,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-01-31 17:41:32,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2022-01-31 17:41:32,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 556 states have (on average 1.0125899280575539) internal successors, (563), 556 states have internal predecessors, (563), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:41:32,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 568 transitions. [2022-01-31 17:41:32,600 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 568 transitions. Word has length 551 [2022-01-31 17:41:32,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:41:32,600 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 568 transitions. [2022-01-31 17:41:32,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.2173913043478262) internal successors, (112), 91 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:32,600 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 568 transitions. [2022-01-31 17:41:32,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2022-01-31 17:41:32,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:41:32,603 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:41:32,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 17:41:32,603 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:41:32,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:41:32,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1285253440, now seen corresponding path program 89 times [2022-01-31 17:41:32,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:41:32,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144234445] [2022-01-31 17:41:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:41:32,604 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:41:32,604 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:41:32,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:41:32,627 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:41:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:35,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:41:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:35,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:41:35,181 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:41:35,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144234445] [2022-01-31 17:41:35,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2144234445] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:41:35,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:41:35,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 17:41:35,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106155167] [2022-01-31 17:41:35,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:41:35,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 17:41:35,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:41:35,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 17:41:35,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:41:35,184 INFO L87 Difference]: Start difference. First operand 562 states and 568 transitions. Second operand has 93 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 92 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 17:41:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:41:39,490 INFO L93 Difference]: Finished difference Result 1034 states and 1051 transitions. [2022-01-31 17:41:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 17:41:39,490 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 92 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 557 [2022-01-31 17:41:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:41:39,491 INFO L225 Difference]: With dead ends: 1034 [2022-01-31 17:41:39,491 INFO L226 Difference]: Without dead ends: 568 [2022-01-31 17:41:39,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 17:41:39,493 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 2492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 3108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2492 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:41:39,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 3108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2492 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:41:39,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-01-31 17:41:39,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2022-01-31 17:41:39,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 562 states have (on average 1.0124555160142348) internal successors, (569), 562 states have internal predecessors, (569), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:41:39,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 574 transitions. [2022-01-31 17:41:39,503 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 574 transitions. Word has length 557 [2022-01-31 17:41:39,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:41:39,503 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 574 transitions. [2022-01-31 17:41:39,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 92 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 17:41:39,503 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 574 transitions. [2022-01-31 17:41:39,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2022-01-31 17:41:39,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:41:39,505 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:41:39,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 17:41:39,506 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:41:39,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:41:39,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1210533187, now seen corresponding path program 90 times [2022-01-31 17:41:39,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:41:39,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649488454] [2022-01-31 17:41:39,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:41:39,507 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:41:39,507 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:41:39,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:41:39,530 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:41:39,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:42,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:41:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:41:42,119 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:41:42,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649488454] [2022-01-31 17:41:42,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1649488454] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:41:42,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:41:42,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 17:41:42,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772531233] [2022-01-31 17:41:42,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:41:42,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 17:41:42,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:41:42,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 17:41:42,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 17:41:42,120 INFO L87 Difference]: Start difference. First operand 568 states and 574 transitions. Second operand has 94 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 93 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:46,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:41:46,474 INFO L93 Difference]: Finished difference Result 1045 states and 1062 transitions. [2022-01-31 17:41:46,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 17:41:46,474 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 93 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 563 [2022-01-31 17:41:46,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:41:46,476 INFO L225 Difference]: With dead ends: 1045 [2022-01-31 17:41:46,476 INFO L226 Difference]: Without dead ends: 574 [2022-01-31 17:41:46,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 17:41:46,477 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 2346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2346 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:41:46,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2346 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:41:46,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-01-31 17:41:46,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2022-01-31 17:41:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 568 states have (on average 1.0123239436619718) internal successors, (575), 568 states have internal predecessors, (575), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:41:46,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 580 transitions. [2022-01-31 17:41:46,487 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 580 transitions. Word has length 563 [2022-01-31 17:41:46,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:41:46,488 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 580 transitions. [2022-01-31 17:41:46,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 93 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:41:46,488 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 580 transitions. [2022-01-31 17:41:46,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2022-01-31 17:41:46,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:41:46,490 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:41:46,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 17:41:46,490 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:41:46,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:41:46,491 INFO L85 PathProgramCache]: Analyzing trace with hash -733118816, now seen corresponding path program 91 times [2022-01-31 17:41:46,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:41:46,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707519529] [2022-01-31 17:41:46,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:41:46,492 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:41:46,492 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:41:46,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:41:46,518 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:41:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:49,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:41:49,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:41:49,149 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:41:49,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707519529] [2022-01-31 17:41:49,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1707519529] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:41:49,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:41:49,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 17:41:49,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570422938] [2022-01-31 17:41:49,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:41:49,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 17:41:49,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:41:49,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 17:41:49,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:41:49,151 INFO L87 Difference]: Start difference. First operand 574 states and 580 transitions. Second operand has 95 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 94 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 17:41:53,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:41:53,701 INFO L93 Difference]: Finished difference Result 1056 states and 1073 transitions. [2022-01-31 17:41:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 17:41:53,701 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 94 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 569 [2022-01-31 17:41:53,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:41:53,702 INFO L225 Difference]: With dead ends: 1056 [2022-01-31 17:41:53,702 INFO L226 Difference]: Without dead ends: 580 [2022-01-31 17:41:53,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 17:41:53,704 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 2426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 3071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2426 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:41:53,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 3071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2426 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:41:53,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-01-31 17:41:53,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2022-01-31 17:41:53,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 574 states have (on average 1.0121951219512195) internal successors, (581), 574 states have internal predecessors, (581), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:41:53,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 586 transitions. [2022-01-31 17:41:53,715 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 586 transitions. Word has length 569 [2022-01-31 17:41:53,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:41:53,715 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 586 transitions. [2022-01-31 17:41:53,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 94 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 17:41:53,715 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 586 transitions. [2022-01-31 17:41:53,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2022-01-31 17:41:53,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:41:53,718 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:41:53,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 17:41:53,718 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:41:53,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:41:53,718 INFO L85 PathProgramCache]: Analyzing trace with hash 762631907, now seen corresponding path program 92 times [2022-01-31 17:41:53,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:41:53,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956790364] [2022-01-31 17:41:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:41:53,719 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:41:53,719 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:41:53,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:41:53,747 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:41:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:56,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:41:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:41:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:41:56,419 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:41:56,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956790364] [2022-01-31 17:41:56,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [956790364] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:41:56,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:41:56,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 17:41:56,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654255044] [2022-01-31 17:41:56,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:41:56,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 17:41:56,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:41:56,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 17:41:56,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 17:41:56,422 INFO L87 Difference]: Start difference. First operand 580 states and 586 transitions. Second operand has 96 states, 96 states have (on average 1.2083333333333333) internal successors, (116), 95 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:42:01,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:42:01,113 INFO L93 Difference]: Finished difference Result 1067 states and 1084 transitions. [2022-01-31 17:42:01,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 17:42:01,113 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.2083333333333333) internal successors, (116), 95 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 575 [2022-01-31 17:42:01,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:42:01,115 INFO L225 Difference]: With dead ends: 1067 [2022-01-31 17:42:01,115 INFO L226 Difference]: Without dead ends: 586 [2022-01-31 17:42:01,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 17:42:01,117 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 2831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 3465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2831 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:42:01,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 3465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2831 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:42:01,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-01-31 17:42:01,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2022-01-31 17:42:01,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 580 states have (on average 1.0120689655172415) internal successors, (587), 580 states have internal predecessors, (587), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:42:01,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 592 transitions. [2022-01-31 17:42:01,127 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 592 transitions. Word has length 575 [2022-01-31 17:42:01,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:42:01,127 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 592 transitions. [2022-01-31 17:42:01,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.2083333333333333) internal successors, (116), 95 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:42:01,127 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 592 transitions. [2022-01-31 17:42:01,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2022-01-31 17:42:01,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:42:01,130 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:42:01,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 17:42:01,130 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:42:01,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:42:01,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1135202688, now seen corresponding path program 93 times [2022-01-31 17:42:01,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:42:01,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95127605] [2022-01-31 17:42:01,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:42:01,131 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:42:01,132 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:42:01,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:42:01,175 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:42:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:03,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:42:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:42:03,888 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:42:03,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95127605] [2022-01-31 17:42:03,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [95127605] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:42:03,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:42:03,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 17:42:03,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228264639] [2022-01-31 17:42:03,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:42:03,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 17:42:03,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:42:03,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 17:42:03,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:42:03,891 INFO L87 Difference]: Start difference. First operand 586 states and 592 transitions. Second operand has 97 states, 97 states have (on average 1.2061855670103092) internal successors, (117), 96 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 17:42:08,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:42:08,616 INFO L93 Difference]: Finished difference Result 1078 states and 1095 transitions. [2022-01-31 17:42:08,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 17:42:08,617 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.2061855670103092) internal successors, (117), 96 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 581 [2022-01-31 17:42:08,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:42:08,618 INFO L225 Difference]: With dead ends: 1078 [2022-01-31 17:42:08,618 INFO L226 Difference]: Without dead ends: 592 [2022-01-31 17:42:08,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 17:42:08,620 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 2758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 3347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2758 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:42:08,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 34 Invalid, 3347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2758 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:42:08,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-01-31 17:42:08,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2022-01-31 17:42:08,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 586 states have (on average 1.0119453924914676) internal successors, (593), 586 states have internal predecessors, (593), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:42:08,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 598 transitions. [2022-01-31 17:42:08,630 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 598 transitions. Word has length 581 [2022-01-31 17:42:08,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:42:08,630 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 598 transitions. [2022-01-31 17:42:08,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.2061855670103092) internal successors, (117), 96 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 17:42:08,630 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 598 transitions. [2022-01-31 17:42:08,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2022-01-31 17:42:08,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:42:08,633 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:42:08,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 17:42:08,633 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:42:08,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:42:08,633 INFO L85 PathProgramCache]: Analyzing trace with hash -360685437, now seen corresponding path program 94 times [2022-01-31 17:42:08,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:42:08,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393836928] [2022-01-31 17:42:08,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:42:08,634 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:42:08,634 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:42:08,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:42:08,664 