/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_strcmp_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:58:40,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:58:40,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:58:40,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:58:40,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:58:40,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:58:40,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:58:40,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:58:40,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:58:40,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:58:40,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:58:40,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:58:40,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:58:40,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:58:40,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:58:40,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:58:40,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:58:40,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:58:40,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:58:40,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:58:40,612 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 17:58:40,621 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:58:40,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:58:40,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:58:40,622 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:58:40,622 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:58:40,622 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:58:40,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:58:40,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:58:40,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:58:40,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:58:40,622 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:58:40,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:58:40,623 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:58:40,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:58:40,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:58:40,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:58:40,623 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:58:40,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:58:40,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:58:40,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:58:40,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:58:40,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:58:40,624 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:58:40,624 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:58:40,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:58:40,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:58:40,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:58:40,863 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:58:40,864 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:58:40,865 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcmp_ground.i [2022-01-31 17:58:40,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc50a5dd3/82c2bbc765f64904a05c31b9b3d4f035/FLAGa482dc9ca [2022-01-31 17:58:41,291 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:58:41,291 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_strcmp_ground.i [2022-01-31 17:58:41,296 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc50a5dd3/82c2bbc765f64904a05c31b9b3d4f035/FLAGa482dc9ca [2022-01-31 17:58:41,308 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc50a5dd3/82c2bbc765f64904a05c31b9b3d4f035 [2022-01-31 17:58:41,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:58:41,312 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:58:41,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:58:41,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:58:41,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:58:41,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:58:41" (1/1) ... [2022-01-31 17:58:41,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ef00b6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:41, skipping insertion in model container [2022-01-31 17:58:41,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:58:41" (1/1) ... [2022-01-31 17:58:41,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:58:41,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:58:41,466 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_strcmp_ground.i[815,828] [2022-01-31 17:58:41,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:58:41,485 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:58:41,497 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_strcmp_ground.i[815,828] [2022-01-31 17:58:41,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:58:41,520 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:58:41,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:41 WrapperNode [2022-01-31 17:58:41,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:58:41,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:58:41,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:58:41,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:58:41,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:41" (1/1) ... [2022-01-31 17:58:41,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:41" (1/1) ... [2022-01-31 17:58:41,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:41" (1/1) ... [2022-01-31 17:58:41,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:41" (1/1) ... [2022-01-31 17:58:41,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:41" (1/1) ... [2022-01-31 17:58:41,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:41" (1/1) ... [2022-01-31 17:58:41,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:41" (1/1) ... [2022-01-31 17:58:41,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:58:41,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:58:41,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:58:41,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:58:41,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:41" (1/1) ... [2022-01-31 17:58:41,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:58:41,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:58:41,593 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 17:58:41,611 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 17:58:41,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:58:41,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:58:41,630 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:58:41,630 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:58:41,630 INFO L138 BoogieDeclarations]: Found implementation of procedure _strcmp [2022-01-31 17:58:41,630 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:58:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:58:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:58:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:58:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:58:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:58:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:58:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:58:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 17:58:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure _strcmp [2022-01-31 17:58:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:58:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:58:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:58:41,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:58:41,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:58:41,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:58:41,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:58:41,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:58:41,697 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:58:41,699 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:58:41,839 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:58:41,843 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:58:41,843 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 17:58:41,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:58:41 BoogieIcfgContainer [2022-01-31 17:58:41,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:58:41,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:58:41,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:58:41,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:58:41,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:58:41" (1/3) ... [2022-01-31 17:58:41,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17414b37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:58:41, skipping insertion in model container [2022-01-31 17:58:41,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:58:41" (2/3) ... [2022-01-31 17:58:41,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17414b37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:58:41, skipping insertion in model container [2022-01-31 17:58:41,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:58:41" (3/3) ... [2022-01-31 17:58:41,850 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_strcmp_ground.i [2022-01-31 17:58:41,854 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:58:41,854 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:58:41,890 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:58:41,896 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 17:58:41,896 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:58:41,908 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 17:58:41,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 17:58:41,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:41,920 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] [2022-01-31 17:58:41,921 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:41,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:41,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1346377128, now seen corresponding path program 1 times [2022-01-31 17:58:41,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:41,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586702870] [2022-01-31 17:58:41,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:41,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:41,968 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 17:58:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:42,104 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:42,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586702870] [2022-01-31 17:58:42,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1586702870] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:42,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:42,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:58:42,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603638632] [2022-01-31 17:58:42,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:42,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:58:42,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:42,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:58:42,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:58:42,129 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:42,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:42,184 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2022-01-31 17:58:42,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:58:42,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-01-31 17:58:42,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:42,190 INFO L225 Difference]: With dead ends: 56 [2022-01-31 17:58:42,191 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 17:58:42,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 17:58:42,198 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 25 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:42,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:42,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 17:58:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-31 17:58:42,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-01-31 17:58:42,228 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 20 [2022-01-31 17:58:42,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:42,228 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-01-31 17:58:42,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:42,229 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-01-31 17:58:42,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 17:58:42,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:42,230 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] [2022-01-31 17:58:42,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:58:42,231 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:42,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:42,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1686974622, now seen corresponding path program 1 times [2022-01-31 17:58:42,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:42,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394753733] [2022-01-31 17:58:42,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:42,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:42,244 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 17:58:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:42,324 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:42,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394753733] [2022-01-31 17:58:42,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1394753733] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:42,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:42,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:58:42,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534128370] [2022-01-31 17:58:42,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:42,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:58:42,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:42,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:58:42,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:58:42,329 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:42,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:42,399 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-01-31 17:58:42,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:58:42,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-01-31 17:58:42,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:42,400 INFO L225 Difference]: With dead ends: 48 [2022-01-31 17:58:42,400 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 17:58:42,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 17:58:42,401 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:42,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 33 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:42,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 17:58:42,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-01-31 17:58:42,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:42,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-01-31 17:58:42,407 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2022-01-31 17:58:42,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:42,407 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-01-31 17:58:42,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:42,407 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-01-31 17:58:42,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 17:58:42,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:42,408 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] [2022-01-31 17:58:42,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:58:42,408 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:42,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:42,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2054293184, now seen corresponding path program 1 times [2022-01-31 17:58:42,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:42,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491767091] [2022-01-31 17:58:42,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:42,420 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:42,421 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:42,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:42,422 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 17:58:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:42,478 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:42,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491767091] [2022-01-31 17:58:42,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [491767091] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:42,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:42,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:58:42,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575435619] [2022-01-31 17:58:42,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:42,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:58:42,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:42,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:58:42,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:58:42,479 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:42,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:42,544 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-01-31 17:58:42,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:58:42,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-01-31 17:58:42,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:42,545 INFO L225 Difference]: With dead ends: 50 [2022-01-31 17:58:42,545 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 17:58:42,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 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 17:58:42,546 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 25 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:42,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 33 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:42,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 17:58:42,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-01-31 17:58:42,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:42,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-01-31 17:58:42,551 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2022-01-31 17:58:42,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:42,551 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-01-31 17:58:42,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:42,551 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-01-31 17:58:42,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 17:58:42,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:42,552 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:42,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:58:42,552 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:42,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:42,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1434854302, now seen corresponding path program 2 times [2022-01-31 17:58:42,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:42,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126371435] [2022-01-31 17:58:42,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:42,556 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:42,556 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:42,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:42,558 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 17:58:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:42,610 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:42,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126371435] [2022-01-31 17:58:42,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2126371435] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:42,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:42,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:58:42,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488683972] [2022-01-31 17:58:42,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:42,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:58:42,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:42,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:58:42,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:58:42,612 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:58:42,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:42,669 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2022-01-31 17:58:42,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:58:42,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-01-31 17:58:42,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:42,671 INFO L225 Difference]: With dead ends: 49 [2022-01-31 17:58:42,672 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 17:58:42,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 17:58:42,673 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:42,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:42,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 17:58:42,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2022-01-31 17:58:42,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:42,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-01-31 17:58:42,679 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 24 [2022-01-31 17:58:42,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:42,679 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-01-31 17:58:42,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:58:42,679 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-01-31 17:58:42,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 17:58:42,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:42,680 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:42,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:58:42,680 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:42,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:42,681 INFO L85 PathProgramCache]: Analyzing trace with hash 248777801, now seen corresponding path program 1 times [2022-01-31 17:58:42,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:42,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524282633] [2022-01-31 17:58:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:42,684 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:42,684 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:42,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:42,694 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 17:58:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:42,782 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:42,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524282633] [2022-01-31 17:58:42,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1524282633] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:42,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:42,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:58:42,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371398665] [2022-01-31 17:58:42,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:42,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:58:42,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:42,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:58:42,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:58:42,783 