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:42:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:11,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:42:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:42:11,459 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:42:11,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393836928] [2022-01-31 17:42:11,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [393836928] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:42:11,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:42:11,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 17:42:11,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900242436] [2022-01-31 17:42:11,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:42:11,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 17:42:11,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:42:11,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 17:42:11,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 17:42:11,461 INFO L87 Difference]: Start difference. First operand 592 states and 598 transitions. Second operand has 98 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 97 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:42:16,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:42:16,215 INFO L93 Difference]: Finished difference Result 1089 states and 1106 transitions. [2022-01-31 17:42:16,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 17:42:16,216 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 97 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 587 [2022-01-31 17:42:16,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:42:16,217 INFO L225 Difference]: With dead ends: 1089 [2022-01-31 17:42:16,217 INFO L226 Difference]: Without dead ends: 598 [2022-01-31 17:42:16,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 17:42:16,219 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 2652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 3281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2652 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:42:16,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 3281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2652 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:42:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-01-31 17:42:16,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2022-01-31 17:42:16,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 592 states have (on average 1.0118243243243243) internal successors, (599), 592 states have internal predecessors, (599), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:42:16,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 604 transitions. [2022-01-31 17:42:16,233 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 604 transitions. Word has length 587 [2022-01-31 17:42:16,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:42:16,233 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 604 transitions. [2022-01-31 17:42:16,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 97 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:42:16,233 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 604 transitions. [2022-01-31 17:42:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2022-01-31 17:42:16,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:42:16,236 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:42:16,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 17:42:16,236 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:42:16,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:42:16,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1807702432, now seen corresponding path program 95 times [2022-01-31 17:42:16,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:42:16,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083505181] [2022-01-31 17:42:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:42:16,237 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:42:16,237 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:42:16,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:42:16,266 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:42:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:19,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:42:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:19,127 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 17:42:19,127 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:42:19,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083505181] [2022-01-31 17:42:19,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1083505181] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:42:19,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:42:19,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 17:42:19,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520550039] [2022-01-31 17:42:19,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:42:19,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 17:42:19,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:42:19,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 17:42:19,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:42:19,129 INFO L87 Difference]: Start difference. First operand 598 states and 604 transitions. Second operand has 99 states, 99 states have (on average 1.202020202020202) internal successors, (119), 98 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 17:42:23,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:42:23,939 INFO L93 Difference]: Finished difference Result 1100 states and 1117 transitions. [2022-01-31 17:42:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 17:42:23,939 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.202020202020202) internal successors, (119), 98 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 593 [2022-01-31 17:42:23,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:42:23,941 INFO L225 Difference]: With dead ends: 1100 [2022-01-31 17:42:23,941 INFO L226 Difference]: Without dead ends: 604 [2022-01-31 17:42:23,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 17:42:23,944 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 2329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 2998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2329 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:42:23,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 2998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2329 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:42:23,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-01-31 17:42:23,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2022-01-31 17:42:23,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 598 states have (on average 1.0117056856187292) internal successors, (605), 598 states have internal predecessors, (605), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:42:23,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 610 transitions. [2022-01-31 17:42:23,954 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 610 transitions. Word has length 593 [2022-01-31 17:42:23,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:42:23,954 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 610 transitions. [2022-01-31 17:42:23,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.202020202020202) internal successors, (119), 98 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 17:42:23,955 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 610 transitions. [2022-01-31 17:42:23,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 600 [2022-01-31 17:42:23,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:42:23,957 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:42:23,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 17:42:23,958 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:42:23,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:42:23,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1008213469, now seen corresponding path program 96 times [2022-01-31 17:42:23,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:42:23,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801388217] [2022-01-31 17:42:23,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:42:23,959 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:42:23,959 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:42:23,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:42:23,988 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:42:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:26,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:42:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:42:26,857 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:42:26,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801388217] [2022-01-31 17:42:26,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1801388217] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:42:26,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:42:26,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 17:42:26,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083197104] [2022-01-31 17:42:26,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:42:26,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 17:42:26,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:42:26,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 17:42:26,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 17:42:26,860 INFO L87 Difference]: Start difference. First operand 604 states and 610 transitions. Second operand has 100 states, 100 states have (on average 1.2) internal successors, (120), 99 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:42:32,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:42:32,014 INFO L93 Difference]: Finished difference Result 1111 states and 1128 transitions. [2022-01-31 17:42:32,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 17:42:32,014 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.2) internal successors, (120), 99 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 599 [2022-01-31 17:42:32,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:42:32,016 INFO L225 Difference]: With dead ends: 1111 [2022-01-31 17:42:32,016 INFO L226 Difference]: Without dead ends: 610 [2022-01-31 17:42:32,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 17:42:32,018 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 3196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 3854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3196 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:42:32,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 3854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3196 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:42:32,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-01-31 17:42:32,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2022-01-31 17:42:32,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 604 states have (on average 1.0115894039735098) internal successors, (611), 604 states have internal predecessors, (611), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:42:32,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 616 transitions. [2022-01-31 17:42:32,028 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 616 transitions. Word has length 599 [2022-01-31 17:42:32,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:42:32,028 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 616 transitions. [2022-01-31 17:42:32,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.2) internal successors, (120), 99 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:42:32,029 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 616 transitions. [2022-01-31 17:42:32,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2022-01-31 17:42:32,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:42:32,031 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:42:32,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 17:42:32,032 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:42:32,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:42:32,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1666115136, now seen corresponding path program 97 times [2022-01-31 17:42:32,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:42:32,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188825160] [2022-01-31 17:42:32,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:42:32,033 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:42:32,033 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:42:32,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:42:32,065 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:42:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:35,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:42:35,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:42:35,040 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:42:35,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188825160] [2022-01-31 17:42:35,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [188825160] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:42:35,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:42:35,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 17:42:35,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493860342] [2022-01-31 17:42:35,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:42:35,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 17:42:35,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:42:35,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 17:42:35,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:42:35,043 INFO L87 Difference]: Start difference. First operand 610 states and 616 transitions. Second operand has 101 states, 101 states have (on average 1.198019801980198) internal successors, (121), 100 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 17:42:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:42:40,105 INFO L93 Difference]: Finished difference Result 1122 states and 1139 transitions. [2022-01-31 17:42:40,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 17:42:40,105 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.198019801980198) internal successors, (121), 100 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 605 [2022-01-31 17:42:40,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:42:40,106 INFO L225 Difference]: With dead ends: 1122 [2022-01-31 17:42:40,106 INFO L226 Difference]: Without dead ends: 616 [2022-01-31 17:42:40,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 17:42:40,108 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 2532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 3247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2532 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:42:40,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 3247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2532 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:42:40,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-31 17:42:40,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2022-01-31 17:42:40,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 610 states have (on average 1.0114754098360657) internal successors, (617), 610 states have internal predecessors, (617), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:42:40,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 622 transitions. [2022-01-31 17:42:40,119 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 622 transitions. Word has length 605 [2022-01-31 17:42:40,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:42:40,119 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 622 transitions. [2022-01-31 17:42:40,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.198019801980198) internal successors, (121), 100 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 17:42:40,119 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 622 transitions. [2022-01-31 17:42:40,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2022-01-31 17:42:40,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:42:40,122 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:42:40,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 17:42:40,122 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:42:40,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:42:40,122 INFO L85 PathProgramCache]: Analyzing trace with hash -3580989, now seen corresponding path program 98 times [2022-01-31 17:42:40,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:42:40,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216388277] [2022-01-31 17:42:40,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:42:40,123 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:42:40,123 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:42:40,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:42:40,152 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:42:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:43,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:42:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:42:43,153 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:42:43,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216388277] [2022-01-31 17:42:43,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1216388277] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:42:43,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:42:43,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 17:42:43,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364998212] [2022-01-31 17:42:43,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:42:43,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 17:42:43,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:42:43,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 17:42:43,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 17:42:43,155 INFO L87 Difference]: Start difference. First operand 616 states and 622 transitions. Second operand has 102 states, 102 states have (on average 1.196078431372549) internal successors, (122), 101 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:42:48,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:42:48,273 INFO L93 Difference]: Finished difference Result 1133 states and 1150 transitions. [2022-01-31 17:42:48,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 17:42:48,273 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.196078431372549) internal successors, (122), 101 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 611 [2022-01-31 17:42:48,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:42:48,274 INFO L225 Difference]: With dead ends: 1133 [2022-01-31 17:42:48,274 INFO L226 Difference]: Without dead ends: 622 [2022-01-31 17:42:48,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 17:42:48,276 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 2183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 2955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2183 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:42:48,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 79 Invalid, 2955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2183 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:42:48,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-01-31 17:42:48,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2022-01-31 17:42:48,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 616 states have (on average 1.0113636363636365) internal successors, (623), 616 states have internal predecessors, (623), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:42:48,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 628 transitions. [2022-01-31 17:42:48,303 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 628 transitions. Word has length 611 [2022-01-31 17:42:48,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:42:48,303 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 628 transitions. [2022-01-31 17:42:48,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.196078431372549) internal successors, (122), 101 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:42:48,304 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 628 transitions. [2022-01-31 17:42:48,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2022-01-31 17:42:48,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:42:48,306 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:42:48,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 17:42:48,307 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:42:48,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:42:48,307 INFO L85 PathProgramCache]: Analyzing trace with hash 792915488, now seen corresponding path program 99 times [2022-01-31 17:42:48,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:42:48,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064214112] [2022-01-31 17:42:48,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:42:48,308 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:42:48,308 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:42:48,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:42:48,338 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:42:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:51,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:42:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:51,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:42:51,376 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:42:51,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064214112] [2022-01-31 17:42:51,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2064214112] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:42:51,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:42:51,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 17:42:51,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372141818] [2022-01-31 17:42:51,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:42:51,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 17:42:51,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:42:51,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 17:42:51,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:42:51,380 INFO L87 Difference]: Start difference. First operand 622 states and 628 transitions. Second operand has 103 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 102 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 17:42:56,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:42:56,643 INFO L93 Difference]: Finished difference Result 1144 states and 1161 transitions. [2022-01-31 17:42:56,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 17:42:56,643 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 102 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 617 [2022-01-31 17:42:56,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:42:56,644 INFO L225 Difference]: With dead ends: 1144 [2022-01-31 17:42:56,644 INFO L226 Difference]: Without dead ends: 628 [2022-01-31 17:42:56,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 17:42:56,646 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 2487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 3231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2487 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:42:56,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 69 Invalid, 3231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2487 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:42:56,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-01-31 17:42:56,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2022-01-31 17:42:56,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 622 states have (on average 1.0112540192926045) internal successors, (629), 622 states have internal predecessors, (629), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:42:56,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 634 transitions. [2022-01-31 17:42:56,656 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 634 transitions. Word has length 617 [2022-01-31 17:42:56,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:42:56,657 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 634 transitions. [2022-01-31 17:42:56,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 102 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 17:42:56,657 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 634 transitions. [2022-01-31 17:42:56,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2022-01-31 17:42:56,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:42:56,660 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:42:56,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 17:42:56,660 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:42:56,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:42:56,660 INFO L85 PathProgramCache]: Analyzing trace with hash -977089181, now seen corresponding path program 100 times [2022-01-31 17:42:56,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:42:56,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805420714] [2022-01-31 17:42:56,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:42:56,661 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:42:56,661 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:42:56,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:42:56,691 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:42:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:59,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:42:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:42:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:42:59,831 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:42:59,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805420714] [2022-01-31 17:42:59,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [805420714] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:42:59,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:42:59,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 17:42:59,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700569645] [2022-01-31 17:42:59,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:42:59,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 17:42:59,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:42:59,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 17:42:59,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 17:42:59,834 INFO L87 Difference]: Start difference. First operand 628 states and 634 transitions. Second operand has 104 states, 104 states have (on average 1.1923076923076923) internal successors, (124), 103 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:43:05,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:43:05,289 INFO L93 Difference]: Finished difference Result 1155 states and 1172 transitions. [2022-01-31 17:43:05,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 17:43:05,289 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.1923076923076923) internal successors, (124), 103 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 623 [2022-01-31 17:43:05,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:43:05,290 INFO L225 Difference]: With dead ends: 1155 [2022-01-31 17:43:05,290 INFO L226 Difference]: Without dead ends: 634 [2022-01-31 17:43:05,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 17:43:05,292 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 2516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 3215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2516 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:43:05,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 3215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2516 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:43:05,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-01-31 17:43:05,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 634. [2022-01-31 17:43:05,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 628 states have (on average 1.0111464968152866) internal successors, (635), 628 states have internal predecessors, (635), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:43:05,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 640 transitions. [2022-01-31 17:43:05,303 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 640 transitions. Word has length 623 [2022-01-31 17:43:05,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:43:05,303 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 640 transitions. [2022-01-31 17:43:05,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.1923076923076923) internal successors, (124), 103 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:43:05,303 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 640 transitions. [2022-01-31 17:43:05,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2022-01-31 17:43:05,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:43:05,306 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:43:05,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 17:43:05,306 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:43:05,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:43:05,307 INFO L85 PathProgramCache]: Analyzing trace with hash 475971072, now seen corresponding path program 101 times [2022-01-31 17:43:05,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:43:05,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998136495] [2022-01-31 17:43:05,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:43:05,308 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:43:05,308 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:43:05,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:43:05,352 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:43:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:08,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:43:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:08,501 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 17:43:08,502 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:43:08,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998136495] [2022-01-31 17:43:08,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1998136495] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:43:08,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:43:08,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 17:43:08,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607533648] [2022-01-31 17:43:08,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:43:08,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 17:43:08,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:43:08,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 17:43:08,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:43:08,504 INFO L87 Difference]: Start difference. First operand 634 states and 640 transitions. Second operand has 105 states, 105 states have (on average 1.1904761904761905) internal successors, (125), 104 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 17:43:14,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:43:14,053 INFO L93 Difference]: Finished difference Result 1166 states and 1183 transitions. [2022-01-31 17:43:14,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 17:43:14,054 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.1904761904761905) internal successors, (125), 104 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 629 [2022-01-31 17:43:14,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:43:14,055 INFO L225 Difference]: With dead ends: 1166 [2022-01-31 17:43:14,055 INFO L226 Difference]: Without dead ends: 640 [2022-01-31 17:43:14,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 17:43:14,057 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 2509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2509 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:43:14,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 59 Invalid, 3231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2509 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:43:14,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-01-31 17:43:14,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 640. [2022-01-31 17:43:14,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 634 states have (on average 1.0110410094637223) internal successors, (641), 634 states have internal predecessors, (641), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:43:14,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 646 transitions. [2022-01-31 17:43:14,067 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 646 transitions. Word has length 629 [2022-01-31 17:43:14,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:43:14,067 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 646 transitions. [2022-01-31 17:43:14,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.1904761904761905) internal successors, (125), 104 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 17:43:14,067 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 646 transitions. [2022-01-31 17:43:14,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 636 [2022-01-31 17:43:14,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:43:14,070 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:43:14,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 17:43:14,070 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:43:14,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:43:14,071 INFO L85 PathProgramCache]: Analyzing trace with hash -17680637, now seen corresponding path program 102 times [2022-01-31 17:43:14,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:43:14,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778659007] [2022-01-31 17:43:14,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:43:14,072 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:43:14,072 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:43:14,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:43:14,102 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:43:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:17,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:43:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:43:17,345 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:43:17,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778659007] [2022-01-31 17:43:17,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [778659007] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:43:17,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:43:17,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 17:43:17,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168364011] [2022-01-31 17:43:17,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:43:17,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 17:43:17,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:43:17,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 17:43:17,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 17:43:17,347 INFO L87 Difference]: Start difference. First operand 640 states and 646 transitions. Second operand has 106 states, 106 states have (on average 1.1886792452830188) internal successors, (126), 105 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:43:22,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:43:22,963 INFO L93 Difference]: Finished difference Result 1177 states and 1194 transitions. [2022-01-31 17:43:22,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 17:43:22,964 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.1886792452830188) internal successors, (126), 105 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 635 [2022-01-31 17:43:22,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:43:22,965 INFO L225 Difference]: With dead ends: 1177 [2022-01-31 17:43:22,965 INFO L226 Difference]: Without dead ends: 646 [2022-01-31 17:43:22,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 17:43:22,967 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 2386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 3165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2386 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:43:22,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 74 Invalid, 3165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2386 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:43:22,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-01-31 17:43:22,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 646. [2022-01-31 17:43:22,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 640 states have (on average 1.0109375) internal successors, (647), 640 states have internal predecessors, (647), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:43:22,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 652 transitions. [2022-01-31 17:43:22,978 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 652 transitions. Word has length 635 [2022-01-31 17:43:22,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:43:22,978 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 652 transitions. [2022-01-31 17:43:22,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.1886792452830188) internal successors, (126), 105 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:43:22,978 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 652 transitions. [2022-01-31 17:43:22,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2022-01-31 17:43:22,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:43:22,981 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:43:22,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 17:43:22,981 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:43:22,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:43:22,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1922804256, now seen corresponding path program 103 times [2022-01-31 17:43:22,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:43:22,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427538444] [2022-01-31 17:43:22,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:43:22,982 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:43:22,982 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:43:22,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:43:23,016 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:43:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:26,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:43:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:43:26,413 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:43:26,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427538444] [2022-01-31 17:43:26,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1427538444] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:43:26,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:43:26,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 17:43:26,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677646768] [2022-01-31 17:43:26,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:43:26,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 17:43:26,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:43:26,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 17:43:26,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:43:26,416 INFO L87 Difference]: Start difference. First operand 646 states and 652 transitions. Second operand has 107 states, 107 states have (on average 1.1869158878504673) internal successors, (127), 106 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 17:43:32,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:43:32,245 INFO L93 Difference]: Finished difference Result 1188 states and 1205 transitions. [2022-01-31 17:43:32,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 17:43:32,245 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.1869158878504673) internal successors, (127), 106 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 641 [2022-01-31 17:43:32,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:43:32,246 INFO L225 Difference]: With dead ends: 1188 [2022-01-31 17:43:32,246 INFO L226 Difference]: Without dead ends: 652 [2022-01-31 17:43:32,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 17:43:32,248 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 2594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 3345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2594 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:43:32,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 3345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2594 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:43:32,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-01-31 17:43:32,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 652. [2022-01-31 17:43:32,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 646 states have (on average 1.0108359133126934) internal successors, (653), 646 states have internal predecessors, (653), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:43:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 658 transitions. [2022-01-31 17:43:32,259 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 658 transitions. Word has length 641 [2022-01-31 17:43:32,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:43:32,259 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 658 transitions. [2022-01-31 17:43:32,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.1869158878504673) internal successors, (127), 106 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 17:43:32,259 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 658 transitions. [2022-01-31 17:43:32,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2022-01-31 17:43:32,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:43:32,262 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:43:32,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 17:43:32,262 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:43:32,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:43:32,263 INFO L85 PathProgramCache]: Analyzing trace with hash 905287843, now seen corresponding path program 104 times [2022-01-31 17:43:32,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:43:32,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192803833] [2022-01-31 17:43:32,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:43:32,264 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:43:32,264 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:43:32,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:43:32,296 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:43:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:35,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:43:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:35,680 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 17:43:35,680 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:43:35,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192803833] [2022-01-31 17:43:35,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [192803833] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:43:35,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:43:35,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 17:43:35,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664014422] [2022-01-31 17:43:35,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:43:35,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 17:43:35,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:43:35,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 17:43:35,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 17:43:35,682 INFO L87 Difference]: Start difference. First operand 652 states and 658 transitions. Second operand has 108 states, 108 states have (on average 1.1851851851851851) internal successors, (128), 107 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:43:41,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:43:41,690 INFO L93 Difference]: Finished difference Result 1199 states and 1216 transitions. [2022-01-31 17:43:41,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 17:43:41,690 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.1851851851851851) internal successors, (128), 107 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 647 [2022-01-31 17:43:41,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:43:41,691 INFO L225 Difference]: With dead ends: 1199 [2022-01-31 17:43:41,691 INFO L226 Difference]: Without dead ends: 658 [2022-01-31 17:43:41,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 17:43:41,693 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 3153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 3859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3153 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:43:41,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 3859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3153 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:43:41,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-01-31 17:43:41,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 658. [2022-01-31 17:43:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 652 states have (on average 1.0107361963190185) internal successors, (659), 652 states have internal predecessors, (659), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:43:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 664 transitions. [2022-01-31 17:43:41,704 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 664 transitions. Word has length 647 [2022-01-31 17:43:41,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:43:41,704 