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:58:42,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:42,883 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-01-31 17:58:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:58:42,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-01-31 17:58:42,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:42,886 INFO L225 Difference]: With dead ends: 45 [2022-01-31 17:58:42,886 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 17:58:42,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:58:42,890 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:42,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 44 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:42,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 17:58:42,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-01-31 17:58:42,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:42,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-01-31 17:58:42,895 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2022-01-31 17:58:42,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:42,895 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-01-31 17:58:42,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:58:42,895 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-01-31 17:58:42,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 17:58:42,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:42,896 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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 17:58:42,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:58:42,896 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:42,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:42,896 INFO L85 PathProgramCache]: Analyzing trace with hash -202940354, now seen corresponding path program 1 times [2022-01-31 17:58:42,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:42,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745916862] [2022-01-31 17:58:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:42,899 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:42,899 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:42,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:42,900 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 17:58:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:42,979 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:42,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745916862] [2022-01-31 17:58:42,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [745916862] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:42,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:42,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:58:42,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369579053] [2022-01-31 17:58:42,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:42,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:58:42,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:42,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:58:42,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:58:42,983 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:58:43,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:43,044 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-01-31 17:58:43,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:58:43,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-01-31 17:58:43,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:43,045 INFO L225 Difference]: With dead ends: 49 [2022-01-31 17:58:43,045 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 17:58:43,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:58:43,046 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:43,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 32 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:43,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 17:58:43,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-01-31 17:58:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:43,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-01-31 17:58:43,055 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2022-01-31 17:58:43,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:43,055 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-01-31 17:58:43,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 17:58:43,055 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-01-31 17:58:43,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 17:58:43,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:43,056 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:43,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:58:43,056 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:43,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:43,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1744610022, now seen corresponding path program 2 times [2022-01-31 17:58:43,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:43,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249652486] [2022-01-31 17:58:43,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:43,059 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:43,059 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:43,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:43,060 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:43,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:43,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:43,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 17:58:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:43,113 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:43,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249652486] [2022-01-31 17:58:43,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1249652486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:43,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:43,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:58:43,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759438564] [2022-01-31 17:58:43,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:43,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:58:43,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:43,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:58:43,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:58:43,114 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:43,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:43,171 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-01-31 17:58:43,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:58:43,172 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-01-31 17:58:43,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:43,173 INFO L225 Difference]: With dead ends: 58 [2022-01-31 17:58:43,173 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 17:58:43,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 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 17:58:43,175 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:43,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 32 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:43,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 17:58:43,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-01-31 17:58:43,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:43,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-01-31 17:58:43,181 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2022-01-31 17:58:43,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:43,181 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-01-31 17:58:43,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:43,182 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-01-31 17:58:43,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 17:58:43,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:43,182 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:43,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:58:43,183 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:43,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:43,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1875439932, now seen corresponding path program 3 times [2022-01-31 17:58:43,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:43,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686801916] [2022-01-31 17:58:43,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:43,189 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:43,189 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:43,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:43,190 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:43,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:43,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 17:58:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:43,263 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:43,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686801916] [2022-01-31 17:58:43,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [686801916] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:43,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:43,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:58:43,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904293916] [2022-01-31 17:58:43,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:43,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:58:43,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:43,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:58:43,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:58:43,279 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:43,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:43,353 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-01-31 17:58:43,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:58:43,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-01-31 17:58:43,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:43,356 INFO L225 Difference]: With dead ends: 60 [2022-01-31 17:58:43,356 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 17:58:43,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 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 17:58:43,357 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:43,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 37 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:43,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 17:58:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-01-31 17:58:43,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-01-31 17:58:43,372 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2022-01-31 17:58:43,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:43,374 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-01-31 17:58:43,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:43,374 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-01-31 17:58:43,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 17:58:43,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:43,377 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:43,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:58:43,377 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:43,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:43,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1819935966, now seen corresponding path program 4 times [2022-01-31 17:58:43,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:43,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806419954] [2022-01-31 17:58:43,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:43,381 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:43,382 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:43,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:43,383 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:43,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:43,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:43,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:43,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 17:58:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:43,451 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:43,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806419954] [2022-01-31 17:58:43,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [806419954] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:43,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:43,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:58:43,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139017500] [2022-01-31 17:58:43,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:43,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:58:43,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:43,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:58:43,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:58:43,452 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:43,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:43,525 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2022-01-31 17:58:43,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:58:43,526 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2022-01-31 17:58:43,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:43,527 INFO L225 Difference]: With dead ends: 62 [2022-01-31 17:58:43,527 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 17:58:43,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:58:43,529 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:43,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 32 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:43,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 17:58:43,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-01-31 17:58:43,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:43,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-01-31 17:58:43,542 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 32 [2022-01-31 17:58:43,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:43,543 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-01-31 17:58:43,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:43,543 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-01-31 17:58:43,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 17:58:43,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:43,547 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:43,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:58:43,547 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:43,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:43,547 INFO L85 PathProgramCache]: Analyzing trace with hash 20232192, now seen corresponding path program 5 times [2022-01-31 17:58:43,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:43,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879070153] [2022-01-31 17:58:43,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:43,552 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:43,552 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:43,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:43,554 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:43,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:43,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 17:58:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:43,648 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:43,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879070153] [2022-01-31 17:58:43,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [879070153] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:43,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:43,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:58:43,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507935741] [2022-01-31 17:58:43,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:43,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:58:43,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:43,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:58:43,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:58:43,650 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:43,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:43,761 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2022-01-31 17:58:43,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:58:43,762 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-01-31 17:58:43,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:43,762 INFO L225 Difference]: With dead ends: 64 [2022-01-31 17:58:43,763 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 17:58:43,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 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 17:58:43,764 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:43,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 42 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:43,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 17:58:43,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-01-31 17:58:43,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:43,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-01-31 17:58:43,773 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 34 [2022-01-31 17:58:43,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:43,773 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-01-31 17:58:43,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:43,773 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-01-31 17:58:43,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 17:58:43,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:43,774 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:43,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:58:43,774 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:43,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:43,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1376725666, now seen corresponding path program 6 times [2022-01-31 17:58:43,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:43,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663246416] [2022-01-31 17:58:43,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:43,777 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:43,777 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:43,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:43,779 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:43,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:43,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:43,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 17:58:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:43,857 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 17:58:43,857 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:43,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663246416] [2022-01-31 17:58:43,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [663246416] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:43,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:43,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:58:43,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957957929] [2022-01-31 17:58:43,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:43,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:58:43,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:43,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:58:43,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:58:43,859 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:43,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:43,953 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2022-01-31 17:58:43,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:58:43,953 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-01-31 17:58:43,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:43,954 INFO L225 Difference]: With dead ends: 66 [2022-01-31 17:58:43,954 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 17:58:43,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 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 17:58:43,955 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:43,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 42 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:43,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 17:58:43,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-01-31 17:58:43,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:43,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-01-31 17:58:43,959 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 36 [2022-01-31 17:58:43,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:43,960 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-01-31 17:58:43,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:43,960 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-01-31 17:58:43,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 17:58:43,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:43,960 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:43,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:58:43,961 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:43,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:43,961 INFO L85 PathProgramCache]: Analyzing trace with hash -703103804, now seen corresponding path program 7 times [2022-01-31 17:58:43,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:43,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422629141] [2022-01-31 17:58:43,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:43,963 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:43,963 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:43,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:43,964 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:44,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:44,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 17:58:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:44,040 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 17:58:44,041 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:44,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422629141] [2022-01-31 17:58:44,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1422629141] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:44,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:44,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:58:44,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014040553] [2022-01-31 17:58:44,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:44,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:58:44,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:44,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:58:44,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:58:44,043 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:44,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:44,138 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2022-01-31 17:58:44,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:58:44,138 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2022-01-31 17:58:44,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:44,139 INFO L225 Difference]: With dead ends: 68 [2022-01-31 17:58:44,139 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 17:58:44,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 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 17:58:44,140 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 36 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:44,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 42 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:44,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 17:58:44,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-01-31 17:58:44,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:44,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-01-31 17:58:44,143 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 38 [2022-01-31 17:58:44,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:44,144 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-01-31 17:58:44,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:44,144 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-01-31 17:58:44,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 17:58:44,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:44,144 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:44,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:58:44,144 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:44,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:44,145 INFO L85 PathProgramCache]: Analyzing trace with hash 2035535462, now seen corresponding path program 8 times [2022-01-31 17:58:44,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:44,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858731917] [2022-01-31 17:58:44,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:44,146 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:44,146 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:44,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:44,147 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:44,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:44,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 17:58:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:44,221 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:44,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858731917] [2022-01-31 17:58:44,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [858731917] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:44,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:44,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:58:44,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707614949] [2022-01-31 17:58:44,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:44,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:58:44,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:44,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:58:44,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:58:44,222 INFO L87 Difference]: Start difference. First operand 45 states and 47 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:44,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:44,369 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-01-31 17:58:44,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:58:44,370 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2022-01-31 17:58:44,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:44,370 INFO L225 Difference]: With dead ends: 70 [2022-01-31 17:58:44,370 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 17:58:44,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 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 17:58:44,373 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 38 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:44,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 57 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:44,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 17:58:44,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-01-31 17:58:44,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:44,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-01-31 17:58:44,378 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 40 [2022-01-31 17:58:44,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:44,379 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-01-31 17:58:44,379 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:44,379 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-01-31 17:58:44,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 17:58:44,379 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:44,380 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:44,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:58:44,380 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:44,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:44,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1052917640, now seen corresponding path program 9 times [2022-01-31 17:58:44,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:44,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714143617] [2022-01-31 17:58:44,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:44,383 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:44,383 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:44,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:44,384 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:44,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:44,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 17:58:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:44,482 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:44,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714143617] [2022-01-31 17:58:44,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1714143617] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:44,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:44,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:58:44,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017970615] [2022-01-31 17:58:44,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:44,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:58:44,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:44,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:58:44,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:58:44,484 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:44,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:44,617 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2022-01-31 17:58:44,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:58:44,617 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2022-01-31 17:58:44,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:44,617 INFO L225 Difference]: With dead ends: 72 [2022-01-31 17:58:44,618 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 17:58:44,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 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 17:58:44,618 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:44,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 42 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:44,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 17:58:44,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-31 17:58:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:44,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-01-31 17:58:44,632 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 42 [2022-01-31 17:58:44,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:44,632 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-01-31 17:58:44,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:44,632 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-01-31 17:58:44,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 17:58:44,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:44,633 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:44,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:58:44,633 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:44,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:44,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1649995818, now seen corresponding path program 10 times [2022-01-31 17:58:44,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:44,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758357350] [2022-01-31 17:58:44,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:44,635 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:44,635 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:44,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:44,636 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:44,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:44,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:44,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 17:58:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:44,749 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:44,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758357350] [2022-01-31 17:58:44,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [758357350] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:44,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:44,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:58:44,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84416587] [2022-01-31 17:58:44,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:44,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:58:44,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:44,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:58:44,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:58:44,750 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:44,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:44,899 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2022-01-31 17:58:44,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:58:44,899 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-01-31 17:58:44,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:44,899 INFO L225 Difference]: With dead ends: 74 [2022-01-31 17:58:44,900 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 17:58:44,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 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 17:58:44,900 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:44,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 52 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:44,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 17:58:44,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-01-31 17:58:44,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:44,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-01-31 17:58:44,904 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 44 [2022-01-31 17:58:44,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:44,904 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-01-31 17:58:44,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:44,905 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-01-31 17:58:44,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 17:58:44,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:44,905 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:44,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:58:44,905 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:44,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:44,905 INFO L85 PathProgramCache]: Analyzing trace with hash -83492788, now seen corresponding path program 11 times [2022-01-31 17:58:44,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:44,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4422962] [2022-01-31 17:58:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:44,907 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:44,907 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:44,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:44,908 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:45,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:45,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 17:58:45,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:45,008 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:45,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4422962] [2022-01-31 17:58:45,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [4422962] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:45,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:45,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:58:45,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848406711] [2022-01-31 17:58:45,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:45,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:58:45,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:45,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:58:45,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:58:45,009 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:45,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:45,152 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-01-31 17:58:45,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:58:45,153 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-01-31 17:58:45,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:45,153 INFO L225 Difference]: With dead ends: 76 [2022-01-31 17:58:45,153 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 17:58:45,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:58:45,154 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:45,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 42 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:58:45,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 17:58:45,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-01-31 17:58:45,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:45,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-01-31 17:58:45,159 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 46 [2022-01-31 17:58:45,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:45,159 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-01-31 17:58:45,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:45,159 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-01-31 17:58:45,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 17:58:45,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:45,160 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:45,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:58:45,160 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:45,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:45,160 INFO L85 PathProgramCache]: Analyzing trace with hash 481267694, now seen corresponding path program 12 times [2022-01-31 17:58:45,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:45,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143114170] [2022-01-31 17:58:45,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:45,163 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:45,163 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:45,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:45,165 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:45,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:45,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 17:58:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:45,291 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 17:58:45,291 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:45,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143114170] [2022-01-31 17:58:45,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [143114170] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:45,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:45,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:58:45,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166914251] [2022-01-31 17:58:45,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:45,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:58:45,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:45,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:58:45,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:58:45,292 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:45,475 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2022-01-31 17:58:45,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:58:45,476 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2022-01-31 17:58:45,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:45,476 INFO L225 Difference]: With dead ends: 78 [2022-01-31 17:58:45,476 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 17:58:45,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 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 17:58:45,477 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:45,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 42 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:45,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 17:58:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-01-31 17:58:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:45,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2022-01-31 17:58:45,482 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 48 [2022-01-31 17:58:45,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:45,482 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2022-01-31 17:58:45,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:45,482 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2022-01-31 17:58:45,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 17:58:45,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:45,483 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:45,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:58:45,483 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:45,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:45,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2050211600, now seen corresponding path program 13 times [2022-01-31 17:58:45,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:45,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025514141] [2022-01-31 17:58:45,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:45,486 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:45,486 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:45,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:45,488 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:45,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:45,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 17:58:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:45,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:45,624 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:45,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025514141] [2022-01-31 17:58:45,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1025514141] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:45,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:45,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:58:45,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040123888] [2022-01-31 17:58:45,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:45,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:58:45,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:45,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:58:45,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:58:45,625 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:45,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:45,850 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2022-01-31 17:58:45,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:58:45,850 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-01-31 17:58:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:45,852 INFO L225 Difference]: With dead ends: 80 [2022-01-31 17:58:45,852 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 17:58:45,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 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 17:58:45,853 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 48 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:45,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 47 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:45,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 17:58:45,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-01-31 17:58:45,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:45,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-01-31 17:58:45,858 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 50 [2022-01-31 17:58:45,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:45,859 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-01-31 17:58:45,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:45,859 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-01-31 17:58:45,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 17:58:45,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:45,860 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:45,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:58:45,860 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:45,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:45,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2023182926, now seen corresponding path program 14 times [2022-01-31 17:58:45,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:45,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121091563] [2022-01-31 17:58:45,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:45,863 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:45,863 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:45,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:45,864 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:46,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:46,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:46,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 17:58:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:46,046 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:46,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121091563] [2022-01-31 17:58:46,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [121091563] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:46,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:46,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:58:46,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692996919] [2022-01-31 17:58:46,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:46,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:58:46,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:46,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:58:46,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:58:46,048 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:46,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:46,265 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2022-01-31 17:58:46,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:58:46,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-01-31 17:58:46,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:46,266 INFO L225 Difference]: With dead ends: 82 [2022-01-31 17:58:46,266 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 17:58:46,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 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 17:58:46,267 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 