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 664 transitions. [2022-01-31 17:43:41,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.1851851851851851) internal successors, (128), 107 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:43:41,704 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 664 transitions. [2022-01-31 17:43:41,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 654 [2022-01-31 17:43:41,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:43:41,707 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:43:41,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 17:43:41,707 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:43:41,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:43:41,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1133884864, now seen corresponding path program 105 times [2022-01-31 17:43:41,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:43:41,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027779938] [2022-01-31 17:43:41,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:43:41,708 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:43:41,709 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:43:41,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:43:41,740 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:43:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:45,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:43:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:43:45,161 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:43:45,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027779938] [2022-01-31 17:43:45,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1027779938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:43:45,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:43:45,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 17:43:45,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831225314] [2022-01-31 17:43:45,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:43:45,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 17:43:45,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:43:45,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 17:43:45,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:43:45,164 INFO L87 Difference]: Start difference. First operand 658 states and 664 transitions. Second operand has 109 states, 109 states have (on average 1.18348623853211) internal successors, (129), 108 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 17:43:51,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:43:51,281 INFO L93 Difference]: Finished difference Result 1210 states and 1227 transitions. [2022-01-31 17:43:51,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 17:43:51,281 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.18348623853211) internal successors, (129), 108 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 653 [2022-01-31 17:43:51,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:43:51,282 INFO L225 Difference]: With dead ends: 1210 [2022-01-31 17:43:51,282 INFO L226 Difference]: Without dead ends: 664 [2022-01-31 17:43:51,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 17:43:51,284 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 3213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 3891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3213 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:43:51,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 3891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3213 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:43:51,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-01-31 17:43:51,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 664. [2022-01-31 17:43:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 658 states have (on average 1.0106382978723405) internal successors, (665), 658 states have internal predecessors, (665), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:43:51,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 670 transitions. [2022-01-31 17:43:51,295 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 670 transitions. Word has length 653 [2022-01-31 17:43:51,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:43:51,295 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 670 transitions. [2022-01-31 17:43:51,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.18348623853211) internal successors, (129), 108 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 17:43:51,296 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 670 transitions. [2022-01-31 17:43:51,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 660 [2022-01-31 17:43:51,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:43:51,299 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:43:51,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 17:43:51,299 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:43:51,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:43:51,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1995108931, now seen corresponding path program 106 times [2022-01-31 17:43:51,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:43:51,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958644794] [2022-01-31 17:43:51,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:43:51,300 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:43:51,300 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:43:51,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:43:51,335 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:43:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:54,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:43:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:43:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:43:54,788 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:43:54,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958644794] [2022-01-31 17:43:54,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1958644794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:43:54,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:43:54,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 17:43:54,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77833926] [2022-01-31 17:43:54,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:43:54,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 17:43:54,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:43:54,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 17:43:54,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 17:43:54,792 INFO L87 Difference]: Start difference. First operand 664 states and 670 transitions. Second operand has 110 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 109 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:01,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:01,214 INFO L93 Difference]: Finished difference Result 1221 states and 1238 transitions. [2022-01-31 17:44:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 17:44:01,214 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 109 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 659 [2022-01-31 17:44:01,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:01,215 INFO L225 Difference]: With dead ends: 1221 [2022-01-31 17:44:01,215 INFO L226 Difference]: Without dead ends: 670 [2022-01-31 17:44:01,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 17:44:01,217 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 2681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 3399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2681 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:01,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 3399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2681 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:44:01,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-01-31 17:44:01,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 670. [2022-01-31 17:44:01,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 664 states have (on average 1.0105421686746987) internal successors, (671), 664 states have internal predecessors, (671), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:01,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 676 transitions. [2022-01-31 17:44:01,229 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 676 transitions. Word has length 659 [2022-01-31 17:44:01,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:01,229 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 676 transitions. [2022-01-31 17:44:01,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 109 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:01,229 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 676 transitions. [2022-01-31 17:44:01,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 666 [2022-01-31 17:44:01,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:01,232 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:01,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 17:44:01,233 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:01,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:01,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2125782432, now seen corresponding path program 107 times [2022-01-31 17:44:01,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:01,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13742114] [2022-01-31 17:44:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:01,234 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:01,234 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:01,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:01,274 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:04,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:04,854 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:04,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13742114] [2022-01-31 17:44:04,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [13742114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:04,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:04,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 17:44:04,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664417190] [2022-01-31 17:44:04,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:04,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 17:44:04,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:04,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 17:44:04,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:44:04,857 INFO L87 Difference]: Start difference. First operand 670 states and 676 transitions. Second operand has 111 states, 111 states have (on average 1.1801801801801801) internal successors, (131), 110 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 17:44:11,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:11,217 INFO L93 Difference]: Finished difference Result 1232 states and 1249 transitions. [2022-01-31 17:44:11,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 17:44:11,217 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.1801801801801801) internal successors, (131), 110 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 665 [2022-01-31 17:44:11,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:11,218 INFO L225 Difference]: With dead ends: 1232 [2022-01-31 17:44:11,218 INFO L226 Difference]: Without dead ends: 676 [2022-01-31 17:44:11,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 17:44:11,220 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 2480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 3255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2480 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:11,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 3255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2480 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:44:11,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-01-31 17:44:11,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 676. [2022-01-31 17:44:11,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 670 states have (on average 1.01044776119403) internal successors, (677), 670 states have internal predecessors, (677), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:11,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 682 transitions. [2022-01-31 17:44:11,231 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 682 transitions. Word has length 665 [2022-01-31 17:44:11,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:11,231 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 682 transitions. [2022-01-31 17:44:11,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.1801801801801801) internal successors, (131), 110 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 17:44:11,232 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 682 transitions. [2022-01-31 17:44:11,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2022-01-31 17:44:11,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:11,235 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:11,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 17:44:11,235 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:11,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:11,235 INFO L85 PathProgramCache]: Analyzing trace with hash 795886563, now seen corresponding path program 108 times [2022-01-31 17:44:11,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:11,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472331625] [2022-01-31 17:44:11,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:11,236 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:11,236 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:11,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:11,270 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:14,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:14,917 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:14,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472331625] [2022-01-31 17:44:14,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1472331625] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:14,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:14,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 17:44:14,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828625201] [2022-01-31 17:44:14,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:14,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 17:44:14,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:14,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 17:44:14,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 17:44:14,920 INFO L87 Difference]: Start difference. First operand 676 states and 682 transitions. Second operand has 112 states, 112 states have (on average 1.1785714285714286) internal successors, (132), 111 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:21,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:21,417 INFO L93 Difference]: Finished difference Result 1243 states and 1260 transitions. [2022-01-31 17:44:21,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 17:44:21,417 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.1785714285714286) internal successors, (132), 111 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 671 [2022-01-31 17:44:21,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:21,418 INFO L225 Difference]: With dead ends: 1243 [2022-01-31 17:44:21,418 INFO L226 Difference]: Without dead ends: 682 [2022-01-31 17:44:21,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 17:44:21,420 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 2709 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 3456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2709 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:21,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 3456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2709 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:44:21,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-01-31 17:44:21,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2022-01-31 17:44:21,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 676 states have (on average 1.0103550295857988) internal successors, (683), 676 states have internal predecessors, (683), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:21,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 688 transitions. [2022-01-31 17:44:21,431 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 688 transitions. Word has length 671 [2022-01-31 17:44:21,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:21,431 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 688 transitions. [2022-01-31 17:44:21,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.1785714285714286) internal successors, (132), 111 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:21,432 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 688 transitions. [2022-01-31 17:44:21,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2022-01-31 17:44:21,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:21,435 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:21,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 17:44:21,435 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:21,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:21,435 INFO L85 PathProgramCache]: Analyzing trace with hash 486788480, now seen corresponding path program 109 times [2022-01-31 17:44:21,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:21,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210888369] [2022-01-31 17:44:21,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:21,436 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:21,436 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:21,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:21,470 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:25,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:25,172 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:25,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210888369] [2022-01-31 17:44:25,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1210888369] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:25,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:25,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 17:44:25,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791943055] [2022-01-31 17:44:25,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:25,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 17:44:25,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:25,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 17:44:25,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:44:25,178 INFO L87 Difference]: Start difference. First operand 682 states and 688 transitions. Second operand has 113 states, 113 states have (on average 1.176991150442478) internal successors, (133), 112 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 17:44:32,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:32,073 INFO L93 Difference]: Finished difference Result 1254 states and 1271 transitions. [2022-01-31 17:44:32,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 17:44:32,073 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.176991150442478) internal successors, (133), 112 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 677 [2022-01-31 17:44:32,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:32,074 INFO L225 Difference]: With dead ends: 1254 [2022-01-31 17:44:32,074 INFO L226 Difference]: Without dead ends: 688 [2022-01-31 17:44:32,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 17:44:32,076 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 3115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 3851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3115 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:32,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 3851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3115 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:44:32,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-01-31 17:44:32,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 688. [2022-01-31 17:44:32,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 682 states have (on average 1.0102639296187683) internal successors, (689), 682 states have internal predecessors, (689), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:32,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 694 transitions. [2022-01-31 17:44:32,088 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 694 transitions. Word has length 677 [2022-01-31 17:44:32,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:32,088 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 694 transitions. [2022-01-31 17:44:32,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.176991150442478) internal successors, (133), 112 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 17:44:32,088 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 694 transitions. [2022-01-31 17:44:32,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 684 [2022-01-31 17:44:32,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:32,091 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:32,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 17:44:32,091 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:32,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:32,091 INFO L85 PathProgramCache]: Analyzing trace with hash 245599619, now seen corresponding path program 110 times [2022-01-31 17:44:32,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:32,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612700227] [2022-01-31 17:44:32,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:32,092 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:32,092 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:32,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:32,126 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:35,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:35,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:35,897 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:35,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612700227] [2022-01-31 17:44:35,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1612700227] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:35,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:35,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 17:44:35,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498765886] [2022-01-31 17:44:35,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:35,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 