50 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:46,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 42 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:46,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 17:58:46,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-01-31 17:58:46,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:46,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2022-01-31 17:58:46,272 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 52 [2022-01-31 17:58:46,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:46,272 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2022-01-31 17:58:46,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:46,272 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2022-01-31 17:58:46,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 17:58:46,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:46,273 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:46,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:58:46,273 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:46,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:46,273 INFO L85 PathProgramCache]: Analyzing trace with hash 454851540, now seen corresponding path program 15 times [2022-01-31 17:58:46,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:46,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781560599] [2022-01-31 17:58:46,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:46,275 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:46,275 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:46,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:46,277 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:46,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:46,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 17:58:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:46,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:46,425 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:46,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781560599] [2022-01-31 17:58:46,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1781560599] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:46,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:46,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:58:46,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932496061] [2022-01-31 17:58:46,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:46,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:58:46,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:46,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:58:46,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:58:46,426 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:46,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:46,634 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2022-01-31 17:58:46,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:58:46,634 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-01-31 17:58:46,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:46,634 INFO L225 Difference]: With dead ends: 84 [2022-01-31 17:58:46,634 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 17:58:46,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:58:46,635 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 52 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:46,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 37 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:46,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 17:58:46,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-01-31 17:58:46,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-01-31 17:58:46,642 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 54 [2022-01-31 17:58:46,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:46,642 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-01-31 17:58:46,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:46,642 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-01-31 17:58:46,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 17:58:46,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:46,643 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:46,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:58:46,643 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:46,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:46,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1860875914, now seen corresponding path program 16 times [2022-01-31 17:58:46,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:46,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136568939] [2022-01-31 17:58:46,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:46,645 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:46,646 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:46,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:46,647 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:46,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:46,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 17:58:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:46,811 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:46,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136568939] [2022-01-31 17:58:46,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2136568939] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:46,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:46,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:58:46,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898778202] [2022-01-31 17:58:46,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:46,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:58:46,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:46,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:58:46,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:58:46,813 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:47,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:47,045 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2022-01-31 17:58:47,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:58:47,046 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-01-31 17:58:47,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:47,046 INFO L225 Difference]: With dead ends: 86 [2022-01-31 17:58:47,046 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 17:58:47,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 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 17:58:47,047 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:47,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 47 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:47,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 17:58:47,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-01-31 17:58:47,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:47,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2022-01-31 17:58:47,053 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 56 [2022-01-31 17:58:47,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:47,054 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2022-01-31 17:58:47,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:47,054 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2022-01-31 17:58:47,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 17:58:47,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:47,056 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:47,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:58:47,056 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:47,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:47,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1813067416, now seen corresponding path program 17 times [2022-01-31 17:58:47,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:47,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939920690] [2022-01-31 17:58:47,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:47,059 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:47,059 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:47,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:47,060 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:47,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:47,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 17:58:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:47,253 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:47,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939920690] [2022-01-31 17:58:47,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1939920690] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:47,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:47,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:58:47,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448702477] [2022-01-31 17:58:47,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:47,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:58:47,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:47,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:58:47,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:58:47,254 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:47,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:47,544 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2022-01-31 17:58:47,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:58:47,546 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-01-31 17:58:47,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:47,547 INFO L225 Difference]: With dead ends: 88 [2022-01-31 17:58:47,547 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 17:58:47,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 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 17:58:47,548 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:47,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 52 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:47,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 17:58:47,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-01-31 17:58:47,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:47,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-01-31 17:58:47,553 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 58 [2022-01-31 17:58:47,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:47,553 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-01-31 17:58:47,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:47,553 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-01-31 17:58:47,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 17:58:47,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:47,553 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:47,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:58:47,553 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:47,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:47,554 INFO L85 PathProgramCache]: Analyzing trace with hash 2009490234, now seen corresponding path program 18 times [2022-01-31 17:58:47,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:47,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548296530] [2022-01-31 17:58:47,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:47,555 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:47,555 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:47,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:47,557 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:47,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:47,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 17:58:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:47,733 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:47,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548296530] [2022-01-31 17:58:47,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1548296530] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:47,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:47,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:58:47,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234245075] [2022-01-31 17:58:47,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:47,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:58:47,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:47,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:58:47,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:58:47,735 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:48,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:48,013 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2022-01-31 17:58:48,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:58:48,013 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-01-31 17:58:48,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:48,013 INFO L225 Difference]: With dead ends: 90 [2022-01-31 17:58:48,014 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 17:58:48,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 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 17:58:48,014 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:48,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 52 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:48,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 17:58:48,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-01-31 17:58:48,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:48,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-01-31 17:58:48,020 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 60 [2022-01-31 17:58:48,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:48,020 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-01-31 17:58:48,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:48,020 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-01-31 17:58:48,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 17:58:48,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:48,020 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:48,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:58:48,021 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:48,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:48,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1793257308, now seen corresponding path program 19 times [2022-01-31 17:58:48,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:48,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976511210] [2022-01-31 17:58:48,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:48,022 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:48,022 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:48,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:48,024 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:48,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:48,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 17:58:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:48,218 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:48,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976511210] [2022-01-31 17:58:48,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [976511210] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:48,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:48,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:58:48,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602992828] [2022-01-31 17:58:48,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:48,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:58:48,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:48,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:58:48,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:58:48,219 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:48,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:48,523 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2022-01-31 17:58:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:58:48,523 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-01-31 17:58:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:48,524 INFO L225 Difference]: With dead ends: 92 [2022-01-31 17:58:48,524 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 17:58:48,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 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 17:58:48,525 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:48,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 57 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:48,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 17:58:48,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-01-31 17:58:48,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-01-31 17:58:48,530 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 62 [2022-01-31 17:58:48,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:48,531 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-01-31 17:58:48,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:48,531 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-01-31 17:58:48,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 17:58:48,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:48,531 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:48,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:58:48,531 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:48,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:48,532 INFO L85 PathProgramCache]: Analyzing trace with hash 151845630, now seen corresponding path program 20 times [2022-01-31 17:58:48,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:48,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417457822] [2022-01-31 17:58:48,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:48,533 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:48,533 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:48,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:48,535 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:48,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:48,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 17:58:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:48,753 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:48,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417457822] [2022-01-31 17:58:48,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1417457822] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:48,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:48,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:58:48,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980035771] [2022-01-31 17:58:48,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:48,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:58:48,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:48,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:58:48,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:58:48,755 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:49,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:49,086 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2022-01-31 17:58:49,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:58:49,086 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-01-31 17:58:49,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:49,087 INFO L225 Difference]: With dead ends: 94 [2022-01-31 17:58:49,087 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 17:58:49,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 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 17:58:49,088 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 62 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:49,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 42 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:49,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 17:58:49,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-01-31 17:58:49,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:49,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2022-01-31 17:58:49,095 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 64 [2022-01-31 17:58:49,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:49,096 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2022-01-31 17:58:49,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:49,096 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2022-01-31 17:58:49,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 17:58:49,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:49,096 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:49,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:58:49,097 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:49,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:49,097 INFO L85 PathProgramCache]: Analyzing trace with hash -991779296, now seen corresponding path program 21 times [2022-01-31 17:58:49,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:49,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776843147] [2022-01-31 17:58:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:49,099 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:49,099 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:49,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:49,100 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:49,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:49,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 17:58:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:49,346 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 17:58:49,346 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:49,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776843147] [2022-01-31 17:58:49,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1776843147] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:49,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:49,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:58:49,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250411829] [2022-01-31 17:58:49,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:49,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:58:49,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:49,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:58:49,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:58:49,347 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:49,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:49,672 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2022-01-31 17:58:49,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:58:49,672 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-01-31 17:58:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:49,672 INFO L225 Difference]: With dead ends: 96 [2022-01-31 17:58:49,672 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 17:58:49,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 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 17:58:49,673 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 64 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:49,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 47 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:49,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 17:58:49,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-01-31 17:58:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:49,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-01-31 17:58:49,680 