17:44:35,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:35,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 17:44:35,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 17:44:35,900 INFO L87 Difference]: Start difference. First operand 688 states and 694 transitions. Second operand has 114 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 113 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:42,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:42,720 INFO L93 Difference]: Finished difference Result 1265 states and 1282 transitions. [2022-01-31 17:44:42,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 17:44:42,720 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 113 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 683 [2022-01-31 17:44:42,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:42,721 INFO L225 Difference]: With dead ends: 1265 [2022-01-31 17:44:42,721 INFO L226 Difference]: Without dead ends: 694 [2022-01-31 17:44:42,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 17:44:42,725 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 3057 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 3816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3057 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:42,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 3816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3057 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:44:42,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-01-31 17:44:42,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 694. [2022-01-31 17:44:42,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 688 states have (on average 1.010174418604651) internal successors, (695), 688 states have internal predecessors, (695), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:42,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 700 transitions. [2022-01-31 17:44:42,737 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 700 transitions. Word has length 683 [2022-01-31 17:44:42,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:42,737 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 700 transitions. [2022-01-31 17:44:42,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 113 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:42,737 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 700 transitions. [2022-01-31 17:44:42,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 690 [2022-01-31 17:44:42,740 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:42,740 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:42,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 17:44:42,740 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:42,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:42,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1153137312, now seen corresponding path program 111 times [2022-01-31 17:44:42,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:42,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041082723] [2022-01-31 17:44:42,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:42,741 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:42,741 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:42,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:42,776 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:46,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:46,617 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:46,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041082723] [2022-01-31 17:44:46,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2041082723] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:46,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:46,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 17:44:46,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614353005] [2022-01-31 17:44:46,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:46,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 17:44:46,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:46,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 17:44:46,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:44:46,620 INFO L87 Difference]: Start difference. First operand 694 states and 700 transitions. Second operand has 115 states, 115 states have (on average 1.173913043478261) internal successors, (135), 114 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 17:44:53,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:53,438 INFO L93 Difference]: Finished difference Result 1276 states and 1293 transitions. [2022-01-31 17:44:53,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 17:44:53,439 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.173913043478261) internal successors, (135), 114 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 689 [2022-01-31 17:44:53,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:53,440 INFO L225 Difference]: With dead ends: 1276 [2022-01-31 17:44:53,440 INFO L226 Difference]: Without dead ends: 700 [2022-01-31 17:44:53,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 17:44:53,442 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 2653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2653 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:53,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 59 Invalid, 3435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2653 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:44:53,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-01-31 17:44:53,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 700. [2022-01-31 17:44:53,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 694 states have (on average 1.0100864553314122) internal successors, (701), 694 states have internal predecessors, (701), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:53,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 706 transitions. [2022-01-31 17:44:53,454 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 706 transitions. Word has length 689 [2022-01-31 17:44:53,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:53,454 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 706 transitions. [2022-01-31 17:44:53,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.173913043478261) internal successors, (135), 114 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 17:44:53,454 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 706 transitions. [2022-01-31 17:44:53,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2022-01-31 17:44:53,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:53,457 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:53,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 17:44:53,457 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:53,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:53,458 INFO L85 PathProgramCache]: Analyzing trace with hash -450703581, now seen corresponding path program 112 times [2022-01-31 17:44:53,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:53,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422316355] [2022-01-31 17:44:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:53,458 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:53,459 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:53,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:53,505 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:57,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:57,380 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:57,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422316355] [2022-01-31 17:44:57,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [422316355] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:57,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:57,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 17:44:57,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559044427] [2022-01-31 17:44:57,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:57,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 17:44:57,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:57,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 17:44:57,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 17:44:57,382 INFO L87 Difference]: Start difference. First operand 700 states and 706 transitions. Second operand has 116 states, 116 states have (on average 1.1724137931034482) internal successors, (136), 115 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:04,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:04,413 INFO L93 Difference]: Finished difference Result 1287 states and 1304 transitions. [2022-01-31 17:45:04,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 17:45:04,414 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.1724137931034482) internal successors, (136), 115 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 695 [2022-01-31 17:45:04,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:04,415 INFO L225 Difference]: With dead ends: 1287 [2022-01-31 17:45:04,415 INFO L226 Difference]: Without dead ends: 706 [2022-01-31 17:45:04,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 17:45:04,417 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 3050 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 3872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3050 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:04,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 69 Invalid, 3872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3050 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:45:04,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-01-31 17:45:04,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 706. [2022-01-31 17:45:04,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 700 states have (on average 1.01) internal successors, (707), 700 states have internal predecessors, (707), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:04,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 712 transitions. [2022-01-31 17:45:04,429 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 712 transitions. Word has length 695 [2022-01-31 17:45:04,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:04,429 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 712 transitions. [2022-01-31 17:45:04,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.1724137931034482) internal successors, (136), 115 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:04,429 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 712 transitions. [2022-01-31 17:45:04,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 702 [2022-01-31 17:45:04,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:04,432 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:04,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 17:45:04,432 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:04,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:04,433 INFO L85 PathProgramCache]: Analyzing trace with hash -726072000, now seen corresponding path program 113 times [2022-01-31 17:45:04,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:04,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115721395] [2022-01-31 17:45:04,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:04,433 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:04,434 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:04,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:04,492 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:08,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:08,403 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:08,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115721395] [2022-01-31 17:45:08,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2115721395] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:08,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:08,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 17:45:08,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576084316] [2022-01-31 17:45:08,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:08,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 17:45:08,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:08,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 17:45:08,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:45:08,405 INFO L87 Difference]: Start difference. First operand 706 states and 712 transitions. Second operand has 117 states, 117 states have (on average 1.170940170940171) internal successors, (137), 116 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 17:45:15,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:15,744 INFO L93 Difference]: Finished difference Result 1298 states and 1315 transitions. [2022-01-31 17:45:15,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 17:45:15,744 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.170940170940171) internal successors, (137), 116 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 701 [2022-01-31 17:45:15,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:15,745 INFO L225 Difference]: With dead ends: 1298 [2022-01-31 17:45:15,745 INFO L226 Difference]: Without dead ends: 712 [2022-01-31 17:45:15,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 17:45:15,748 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 2992 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 3769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2992 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:15,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 3769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2992 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:45:15,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-01-31 17:45:15,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 712. [2022-01-31 17:45:15,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 706 states have (on average 1.0099150141643058) internal successors, (713), 706 states have internal predecessors, (713), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:15,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 718 transitions. [2022-01-31 17:45:15,760 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 718 transitions. Word has length 701 [2022-01-31 17:45:15,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:15,760 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 718 transitions. [2022-01-31 17:45:15,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.170940170940171) internal successors, (137), 116 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 17:45:15,760 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 718 transitions. [2022-01-31 17:45:15,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2022-01-31 17:45:15,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:15,764 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:15,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 17:45:15,764 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:15,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:15,764 INFO L85 PathProgramCache]: Analyzing trace with hash -2062808893, now seen corresponding path program 114 times [2022-01-31 17:45:15,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:15,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453627005] [2022-01-31 17:45:15,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:15,765 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:15,765 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:15,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:15,811 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:19,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:19,818 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:19,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453627005] [2022-01-31 17:45:19,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1453627005] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:19,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:19,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 17:45:19,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001982845] [2022-01-31 17:45:19,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:19,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 17:45:19,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:19,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 17:45:19,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 17:45:19,822 INFO L87 Difference]: Start difference. First operand 712 states and 718 transitions. Second operand has 118 states, 118 states have (on average 1.1694915254237288) internal successors, (138), 117 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:27,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:27,232 INFO L93 Difference]: Finished difference Result 1309 states and 1326 transitions. [2022-01-31 17:45:27,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 17:45:27,233 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.1694915254237288) internal successors, (138), 117 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 707 [2022-01-31 17:45:27,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:27,234 INFO L225 Difference]: With dead ends: 1309 [2022-01-31 17:45:27,234 INFO L226 Difference]: Without dead ends: 718 [2022-01-31 17:45:27,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 17:45:27,236 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 3237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 4003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3237 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:27,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 4003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3237 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:45:27,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-01-31 17:45:27,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 718. [2022-01-31 17:45:27,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 712 states have (on average 1.0098314606741574) internal successors, (719), 712 states have internal predecessors, (719), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:27,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 724 transitions. [2022-01-31 17:45:27,248 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 724 transitions. Word has length 707 [2022-01-31 17:45:27,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:27,248 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 724 transitions. [2022-01-31 17:45:27,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.1694915254237288) internal successors, (138), 117 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:27,248 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 724 transitions. [2022-01-31 17:45:27,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2022-01-31 17:45:27,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:27,251 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:27,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 17:45:27,251 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:27,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:27,252 INFO L85 PathProgramCache]: Analyzing trace with hash -484225760, now seen corresponding path program 115 times [2022-01-31 17:45:27,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:27,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818367334] [2022-01-31 17:45:27,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:27,253 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:27,253 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:27,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:27,297 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:31,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:31,351 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 17:45:31,351 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:31,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818367334] [2022-01-31 17:45:31,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1818367334] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:31,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:31,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 17:45:31,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148979395] [2022-01-31 17:45:31,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:31,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 17:45:31,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:31,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 17:45:31,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:45:31,354 INFO L87 Difference]: Start difference. First operand 718 states and 724 transitions. Second operand has 119 states, 119 states have (on average 1.1680672268907564) internal successors, (139), 118 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 17:45:39,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:39,194 INFO L93 Difference]: Finished difference Result 1320 states and 1337 transitions. [2022-01-31 17:45:39,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 17:45:39,194 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.1680672268907564) internal successors, (139), 118 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 713 [2022-01-31 17:45:39,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:39,195 INFO L225 Difference]: With dead ends: 1320 [2022-01-31 17:45:39,195 INFO L226 Difference]: Without dead ends: 724 [2022-01-31 17:45:39,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 17:45:39,198 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 3524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 4262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3524 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:39,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 4262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3524 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:45:39,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-01-31 17:45:39,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 724. [2022-01-31 17:45:39,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 718 states have (on average 1.00974930362117) internal successors, (725), 718 states have internal predecessors, (725), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:39,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 730 transitions. [2022-01-31 17:45:39,209 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 730 transitions. Word has length 713 [2022-01-31 17:45:39,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:39,209 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 730 transitions. [2022-01-31 17:45:39,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.1680672268907564) internal successors, (139), 118 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 17:45:39,209 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 730 transitions. [2022-01-31 17:45:39,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 720 [2022-01-31 17:45:39,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:39,212 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 116, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:39,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 17:45:39,213 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:39,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:39,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1577239965, now seen corresponding path program 116 times [2022-01-31 17:45:39,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:39,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517293133] [2022-01-31 17:45:39,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:39,214 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:39,214 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:39,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:39,258 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:43,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:43,391 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:43,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517293133] [2022-01-31 17:45:43,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1517293133] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:43,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:43,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 17:45:43,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867557892] [2022-01-31 17:45:43,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:43,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 17:45:43,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:43,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 17:45:43,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 17:45:43,394 INFO L87 Difference]: Start difference. First operand 724 states and 730 transitions. Second operand has 120 states, 120 states have (on average 1.1666666666666667) internal successors, (140), 119 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:51,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:51,488 INFO L93 Difference]: Finished difference Result 1331 states and 1348 transitions. [2022-01-31 17:45:51,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 17:45:51,488 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.1666666666666667) internal successors, (140), 119 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 719 [2022-01-31 17:45:51,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:51,489 INFO L225 Difference]: With dead ends: 1331 [2022-01-31 17:45:51,489 INFO L226 Difference]: Without dead ends: 730 [2022-01-31 17:45:51,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 17:45:51,492 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 4173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 4951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4173 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:51,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 4951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4173 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:45:51,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-01-31 17:45:51,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 730. [2022-01-31 17:45:51,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 724 states have (on average 1.0096685082872927) internal successors, (731), 724 states have internal predecessors, (731), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:51,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 736 transitions. [2022-01-31 17:45:51,503 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 736 transitions. Word has length 719 [2022-01-31 17:45:51,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:51,503 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 736 transitions. [2022-01-31 17:45:51,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.1666666666666667) internal successors, (140), 119 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:51,503 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 736 transitions. [2022-01-31 17:45:51,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2022-01-31 17:45:51,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:51,507 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 117, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:51,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 17:45:51,507 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:51,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:51,507 INFO L85 PathProgramCache]: Analyzing trace with hash 2126863616, now seen corresponding path program 117 times [2022-01-31 17:45:51,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:51,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875373375] [2022-01-31 17:45:51,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:51,508 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:51,508 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:51,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:51,552 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:55,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:55,886 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:55,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875373375] [2022-01-31 17:45:55,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [875373375] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:55,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:55,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 17:45:55,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610713309] [2022-01-31 17:45:55,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:55,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 17:45:55,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:55,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 17:45:55,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:45:55,890 INFO L87 Difference]: Start difference. First operand 730 states and 736 transitions. Second operand has 121 states, 121 states have (on average 1.165289256198347) internal successors, (141), 120 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 17:46:04,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:04,060 INFO L93 Difference]: Finished difference Result 1342 states and 1359 transitions. [2022-01-31 17:46:04,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 17:46:04,060 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.165289256198347) internal successors, (141), 120 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 725 [2022-01-31 17:46:04,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:04,061 INFO L225 Difference]: With dead ends: 1342 [2022-01-31 17:46:04,061 INFO L226 Difference]: Without dead ends: 736 [2022-01-31 17:46:04,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 17:46:04,064 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 3332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 4116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3332 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:04,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 4116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3332 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:46:04,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-01-31 17:46:04,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 736. [2022-01-31 17:46:04,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 730 states have (on average 1.0095890410958903) internal successors, (737), 730 states have internal predecessors, (737), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:04,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 742 transitions. [2022-01-31 17:46:04,075 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 742 transitions. Word has length 725 [2022-01-31 17:46:04,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:04,075 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 742 transitions. [2022-01-31 17:46:04,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.165289256198347) internal successors, (141), 120 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 17:46:04,076 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 742 transitions. [2022-01-31 17:46:04,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2022-01-31 17:46:04,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:04,079 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 118, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:04,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 17:46:04,079 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:04,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:04,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1324063741, now seen corresponding path program 118 times [2022-01-31 17:46:04,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:04,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266375820] [2022-01-31 17:46:04,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:04,080 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:04,080 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:04,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:04,134 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:08,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:08,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:08,383 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 17:46:08,383 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:08,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266375820] [2022-01-31 17:46:08,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1266375820] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:08,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:08,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 17:46:08,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676410291] [2022-01-31 17:46:08,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:08,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 17:46:08,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:08,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 17:46:08,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 17:46:08,387 INFO L87 Difference]: Start difference. First operand 736 states and 742 transitions. Second operand has 122 states, 122 states have (on average 1.1639344262295082) internal successors, (142), 121 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:16,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:16,467 INFO L93 Difference]: Finished difference Result 1353 states and 1370 transitions. [2022-01-31 17:46:16,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 17:46:16,467 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.1639344262295082) internal successors, (142), 121 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 731 [2022-01-31 17:46:16,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:16,468 INFO L225 Difference]: With dead ends: 1353 [2022-01-31 17:46:16,468 INFO L226 Difference]: Without dead ends: 742 [2022-01-31 17:46:16,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 17:46:16,471 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 2900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 3775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2900 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:16,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 74 Invalid, 3775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2900 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:46:16,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-01-31 17:46:16,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 742. [2022-01-31 17:46:16,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 736 states have (on average 1.0095108695652173) internal successors, (743), 736 states have internal predecessors, (743), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:16,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 748 transitions. [2022-01-31 17:46:16,482 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 748 transitions. Word has length 731 [2022-01-31 17:46:16,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:16,482 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 748 transitions. [2022-01-31 17:46:16,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.1639344262295082) internal successors, (142), 121 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:16,482 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 748 transitions. [2022-01-31 17:46:16,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 738 [2022-01-31 17:46:16,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:16,486 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 119, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:16,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 17:46:16,486 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:16,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:16,486 INFO L85 PathProgramCache]: Analyzing trace with hash 2120299744, now seen corresponding path program 119 times [2022-01-31 17:46:16,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:16,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011346553] [2022-01-31 17:46:16,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:16,487 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:16,487 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:16,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:16,533 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:20,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:20,844 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:20,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011346553] [2022-01-31 17:46:20,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2011346553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:20,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:20,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 17:46:20,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481961762] [2022-01-31 17:46:20,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:20,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 17:46:20,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:20,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 17:46:20,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:46:20,847 INFO L87 Difference]: Start difference. First operand 742 states and 748 transitions. Second operand has 123 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 122 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 17:46:29,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:29,121 INFO L93 Difference]: Finished difference Result 1364 states and 1381 transitions. [2022-01-31 17:46:29,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 17:46:29,121 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 122 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 737 [2022-01-31 17:46:29,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:29,122 INFO L225 Difference]: With dead ends: 1364 [2022-01-31 17:46:29,122 INFO L226 Difference]: Without dead ends: 748 [2022-01-31 17:46:29,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 17:46:29,125 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 3374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 4221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3374 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:29,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 4221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3374 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:46:29,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-01-31 17:46:29,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 748. [2022-01-31 17:46:29,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 742 states have (on average 1.009433962264151) internal successors, (749), 742 states have internal predecessors, (749), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:29,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 754 transitions. [2022-01-31 17:46:29,137 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 754 transitions. Word has length 737 [2022-01-31 17:46:29,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:29,137 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 754 transitions. [2022-01-31 17:46:29,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 122 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 17:46:29,137 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 754 transitions. [2022-01-31 17:46:29,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 744 [2022-01-31 17:46:29,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:29,141 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:29,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 17:46:29,141 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:29,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:29,141 INFO L85 PathProgramCache]: Analyzing trace with hash -923826781, now seen corresponding path program 120 times [2022-01-31 17:46:29,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:29,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059523268] [2022-01-31 17:46:29,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:29,142 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:29,142 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:29,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:29,189 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:33,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:33,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:33,595 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:33,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059523268] [2022-01-31 17:46:33,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1059523268] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:33,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:33,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 17:46:33,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714679870] [2022-01-31 17:46:33,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:33,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 17:46:33,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:33,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 17:46:33,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 17:46:33,599 INFO L87 Difference]: Start difference. First operand 748 states and 754 transitions. Second operand has 124 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 123 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:41,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:41,742 INFO L93 Difference]: Finished difference Result 1375 states and 1392 transitions. [2022-01-31 17:46:41,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 17:46:41,742 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 123 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 743 [2022-01-31 17:46:41,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:41,743 INFO L225 Difference]: With dead ends: 1375 [2022-01-31 17:46:41,743 INFO L226 Difference]: Without dead ends: 754 [2022-01-31 17:46:41,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 17:46:41,746 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 3334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 4136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3334 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:41,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 4136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3334 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:46:41,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-01-31 17:46:41,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2022-01-31 17:46:41,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 748 states have (on average 1.0093582887700534) internal successors, (755), 748 states have internal predecessors, (755), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 760 transitions. [2022-01-31 17:46:41,757 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 760 transitions. Word has length 743 [2022-01-31 17:46:41,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:41,758 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 760 transitions. [2022-01-31 17:46:41,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 123 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:41,758 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 760 transitions. [2022-01-31 17:46:41,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2022-01-31 17:46:41,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:41,761 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 121, 121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:41,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 17:46:41,762 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:41,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:41,762 INFO L85 PathProgramCache]: Analyzing trace with hash 389600448, now seen corresponding path program 121 times [2022-01-31 17:46:41,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:41,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085122513] [2022-01-31 17:46:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:41,763 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:41,763 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:41,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:41,810 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:46,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:46,270 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:46,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085122513] [2022-01-31 17:46:46,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1085122513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:46,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:46,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 17:46:46,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098537821] [2022-01-31 17:46:46,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:46,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 17:46:46,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:46,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 17:46:46,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:46:46,274 INFO L87 Difference]: Start difference. First operand 754 states and 760 transitions. Second operand has 125 states, 125 states have (on average 1.16) internal successors, (145), 124 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 17:46:54,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:54,761 INFO L93 Difference]: Finished