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 66 [2022-01-31 17:58:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:49,680 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-01-31 17:58:49,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:49,680 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-01-31 17:58:49,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 17:58:49,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:49,681 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:49,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:58:49,681 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:49,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:49,681 INFO L85 PathProgramCache]: Analyzing trace with hash -503705406, now seen corresponding path program 22 times [2022-01-31 17:58:49,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:49,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631268047] [2022-01-31 17:58:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:49,683 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:49,684 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:49,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:49,687 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:49,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:49,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 17:58:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:49,940 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:49,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631268047] [2022-01-31 17:58:49,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1631268047] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:49,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:49,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:58:49,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996600930] [2022-01-31 17:58:49,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:49,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:58:49,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:49,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:58:49,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:58:49,943 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:50,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:50,284 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2022-01-31 17:58:50,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:58:50,284 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2022-01-31 17:58:50,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:50,285 INFO L225 Difference]: With dead ends: 98 [2022-01-31 17:58:50,285 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 17:58:50,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 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 17:58:50,286 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 66 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:50,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 47 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:50,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 17:58:50,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-01-31 17:58:50,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:50,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2022-01-31 17:58:50,293 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 68 [2022-01-31 17:58:50,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:50,293 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2022-01-31 17:58:50,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:50,293 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2022-01-31 17:58:50,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 17:58:50,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:50,294 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:50,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:58:50,294 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:50,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:50,294 INFO L85 PathProgramCache]: Analyzing trace with hash 383867620, now seen corresponding path program 23 times [2022-01-31 17:58:50,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:50,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185147179] [2022-01-31 17:58:50,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:50,296 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:50,296 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:50,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:50,298 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:50,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:50,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 17:58:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:50,572 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:50,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185147179] [2022-01-31 17:58:50,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [185147179] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:50,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:50,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:58:50,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248601117] [2022-01-31 17:58:50,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:50,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:58:50,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:50,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:58:50,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:58:50,573 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:50,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:50,967 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-01-31 17:58:50,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:58:50,967 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-01-31 17:58:50,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:50,970 INFO L225 Difference]: With dead ends: 100 [2022-01-31 17:58:50,970 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 17:58:50,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:58:50,971 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 68 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:50,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 67 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:50,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 17:58:50,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-01-31 17:58:50,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:50,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-01-31 17:58:50,977 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 70 [2022-01-31 17:58:50,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:50,977 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-01-31 17:58:50,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:50,977 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-01-31 17:58:50,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 17:58:50,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:50,978 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:50,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:58:50,978 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:50,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:50,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1356946298, now seen corresponding path program 24 times [2022-01-31 17:58:50,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:50,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130791918] [2022-01-31 17:58:50,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:50,980 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:50,980 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:50,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:50,982 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:51,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:51,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 17:58:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:51,264 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 17:58:51,264 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:51,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130791918] [2022-01-31 17:58:51,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [130791918] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:51,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:51,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:58:51,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96704488] [2022-01-31 17:58:51,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:51,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:58:51,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:51,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:58:51,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:58:51,265 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:51,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:51,642 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2022-01-31 17:58:51,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:58:51,643 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-01-31 17:58:51,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:51,643 INFO L225 Difference]: With dead ends: 102 [2022-01-31 17:58:51,643 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 17:58:51,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 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 17:58:51,644 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 70 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:51,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 42 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:51,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 17:58:51,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-01-31 17:58:51,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:51,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2022-01-31 17:58:51,652 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 72 [2022-01-31 17:58:51,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:51,652 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2022-01-31 17:58:51,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:51,652 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2022-01-31 17:58:51,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 17:58:51,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:51,653 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:51,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:58:51,653 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:51,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:51,653 INFO L85 PathProgramCache]: Analyzing trace with hash 758123944, now seen corresponding path program 25 times [2022-01-31 17:58:51,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:51,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053637749] [2022-01-31 17:58:51,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:51,656 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:51,656 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:51,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:51,658 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:51,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:51,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 17:58:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:51,976 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:51,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053637749] [2022-01-31 17:58:51,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1053637749] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:51,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:51,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:58:51,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318418641] [2022-01-31 17:58:51,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:51,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:58:51,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:51,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:58:51,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:58:51,977 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:52,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:52,441 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2022-01-31 17:58:52,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:58:52,442 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-01-31 17:58:52,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:52,442 INFO L225 Difference]: With dead ends: 104 [2022-01-31 17:58:52,442 INFO L226 Difference]: Without dead ends: 82 [2022-01-31 17:58:52,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 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 17:58:52,443 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 72 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:52,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 47 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:52,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-31 17:58:52,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-01-31 17:58:52,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:52,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2022-01-31 17:58:52,451 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 74 [2022-01-31 17:58:52,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:52,451 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2022-01-31 17:58:52,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:52,451 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2022-01-31 17:58:52,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 17:58:52,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:52,452 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:52,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:58:52,452 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:52,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:52,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1821095498, now seen corresponding path program 26 times [2022-01-31 17:58:52,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:52,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057285481] [2022-01-31 17:58:52,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:52,455 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:52,455 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:52,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:52,458 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:52,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:52,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 17:58:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:52,782 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:52,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057285481] [2022-01-31 17:58:52,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1057285481] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:52,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:52,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:58:52,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408141238] [2022-01-31 17:58:52,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:52,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:58:52,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:52,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:58:52,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:58:52,783 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:53,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:53,206 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2022-01-31 17:58:53,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:58:53,207 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-01-31 17:58:53,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:53,207 INFO L225 Difference]: With dead ends: 106 [2022-01-31 17:58:53,207 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 17:58:53,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:58:53,208 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 74 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:53,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 42 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:53,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 17:58:53,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-01-31 17:58:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2022-01-31 17:58:53,217 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 76 [2022-01-31 17:58:53,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:53,217 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2022-01-31 17:58:53,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:53,218 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2022-01-31 17:58:53,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 17:58:53,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:53,218 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:53,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:58:53,218 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:53,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:53,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1134542444, now seen corresponding path program 27 times [2022-01-31 17:58:53,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:53,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55663041] [2022-01-31 17:58:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:53,220 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:53,220 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:53,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:53,223 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:53,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:53,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 17:58:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:53,553 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:53,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55663041] [2022-01-31 17:58:53,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [55663041] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:53,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:53,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:58:53,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879327207] [2022-01-31 17:58:53,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:53,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:58:53,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:53,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:58:53,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:58:53,554 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:54,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:54,005 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2022-01-31 17:58:54,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:58:54,005 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 78 [2022-01-31 17:58:54,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:54,005 INFO L225 Difference]: With dead ends: 108 [2022-01-31 17:58:54,005 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 17:58:54,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:58:54,007 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 76 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:54,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 47 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:54,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 17:58:54,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-01-31 17:58:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2022-01-31 17:58:54,029 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 78 [2022-01-31 17:58:54,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:54,029 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2022-01-31 17:58:54,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:54,030 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2022-01-31 17:58:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 17:58:54,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:54,030 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:54,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:58:54,030 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:54,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:54,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1512946162, now seen corresponding path program 28 times [2022-01-31 17:58:54,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:54,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979599777] [2022-01-31 17:58:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:54,033 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:54,033 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:54,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:54,035 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:54,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:54,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 17:58:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:54,390 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:54,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979599777] [2022-01-31 17:58:54,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [979599777] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:54,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:54,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:58:54,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580807969] [2022-01-31 17:58:54,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:54,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:58:54,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:54,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:58:54,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:58:54,391 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:54,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:54,862 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2022-01-31 17:58:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:58:54,863 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 80 [2022-01-31 17:58:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:54,863 INFO L225 Difference]: With dead ends: 110 [2022-01-31 17:58:54,863 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 17:58:54,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:58:54,865 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 78 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:54,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 47 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 17:58:54,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-01-31 17:58:54,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:54,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2022-01-31 17:58:54,873 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 80 [2022-01-31 17:58:54,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:54,873 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2022-01-31 17:58:54,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:54,873 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2022-01-31 17:58:54,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 17:58:54,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:54,874 