difference Result 1386 states and 1403 transitions. [2022-01-31 17:46:54,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 17:46:54,761 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.16) internal successors, (145), 124 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 749 [2022-01-31 17:46:54,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:54,762 INFO L225 Difference]: With dead ends: 1386 [2022-01-31 17:46:54,762 INFO L226 Difference]: Without dead ends: 760 [2022-01-31 17:46:54,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 17:46:54,764 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 3057 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3057 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:54,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 59 Invalid, 3899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3057 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:46:54,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-01-31 17:46:54,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 760. [2022-01-31 17:46:54,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 754 states have (on average 1.009283819628647) internal successors, (761), 754 states have internal predecessors, (761), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:54,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 766 transitions. [2022-01-31 17:46:54,776 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 766 transitions. Word has length 749 [2022-01-31 17:46:54,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:54,776 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 766 transitions. [2022-01-31 17:46:54,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.16) internal successors, (145), 124 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 17:46:54,776 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 766 transitions. [2022-01-31 17:46:54,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2022-01-31 17:46:54,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:54,780 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 122, 122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:54,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 17:46:54,780 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:54,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:54,780 INFO L85 PathProgramCache]: Analyzing trace with hash -2119393469, now seen corresponding path program 122 times [2022-01-31 17:46:54,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:54,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493684770] [2022-01-31 17:46:54,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:54,781 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:54,781 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:54,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:54,830 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:59,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:59,394 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:59,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493684770] [2022-01-31 17:46:59,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [493684770] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:59,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:59,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 17:46:59,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397085333] [2022-01-31 17:46:59,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:59,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 17:46:59,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:59,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 17:46:59,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 17:46:59,396 INFO L87 Difference]: Start difference. First operand 760 states and 766 transitions. Second operand has 126 states, 126 states have (on average 1.1587301587301588) internal successors, (146), 125 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:08,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:08,149 INFO L93 Difference]: Finished difference Result 1397 states and 1414 transitions. [2022-01-31 17:47:08,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 17:47:08,149 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.1587301587301588) internal successors, (146), 125 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 755 [2022-01-31 17:47:08,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:08,150 INFO L225 Difference]: With dead ends: 1397 [2022-01-31 17:47:08,150 INFO L226 Difference]: Without dead ends: 766 [2022-01-31 17:47:08,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 17:47:08,152 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 3114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 3996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3114 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:08,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 69 Invalid, 3996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3114 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:47:08,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-01-31 17:47:08,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 766. [2022-01-31 17:47:08,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 760 states have (on average 1.0092105263157896) internal successors, (767), 760 states have internal predecessors, (767), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:08,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 772 transitions. [2022-01-31 17:47:08,164 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 772 transitions. Word has length 755 [2022-01-31 17:47:08,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:08,164 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 772 transitions. [2022-01-31 17:47:08,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.1587301587301588) internal successors, (146), 125 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:08,165 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 772 transitions. [2022-01-31 17:47:08,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2022-01-31 17:47:08,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:08,168 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 123, 123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:08,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 17:47:08,168 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:08,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:08,169 INFO L85 PathProgramCache]: Analyzing trace with hash -49398624, now seen corresponding path program 123 times [2022-01-31 17:47:08,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:08,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95080236] [2022-01-31 17:47:08,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:08,170 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:08,170 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:08,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:08,218 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:12,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:12,835 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:12,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95080236] [2022-01-31 17:47:12,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [95080236] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:12,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:12,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 17:47:12,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857069631] [2022-01-31 17:47:12,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:12,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 17:47:12,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:12,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 17:47:12,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:47:12,838 INFO L87 Difference]: Start difference. First operand 766 states and 772 transitions. Second operand has 127 states, 127 states have (on average 1.1574803149606299) internal successors, (147), 126 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 17:47:21,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:21,788 INFO L93 Difference]: Finished difference Result 1408 states and 1425 transitions. [2022-01-31 17:47:21,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 17:47:21,789 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.1574803149606299) internal successors, (147), 126 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 761 [2022-01-31 17:47:21,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:21,790 INFO L225 Difference]: With dead ends: 1408 [2022-01-31 17:47:21,790 INFO L226 Difference]: Without dead ends: 772 [2022-01-31 17:47:21,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 17:47:21,793 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 3799 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 4619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3799 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:21,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 4619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3799 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:47:21,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-01-31 17:47:21,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 772. [2022-01-31 17:47:21,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 766 states have (on average 1.0091383812010444) internal successors, (773), 766 states have internal predecessors, (773), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 778 transitions. [2022-01-31 17:47:21,805 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 778 transitions. Word has length 761 [2022-01-31 17:47:21,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:21,805 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 778 transitions. [2022-01-31 17:47:21,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.1574803149606299) internal successors, (147), 126 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 17:47:21,805 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 778 transitions. [2022-01-31 17:47:21,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 768 [2022-01-31 17:47:21,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:21,809 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 124, 124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:21,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 17:47:21,810 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:21,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:21,810 INFO L85 PathProgramCache]: Analyzing trace with hash -722882333, now seen corresponding path program 124 times [2022-01-31 17:47:21,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:21,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34191155] [2022-01-31 17:47:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:21,811 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:21,811 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:21,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:21,864 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:26,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:26,576 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:26,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34191155] [2022-01-31 17:47:26,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [34191155] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:26,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:26,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 17:47:26,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610468023] [2022-01-31 17:47:26,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:26,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 17:47:26,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:26,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 17:47:26,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 17:47:26,578 INFO L87 Difference]: Start difference. First operand 772 states and 778 transitions. Second operand has 128 states, 128 states have (on average 1.15625) internal successors, (148), 127 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:35,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:35,927 INFO L93 Difference]: Finished difference Result 1419 states and 1436 transitions. [2022-01-31 17:47:35,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 17:47:35,927 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.15625) internal successors, (148), 127 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 767 [2022-01-31 17:47:35,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:35,928 INFO L225 Difference]: With dead ends: 1419 [2022-01-31 17:47:35,929 INFO L226 Difference]: Without dead ends: 778 [2022-01-31 17:47:35,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 17:47:35,931 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 3579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 4439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3579 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:35,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 59 Invalid, 4439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3579 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:47:35,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-01-31 17:47:35,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 778. [2022-01-31 17:47:35,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 772 states have (on average 1.0090673575129534) internal successors, (779), 772 states have internal predecessors, (779), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:35,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 784 transitions. [2022-01-31 17:47:35,943 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 784 transitions. Word has length 767 [2022-01-31 17:47:35,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:35,944 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 784 transitions. [2022-01-31 17:47:35,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.15625) internal successors, (148), 127 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:35,944 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 784 transitions. [2022-01-31 17:47:35,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2022-01-31 17:47:35,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:35,966 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 125, 125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:35,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 17:47:35,967 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:35,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:35,967 INFO L85 PathProgramCache]: Analyzing trace with hash -2111607680, now seen corresponding path program 125 times [2022-01-31 17:47:35,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:35,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163036515] [2022-01-31 17:47:35,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:35,968 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:35,968 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:35,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:36,028 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:40,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:40,777 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 17:47:40,777 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:40,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163036515] [2022-01-31 17:47:40,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1163036515] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:40,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:40,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 17:47:40,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65216968] [2022-01-31 17:47:40,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:40,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 17:47:40,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:40,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 17:47:40,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:47:40,780 INFO L87 Difference]: Start difference. First operand 778 states and 784 transitions. Second operand has 129 states, 129 states have (on average 1.1550387596899225) internal successors, (149), 128 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 17:47:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:50,137 INFO L93 Difference]: Finished difference Result 1430 states and 1447 transitions. [2022-01-31 17:47:50,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 17:47:50,137 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.1550387596899225) internal successors, (149), 128 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 773 [2022-01-31 17:47:50,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:50,139 INFO L225 Difference]: With dead ends: 1430 [2022-01-31 17:47:50,139 INFO L226 Difference]: Without dead ends: 784 [2022-01-31 17:47:50,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 17:47:50,141 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 3657 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 4489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3657 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:50,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 4489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3657 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:47:50,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-01-31 17:47:50,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2022-01-31 17:47:50,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 778 states have (on average 1.0089974293059125) internal successors, (785), 778 states have internal predecessors, (785), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 790 transitions. [2022-01-31 17:47:50,153 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 790 transitions. Word has length 773 [2022-01-31 17:47:50,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:50,154 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 790 transitions. [2022-01-31 17:47:50,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.1550387596899225) internal successors, (149), 128 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 17:47:50,154 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 790 transitions. [2022-01-31 17:47:50,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2022-01-31 17:47:50,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:50,158 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:50,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 17:47:50,158 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:50,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:50,158 INFO L85 PathProgramCache]: Analyzing trace with hash -37438845, now seen corresponding path program 126 times [2022-01-31 17:47:50,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:50,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863877112] [2022-01-31 17:47:50,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:50,159 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:50,159 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:50,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:50,211 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:55,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:55,027 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:55,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863877112] [2022-01-31 17:47:55,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [863877112] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:55,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:55,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 17:47:55,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574189357] [2022-01-31 17:47:55,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:55,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 17:47:55,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:55,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 17:47:55,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 17:47:55,038 INFO L87 Difference]: Start difference. First operand 784 states and 790 transitions. Second operand has 130 states, 130 states have (on average 1.1538461538461537) internal successors, (150), 129 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:04,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:04,692 INFO L93 Difference]: Finished difference Result 1441 states and 1458 transitions. [2022-01-31 17:48:04,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 17:48:04,693 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.1538461538461537) internal successors, (150), 129 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 779 [2022-01-31 17:48:04,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:04,694 INFO L225 Difference]: With dead ends: 1441 [2022-01-31 17:48:04,694 INFO L226 Difference]: Without dead ends: 790 [2022-01-31 17:48:04,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 17:48:04,697 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 3616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 4488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3616 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:04,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 59 Invalid, 4488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3616 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:48:04,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-01-31 17:48:04,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 790. [2022-01-31 17:48:04,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 784 states have (on average 1.0089285714285714) internal successors, (791), 784 states have internal predecessors, (791), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:04,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 796 transitions. [2022-01-31 17:48:04,722 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 796 transitions. Word has length 779 [2022-01-31 17:48:04,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:04,723 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 796 transitions. [2022-01-31 17:48:04,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.1538461538461537) internal successors, (150), 129 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:04,723 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 796 transitions. [2022-01-31 17:48:04,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2022-01-31 17:48:04,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:04,727 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 127, 127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:04,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 17:48:04,727 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:04,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:04,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1220909984, now seen corresponding path program 127 times [2022-01-31 17:48:04,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:04,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135497511] [2022-01-31 17:48:04,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:04,728 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:04,728 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:04,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:04,779 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:09,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:09,819 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 17:48:09,820 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:09,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135497511] [2022-01-31 17:48:09,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1135497511] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:09,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:09,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 17:48:09,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957303145] [2022-01-31 17:48:09,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:09,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 17:48:09,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:09,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 17:48:09,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:48:09,822 INFO L87 Difference]: Start difference. First operand 790 states and 796 transitions. Second operand has 131 states, 131 states have (on average 1.1526717557251909) internal successors, (151), 130 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 17:48:19,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:19,322 INFO L93 Difference]: Finished difference Result 1452 states and 1469 transitions. [2022-01-31 17:48:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 17:48:19,322 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.1526717557251909) internal successors, (151), 130 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 785 [2022-01-31 17:48:19,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:19,323 INFO L225 Difference]: With dead ends: 1452 [2022-01-31 17:48:19,323 INFO L226 Difference]: Without dead ends: 796 [2022-01-31 17:48:19,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8255 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 17:48:19,326 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 3283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 4195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3283 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:19,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 69 Invalid, 4195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3283 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:48:19,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-01-31 17:48:19,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 796. [2022-01-31 17:48:19,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 790 states have (on average 1.008860759493671) internal successors, (797), 790 states have internal predecessors, (797), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:19,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 802 transitions. [2022-01-31 17:48:19,339 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 802 transitions. Word has length 785 [2022-01-31 17:48:19,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:19,339 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 802 transitions. [2022-01-31 17:48:19,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.1526717557251909) internal successors, (151), 130 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 17:48:19,339 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 802 transitions. [2022-01-31 17:48:19,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 792 [2022-01-31 17:48:19,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:19,343 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:19,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 17:48:19,343 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:19,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:19,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1490795555, now seen corresponding path program 128 times [2022-01-31 17:48:19,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:19,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309933393] [2022-01-31 17:48:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:19,344 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:19,345 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:19,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:19,397 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:24,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:24,342 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:24,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309933393] [2022-01-31 17:48:24,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [309933393] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:24,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:24,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 17:48:24,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997637231] [2022-01-31 17:48:24,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:24,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 17:48:24,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:24,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 17:48:24,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 17:48:24,346 INFO L87 Difference]: Start difference. First operand 796 states and 802 transitions. Second operand has 132 states, 132 states have (on average 1.1515151515151516) internal successors, (152), 131 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:34,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:34,121 INFO L93 Difference]: Finished difference Result 1463 states and 1480 transitions. [2022-01-31 17:48:34,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 17:48:34,121 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.1515151515151516) internal successors, (152), 131 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 791 [2022-01-31 17:48:34,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:34,123 INFO L225 Difference]: With dead ends: 1463 [2022-01-31 17:48:34,123 INFO L226 Difference]: Without dead ends: 802 [2022-01-31 17:48:34,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 17:48:34,125 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 3456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 4340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3456 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:34,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 59 Invalid, 4340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3456 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:48:34,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-01-31 17:48:34,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 802. [2022-01-31 17:48:34,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 796 states have (on average 1.0087939698492463) internal successors, (803), 796 states have internal predecessors, (803), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:34,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 808 transitions. [2022-01-31 17:48:34,138 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 808 transitions. Word has length 791 [2022-01-31 17:48:34,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:34,138 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 808 transitions. [2022-01-31 17:48:34,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.1515151515151516) internal successors, (152), 131 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:34,138 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 808 transitions. [2022-01-31 17:48:34,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 798 [2022-01-31 17:48:34,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:34,142 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 129, 129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:34,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 17:48:34,142 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:34,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:34,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1953160128, now seen corresponding path program 129 times [2022-01-31 17:48:34,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:34,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680009481] [2022-01-31 17:48:34,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:34,144 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:34,144 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:34,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:34,210 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:39,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:39,215 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:39,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680009481] [2022-01-31 17:48:39,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1680009481] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:39,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:39,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 17:48:39,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862449320] [2022-01-31 17:48:39,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:39,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 17:48:39,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:39,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 17:48:39,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:48:39,219 INFO L87 Difference]: Start difference. First operand 802 states and 808 transitions. Second operand has 133 states, 133 states have (on average 1.150375939849624) internal successors, (153), 132 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 17:48:49,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:49,200 INFO L93 Difference]: Finished difference Result 1474 states and 1491 transitions. [2022-01-31 17:48:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 17:48:49,201 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 1.150375939849624) internal successors, (153), 132 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 797 [2022-01-31 17:48:49,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:49,202 INFO L225 Difference]: With dead ends: 1474 [2022-01-31 17:48:49,202 INFO L226 Difference]: Without dead ends: 808 [2022-01-31 17:48:49,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 17:48:49,205 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 3411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 4335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3411 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:49,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 69 Invalid, 4335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3411 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:48:49,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-01-31 17:48:49,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 808. [2022-01-31 17:48:49,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 802 states have (on average 1.0087281795511223) internal successors, (809), 802 states have internal predecessors, (809), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:49,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 814 transitions. [2022-01-31 17:48:49,218 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 814 transitions. Word has length 797 [2022-01-31 17:48:49,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:49,218 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 814 transitions. [2022-01-31 17:48:49,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 1.150375939849624) internal successors, (153), 132 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 17:48:49,218 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 814 transitions. [2022-01-31 17:48:49,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 804 [2022-01-31 17:48:49,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:49,222 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:49,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 17:48:49,222 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:49,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:49,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1145877955, now seen corresponding path program 130 times [2022-01-31 17:48:49,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:49,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196829647] [2022-01-31 17:48:49,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:49,223 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:49,223 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:49,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:49,291 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:54,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:54,408 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:54,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196829647] [2022-01-31 17:48:54,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1196829647] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:54,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:54,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 17:48:54,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428654537] [2022-01-31 17:48:54,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:54,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 17:48:54,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:54,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 17:48:54,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 17:48:54,413 INFO L87 Difference]: Start difference. First operand 808 states and 814 transitions. Second operand has 134 states, 134 states have (on average 1.1492537313432836) internal successors, (154), 133 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:04,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:04,616 INFO L93 Difference]: Finished difference Result 1485 states and 1502 transitions. [2022-01-31 17:49:04,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 17:49:04,616 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.1492537313432836) internal successors, (154), 133 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 803 [2022-01-31 17:49:04,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:04,617 INFO L225 Difference]: With dead ends: 1485 [2022-01-31 17:49:04,617 INFO L226 Difference]: Without dead ends: 814 [2022-01-31 17:49:04,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8645 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 17:49:04,620 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 3444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 4357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3444 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:04,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 4357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3444 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:49:04,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-01-31 17:49:04,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 814. [2022-01-31 17:49:04,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 808 states have (on average 1.0086633663366336) internal successors, (815), 808 states have internal predecessors, (815), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:04,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 820 transitions. [2022-01-31 17:49:04,632 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 820 transitions. Word has length 803 [2022-01-31 17:49:04,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:04,633 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 820 transitions. [2022-01-31 17:49:04,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.1492537313432836) internal successors, (154), 133 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:04,633 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 820 transitions. [2022-01-31 17:49:04,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2022-01-31 17:49:04,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:04,637 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 131, 131, 131, 131, 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 17:49:04,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 17:49:04,637 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:04,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:04,637 INFO L85 PathProgramCache]: Analyzing trace with hash -319443936, now seen corresponding path program 131 times [2022-01-31 17:49:04,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:04,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899851656] [2022-01-31 17:49:04,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:04,638 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:04,638 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:04,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:04,701 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:09,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:09,867 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:09,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899851656] [2022-01-31 17:49:09,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1899851656] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:09,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:09,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 17:49:09,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543871206] [2022-01-31 17:49:09,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:09,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 17:49:09,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:09,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 17:49:09,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:49:09,871 INFO L87 Difference]: Start difference. First operand 814 states and 820 transitions. Second operand has 135 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 134 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 17:49:20,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:20,559 INFO L93 Difference]: Finished difference Result 1496 states and 1513 transitions. [2022-01-31 17:49:20,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 17:49:20,560 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 134 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 809 [2022-01-31 17:49:20,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:20,561 INFO L225 Difference]: With dead ends: 1496 [2022-01-31 17:49:20,561 INFO L226 Difference]: Without dead ends: 820 [2022-01-31 17:49:20,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8777 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=26733, Invalid=44289, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 17:49:20,564 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 3678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 4580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3678 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:20,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 59 Invalid, 4580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3678 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:49:20,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-01-31 17:49:20,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 820. [2022-01-31 17:49:20,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 814 states have (on average 1.0085995085995085) internal successors, (821), 814 states have internal predecessors, (821), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:20,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 826 transitions. [2022-01-31 17:49:20,576 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 826 transitions. Word has length 809 [2022-01-31 17:49:20,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:20,577 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 826 transitions. [2022-01-31 17:49:20,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 134 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 17:49:20,577 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 826 transitions. [2022-01-31 17:49:20,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 816 [2022-01-31 17:49:20,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:20,581 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 132, 132, 132, 132, 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 17:49:20,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 17:49:20,581 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:20,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:20,581 INFO L85 PathProgramCache]: Analyzing trace with hash -4872349, now seen corresponding path program 132 times [2022-01-31 17:49:20,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:20,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100166921] [2022-01-31 17:49:20,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:20,582 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:20,582 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:20,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:20,648 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:25,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:25,966 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:25,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100166921] [2022-01-31 17:49:25,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2100166921] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:25,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:25,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 17:49:25,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254292715] [2022-01-31 17:49:25,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:25,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 17:49:25,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:25,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 17:49:25,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 17:49:25,971 INFO L87 Difference]: Start difference. First operand 820 states and 826 transitions. Second operand has 136 states, 136 states have (on average 1.1470588235294117) internal successors, (156), 135 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)