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:54,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:58:54,874 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:54,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:54,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1166110000, now seen corresponding path program 29 times [2022-01-31 17:58:54,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:54,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969632526] [2022-01-31 17:58:54,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:54,876 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:54,876 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:54,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:54,879 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:55,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:55,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-31 17:58:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:55,270 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 17:58:55,270 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:55,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969632526] [2022-01-31 17:58:55,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [969632526] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:55,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:55,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:58:55,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134798083] [2022-01-31 17:58:55,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:55,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:58:55,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:55,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:58:55,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:58:55,272 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:55,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:55,789 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2022-01-31 17:58:55,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:58:55,790 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-01-31 17:58:55,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:55,790 INFO L225 Difference]: With dead ends: 112 [2022-01-31 17:58:55,790 INFO L226 Difference]: Without dead ends: 90 [2022-01-31 17:58:55,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:58:55,791 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 80 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:55,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 57 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:55,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-31 17:58:55,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-01-31 17:58:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:55,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2022-01-31 17:58:55,799 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 82 [2022-01-31 17:58:55,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:55,799 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2022-01-31 17:58:55,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:55,800 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2022-01-31 17:58:55,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 17:58:55,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:55,800 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:55,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:58:55,800 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:55,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:55,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1241295918, now seen corresponding path program 30 times [2022-01-31 17:58:55,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:55,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762524322] [2022-01-31 17:58:55,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:55,802 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:55,802 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:55,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:55,805 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:56,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:56,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:56,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 17:58:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:56,177 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:56,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762524322] [2022-01-31 17:58:56,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1762524322] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:56,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:56,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:58:56,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218785004] [2022-01-31 17:58:56,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:56,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:58:56,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:56,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:58:56,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:58:56,179 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:56,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:56,671 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2022-01-31 17:58:56,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:58:56,671 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 84 [2022-01-31 17:58:56,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:56,672 INFO L225 Difference]: With dead ends: 114 [2022-01-31 17:58:56,672 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 17:58:56,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 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 17:58:56,674 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 82 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:56,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 42 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:56,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 17:58:56,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-01-31 17:58:56,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2022-01-31 17:58:56,683 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 84 [2022-01-31 17:58:56,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:56,683 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2022-01-31 17:58:56,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:56,683 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2022-01-31 17:58:56,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 17:58:56,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:56,683 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:56,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:58:56,684 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:56,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:56,684 INFO L85 PathProgramCache]: Analyzing trace with hash 228989428, now seen corresponding path program 31 times [2022-01-31 17:58:56,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:56,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166914380] [2022-01-31 17:58:56,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:56,686 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:56,686 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:56,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:56,688 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:57,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:57,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 17:58:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:57,109 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:57,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166914380] [2022-01-31 17:58:57,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [166914380] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:57,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:57,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:58:57,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447136812] [2022-01-31 17:58:57,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:57,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:58:57,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:57,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:58:57,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:58:57,112 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:57,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:57,700 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2022-01-31 17:58:57,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:58:57,701 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 86 [2022-01-31 17:58:57,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:57,701 INFO L225 Difference]: With dead ends: 116 [2022-01-31 17:58:57,701 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 17:58:57,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:58:57,702 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 84 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:57,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 52 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:57,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 17:58:57,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2022-01-31 17:58:57,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 85 states have (on average 1.035294117647059) internal successors, (88), 85 states have internal predecessors, (88), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:57,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-01-31 17:58:57,711 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 86 [2022-01-31 17:58:57,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:57,711 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-01-31 17:58:57,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:57,711 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-01-31 17:58:57,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 17:58:57,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:57,712 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:57,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:58:57,712 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:57,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:57,712 INFO L85 PathProgramCache]: Analyzing trace with hash 128966550, now seen corresponding path program 32 times [2022-01-31 17:58:57,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:57,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105977869] [2022-01-31 17:58:57,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:57,714 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:57,714 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:57,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:57,716 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:58,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:58,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 17:58:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:58,127 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 17:58:58,127 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:58,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105977869] [2022-01-31 17:58:58,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1105977869] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:58,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:58,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:58:58,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643607195] [2022-01-31 17:58:58,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:58,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:58:58,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:58,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:58:58,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:58:58,129 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:58,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:58,704 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2022-01-31 17:58:58,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:58:58,705 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 88 [2022-01-31 17:58:58,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:58,705 INFO L225 Difference]: With dead ends: 118 [2022-01-31 17:58:58,705 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 17:58:58,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:58:58,707 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 86 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:58,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 42 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:58,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 17:58:58,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-01-31 17:58:58,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 87 states have internal predecessors, (90), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:58,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2022-01-31 17:58:58,716 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 88 [2022-01-31 17:58:58,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:58,717 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2022-01-31 17:58:58,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2022-01-31 17:58:58,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 17:58:58,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:58,717 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:58,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:58:58,717 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:58,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:58,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1503738696, now seen corresponding path program 33 times [2022-01-31 17:58:58,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:58,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406378283] [2022-01-31 17:58:58,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:58,719 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:58,719 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:58,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:58,722 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:59,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:59,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-31 17:58:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:59,225 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:59,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406378283] [2022-01-31 17:58:59,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1406378283] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:59,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:59,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:58:59,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957545104] [2022-01-31 17:58:59,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:59,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:58:59,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:59,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:58:59,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:58:59,227 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:59,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:59,856 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2022-01-31 17:58:59,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:58:59,856 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 90 [2022-01-31 17:58:59,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:59,857 INFO L225 Difference]: With dead ends: 120 [2022-01-31 17:58:59,857 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 17:58:59,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:58:59,858 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 88 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:59,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 52 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:58:59,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 17:58:59,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-01-31 17:58:59,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:58:59,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2022-01-31 17:58:59,868 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 90 [2022-01-31 17:58:59,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:59,868 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2022-01-31 17:58:59,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:59,868 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2022-01-31 17:58:59,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 17:58:59,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:59,869 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:59,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:58:59,869 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:59,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:59,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1424550234, now seen corresponding path program 34 times [2022-01-31 17:58:59,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:59,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760757610] [2022-01-31 17:58:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:59,871 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:59,871 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:59,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:59,875 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:00,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:00,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-31 17:59:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:00,350 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:00,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760757610] [2022-01-31 17:59:00,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1760757610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:00,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:00,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:59:00,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893416870] [2022-01-31 17:59:00,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:00,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:59:00,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:00,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:59:00,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:59:00,352 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:00,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:00,967 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2022-01-31 17:59:00,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:59:00,967 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 92 [2022-01-31 17:59:00,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:00,967 INFO L225 Difference]: With dead ends: 122 [2022-01-31 17:59:00,967 INFO L226 Difference]: Without dead ends: 100 [2022-01-31 17:59:00,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:59:00,969 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 90 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:00,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 42 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:00,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-31 17:59:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-01-31 17:59:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 91 states have (on average 1.032967032967033) internal successors, (94), 91 states have internal predecessors, (94), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:00,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2022-01-31 17:59:00,979 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 92 [2022-01-31 17:59:00,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:00,980 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2022-01-31 17:59:00,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:00,980 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2022-01-31 17:59:00,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 17:59:00,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:00,980 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:00,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:59:00,980 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:00,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:00,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1988334212, now seen corresponding path program 35 times [2022-01-31 17:59:00,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:00,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481545837] [2022-01-31 17:59:00,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:00,982 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:00,982 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:00,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:00,985 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:01,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:01,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 17:59:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:01,495 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:01,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481545837] [2022-01-31 17:59:01,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [481545837] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:01,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:01,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:59:01,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386117422] [2022-01-31 17:59:01,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:01,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:59:01,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:01,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:59:01,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:59:01,497 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:02,160 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2022-01-31 17:59:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:59:02,160 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 94 [2022-01-31 17:59:02,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:02,161 INFO L225 Difference]: With dead ends: 124 [2022-01-31 17:59:02,161 INFO L226 Difference]: Without dead ends: 102 [2022-01-31 17:59:02,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:59:02,162 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 92 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:02,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 42 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:02,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-31 17:59:02,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2022-01-31 17:59:02,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 93 states have (on average 1.032258064516129) internal successors, (96), 93 states have internal predecessors, (96), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:02,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2022-01-31 17:59:02,173 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 94 [2022-01-31 17:59:02,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:02,173 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2022-01-31 17:59:02,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:02,173 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2022-01-31 17:59:02,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 17:59:02,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:02,174 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:02,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:59:02,174 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:02,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:02,174 INFO L85 PathProgramCache]: Analyzing trace with hash -415272674, now seen corresponding path program 36 times [2022-01-31 17:59:02,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:02,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081175981] [2022-01-31 17:59:02,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:02,176 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:02,176 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:02,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:02,179 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:02,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:02,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-01-31 17:59:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:02,682 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:02,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081175981] [2022-01-31 17:59:02,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1081175981] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:02,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:02,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:59:02,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026972523] [2022-01-31 17:59:02,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:02,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:59:02,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:02,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:59:02,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:59:02,686 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:03,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:03,425 INFO L93 Difference]: Finished difference Result 126 states and 130 transitions. [2022-01-31 17:59:03,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:59:03,425 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 96 [2022-01-31 17:59:03,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:03,426 INFO L225 Difference]: With dead ends: 126 [2022-01-31 17:59:03,426 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 17:59:03,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 5 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 17:59:03,427 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 94 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:03,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 57 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:59:03,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 17:59:03,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-01-31 17:59:03,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:03,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2022-01-31 17:59:03,438 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 96 [2022-01-31 17:59:03,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:03,438 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2022-01-31 17:59:03,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:03,438 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2022-01-31 17:59:03,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 17:59:03,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:03,444 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:03,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:59:03,444 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:03,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:03,444 INFO L85 PathProgramCache]: Analyzing trace with hash -531622848, now seen corresponding path program 37 times [2022-01-31 17:59:03,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:03,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79815579] [2022-01-31 17:59:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:03,446 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:03,446 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:03,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:03,452 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:03,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:03,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-31 17:59:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:03,974 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:03,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79815579] [2022-01-31 17:59:03,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [79815579] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:03,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:03,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:59:03,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608078599] [2022-01-31 17:59:03,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:03,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:59:03,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:03,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:59:03,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:59:03,975 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 40 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:04,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:04,705 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2022-01-31 17:59:04,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:59:04,706 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 40 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 98 [2022-01-31 17:59:04,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:04,707 INFO L225 Difference]: With dead ends: 128 [2022-01-31 17:59:04,707 INFO L226 Difference]: Without dead ends: 106 [2022-01-31 17:59:04,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 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 17:59:04,708 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 96 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:04,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 57 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:59:04,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-31 17:59:04,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2022-01-31 17:59:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 97 states have internal predecessors, (100), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:04,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2022-01-31 17:59:04,720 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 98 [2022-01-31 17:59:04,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:04,721 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2022-01-31 17:59:04,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 40 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:04,721 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2022-01-31 17:59:04,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 17:59:04,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:04,721 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:04,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:59:04,721 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:04,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:04,722 INFO L85 PathProgramCache]: Analyzing trace with hash -674990366, now seen corresponding path program 38 times [2022-01-31 17:59:04,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:04,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398891665] [2022-01-31 17:59:04,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:04,724 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:04,724 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:04,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:04,727 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:05,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:05,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-01-31 17:59:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:05,341 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:05,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398891665] [2022-01-31 17:59:05,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [398891665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:05,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:05,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:59:05,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042575835] [2022-01-31 17:59:05,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:05,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:59:05,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:05,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:59:05,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:59:05,344 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:06,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:06,020 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2022-01-31 17:59:06,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:59:06,020 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 100 [2022-01-31 17:59:06,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:06,021 INFO L225 Difference]: With dead ends: 130 [2022-01-31 17:59:06,021 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 17:59:06,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 5 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 17:59:06,022 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 98 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:06,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 37 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:06,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 17:59:06,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-01-31 17:59:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:06,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2022-01-31 17:59:06,038 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 100 [2022-01-31 17:59:06,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:06,038 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2022-01-31 17:59:06,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:06,038 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2022-01-31 17:59:06,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 17:59:06,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:06,039 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:06,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:59:06,039 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:06,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:06,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1012221692, now seen corresponding path program 39 times [2022-01-31 17:59:06,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:06,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628566906] [2022-01-31 17:59:06,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:06,041 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:06,041 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:06,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:06,044 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:06,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:06,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:06,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-31 17:59:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:06,654 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:06,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628566906] [2022-01-31 17:59:06,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1628566906] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:06,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:06,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:59:06,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292903726] [2022-01-31 17:59:06,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:06,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:59:06,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:06,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:59:06,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:59:06,656 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand has 43 states, 43 states have (on average 2.186046511627907) internal successors, (94), 42 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:07,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:07,422 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2022-01-31 17:59:07,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:59:07,422 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.186046511627907) internal successors, (94), 42 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 102 [2022-01-31 17:59:07,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:07,422 INFO L225 Difference]: With dead ends: 132 [2022-01-31 17:59:07,422 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 17:59:07,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:59:07,423 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 100 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:07,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 47 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 17:59:07,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-01-31 17:59:07,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 101 states have internal predecessors, (104), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2022-01-31 17:59:07,435 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 102 [2022-01-31 17:59:07,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:07,436 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2022-01-31 17:59:07,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.186046511627907) internal successors, (94), 42 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:07,436 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2022-01-31 17:59:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 17:59:07,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:07,436 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:07,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:59:07,436 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:07,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:07,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1325988518, now seen corresponding path program 40 times [2022-01-31 17:59:07,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:07,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314000834] [2022-01-31 17:59:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:07,438 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:07,438 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:07,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:07,442 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:08,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:08,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 17:59:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:08,039 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:08,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314000834] [2022-01-31 17:59:08,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1314000834] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:08,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:08,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:59:08,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820116543] [2022-01-31 17:59:08,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:08,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:59:08,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:08,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:59:08,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:59:08,041 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:08,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:08,820 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions. [2022-01-31 17:59:08,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:59:08,821 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 104 [2022-01-31 17:59:08,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:08,821 INFO L225 Difference]: With dead ends: 134 [2022-01-31 17:59:08,821 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 17:59:08,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 5 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 17:59:08,823 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 102 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:08,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 52 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:08,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 17:59:08,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-01-31 17:59:08,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 103 states have (on average 1.029126213592233) internal successors, (106), 103 states have internal predecessors, (106), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:08,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2022-01-31 17:59:08,836 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 104 [2022-01-31 17:59:08,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:08,836 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2022-01-31 17:59:08,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2022-01-31 17:59:08,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 17:59:08,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:08,837 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:08,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:59:08,837 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:08,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:08,837 INFO L85 PathProgramCache]: Analyzing trace with hash 2078104520, now seen corresponding path program 41 times [2022-01-31 17:59:08,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:08,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656425116] [2022-01-31 17:59:08,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:08,839 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:08,839 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:08,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:08,843 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:09,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:09,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-31 17:59:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:09,567 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:09,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656425116] [2022-01-31 17:59:09,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [656425116] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:09,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:09,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:59:09,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6911671] [2022-01-31 17:59:09,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:09,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:59:09,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:09,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:59:09,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:59:09,569 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 44 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:10,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:10,345 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2022-01-31 17:59:10,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:59:10,345 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 44 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 106 [2022-01-31 17:59:10,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:10,346 INFO L225 Difference]: With dead ends: 136 [2022-01-31 17:59:10,346 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 17:59:10,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 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 17:59:10,347 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 104 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:10,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 57 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:10,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 17:59:10,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2022-01-31 17:59:10,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 105 states have internal predecessors, (108), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2022-01-31 17:59:10,361 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 106 [2022-01-31 17:59:10,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:10,362 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2022-01-31 17:59:10,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 44 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:10,362 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2022-01-31 17:59:10,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 17:59:10,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:10,362 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:10,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:59:10,362 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:10,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:10,363 INFO L85 PathProgramCache]: Analyzing trace with hash -987890582, now seen corresponding path program 42 times [2022-01-31 17:59:10,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:10,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800781895] [2022-01-31 17:59:10,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:10,365 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:10,365 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:10,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:10,368 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:11,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:11,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-01-31 17:59:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:11,052 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:11,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800781895] [2022-01-31 17:59:11,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1800781895] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:11,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:11,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:59:11,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152096194] [2022-01-31 17:59:11,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:11,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:59:11,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:11,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:59:11,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:59:11,053 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:11,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:11,894 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2022-01-31 17:59:11,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:59:11,894 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 108 [2022-01-31 17:59:11,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:11,895 INFO L225 Difference]: With dead ends: 138 [2022-01-31 17:59:11,895 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 17:59:11,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:59:11,896 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 106 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:11,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 62 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:11,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 17:59:11,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-01-31 17:59:11,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:11,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2022-01-31 17:59:11,911 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 108 [2022-01-31 17:59:11,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:11,911 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2022-01-31 17:59:11,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:11,911 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2022-01-31 17:59:11,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 17:59:11,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:11,912 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:11,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:59:11,912 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:11,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:11,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1061618548, now seen corresponding path program 43 times [2022-01-31 17:59:11,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:11,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542729702] [2022-01-31 17:59:11,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:11,914 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:11,914 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:11,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:11,918 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:12,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:12,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-31 17:59:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:12,588 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:12,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542729702] [2022-01-31 17:59:12,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [542729702] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:12,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:12,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:59:12,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614563891] [2022-01-31 17:59:12,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:12,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:59:12,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:12,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:59:12,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:59:12,589 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand has 47 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 46 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:13,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:13,486 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2022-01-31 17:59:13,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:59:13,486 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 46 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 110 [2022-01-31 17:59:13,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:13,487 INFO L225 Difference]: With dead ends: 140 [2022-01-31 17:59:13,487 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 17:59:13,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:59:13,487 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 108 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:13,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 57 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:13,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 17:59:13,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2022-01-31 17:59:13,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 109 states have (on average 1.0275229357798166) internal successors, (112), 109 states have internal predecessors, (112), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:13,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2022-01-31 17:59:13,501 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 110 [2022-01-31 17:59:13,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:13,502 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2022-01-31 17:59:13,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 46 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:13,502 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2022-01-31 17:59:13,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-31 17:59:13,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:13,502 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:13,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:59:13,502 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:13,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:13,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1100250158, now seen corresponding path program 44 times [2022-01-31 17:59:13,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:13,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807022540] [2022-01-31 17:59:13,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:13,505 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:13,505 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:13,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:13,508 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:14,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:14,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-01-31 17:59:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:14,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:14,166 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:14,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807022540] [2022-01-31 17:59:14,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1807022540] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:14,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:14,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:59:14,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925008843] [2022-01-31 17:59:14,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:14,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:59:14,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:14,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:59:14,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:59:14,167 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 47 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:15,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:15,048 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2022-01-31 17:59:15,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:59:15,048 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 47 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 112 [2022-01-31 17:59:15,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:15,049 INFO L225 Difference]: With dead ends: 142 [2022-01-31 17:59:15,049 INFO L226 Difference]: Without dead ends: 120 [2022-01-31 17:59:15,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 5 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 17:59:15,050 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 110 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:15,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 57 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:15,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-01-31 17:59:15,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-01-31 17:59:15,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:15,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2022-01-31 17:59:15,065 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 112 [2022-01-31 17:59:15,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:15,065 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2022-01-31 17:59:15,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 47 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:15,065 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2022-01-31 17:59:15,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 17:59:15,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:15,066 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:15,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:59:15,066 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:15,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:15,066 INFO L85 PathProgramCache]: Analyzing trace with hash -108094640, now seen corresponding path program 45 times [2022-01-31 17:59:15,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:15,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019883159] [2022-01-31 17:59:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:15,068 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:15,068 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:15,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:15,071 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:15,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:15,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-31 17:59:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:15,802 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:15,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019883159] [2022-01-31 17:59:15,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1019883159] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:15,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:15,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:59:15,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185363740] [2022-01-31 17:59:15,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:15,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:59:15,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:15,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:59:15,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:59:15,804 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 48 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:16,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:16,743 INFO L93 Difference]: Finished difference Result 144 states and 148 transitions. [2022-01-31 17:59:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:59:16,743 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 48 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 114 [2022-01-31 17:59:16,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:16,744 INFO L225 Difference]: With dead ends: 144 [2022-01-31 17:59:16,744 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 17:59:16,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 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 17:59:16,745 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 112 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:16,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 47 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 17:59:16,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-01-31 17:59:16,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 113 states have internal predecessors, (116), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:16,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2022-01-31 17:59:16,761 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 114 [2022-01-31 17:59:16,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:16,762 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2022-01-31 17:59:16,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 48 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:16,762 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2022-01-31 17:59:16,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 17:59:16,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:16,762 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:16,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:59:16,762 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:16,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:16,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1686275598, now seen corresponding path program 46 times [2022-01-31 17:59:16,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:16,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561498694] [2022-01-31 17:59:16,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:16,764 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:16,765 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:16,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:16,769 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:17,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:17,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-01-31 17:59:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:17,513 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:17,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561498694] [2022-01-31 17:59:17,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1561498694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:17,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:17,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:59:17,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882241695] [2022-01-31 17:59:17,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:17,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:59:17,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:17,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:59:17,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:59:17,515 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:18,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:18,458 INFO L93 Difference]: Finished difference Result 146 states and 150 transitions. [2022-01-31 17:59:18,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:59:18,458 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 116 [2022-01-31 17:59:18,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:18,459 INFO L225 Difference]: With dead ends: 146 [2022-01-31 17:59:18,459 INFO L226 Difference]: Without dead ends: 124 [2022-01-31 17:59:18,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 5 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 17:59:18,460 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 114 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:18,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 47 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:18,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-31 17:59:18,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2022-01-31 17:59:18,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:18,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2022-01-31 17:59:18,476 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 116 [2022-01-31 17:59:18,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:18,476 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2022-01-31 17:59:18,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:18,476 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2022-01-31 17:59:18,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-31 17:59:18,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:18,477 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:18,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:59:18,477 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:18,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:18,477 INFO L85 PathProgramCache]: Analyzing trace with hash 2100246548, now seen corresponding path program 47 times [2022-01-31 17:59:18,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:18,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583273896] [2022-01-31 17:59:18,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:18,479 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:18,479 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:18,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:18,483 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:19,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:19,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-31 17:59:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:19,250 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:19,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583273896] [2022-01-31 17:59:19,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1583273896] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:19,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:19,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:59:19,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995845641] [2022-01-31 17:59:19,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:19,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:59:19,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:19,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:59:19,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:59:19,251 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand has 51 states, 51 states have (on average 2.156862745098039) internal successors, (110), 50 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:20,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:20,242 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2022-01-31 17:59:20,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:59:20,243 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.156862745098039) internal successors, (110), 50 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 118 [2022-01-31 17:59:20,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:20,243 INFO L225 Difference]: With dead ends: 148 [2022-01-31 17:59:20,243 INFO L226 Difference]: Without dead ends: 126 [2022-01-31 17:59:20,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:59:20,245 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 116 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:20,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 57 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:20,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-31 17:59:20,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2022-01-31 17:59:20,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 117 states have internal predecessors, (120), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:20,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2022-01-31 17:59:20,261 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 118 [2022-01-31 17:59:20,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:20,262 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2022-01-31 17:59:20,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.156862745098039) internal successors, (110), 50 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:20,262 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2022-01-31 17:59:20,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 17:59:20,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:20,262 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:20,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:59:20,262 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:20,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:20,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1184238154, now seen corresponding path program 48 times [2022-01-31 17:59:20,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:20,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504834971] [2022-01-31 17:59:20,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:20,264 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:20,264 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:20,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:20,268 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:21,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:21,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-01-31 17:59:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:21,084 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:21,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504834971] [2022-01-31 17:59:21,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1504834971] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:21,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:21,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:59:21,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545351860] [2022-01-31 17:59:21,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:21,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:59:21,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:21,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:59:21,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:59:21,088 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 51 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:22,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:22,100 INFO L93 Difference]: Finished difference Result 150 states and 154 transitions. [2022-01-31 17:59:22,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:59:22,100 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 51 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 120 [2022-01-31 17:59:22,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:22,101 INFO L225 Difference]: With dead ends: 150 [2022-01-31 17:59:22,101 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 17:59:22,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 5 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 17:59:22,102 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 118 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:22,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 47 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:22,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 17:59:22,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2022-01-31 17:59:22,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:22,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2022-01-31 17:59:22,119 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 120 [2022-01-31 17:59:22,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:22,119 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2022-01-31 17:59:22,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 51 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:22,119 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2022-01-31 17:59:22,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 17:59:22,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:22,120 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:22,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:59:22,120 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:22,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:22,120 INFO L85 PathProgramCache]: Analyzing trace with hash -773074216, now seen corresponding path program 49 times [2022-01-31 17:59:22,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:22,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241771738] [2022-01-31 17:59:22,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:22,122 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:22,122 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:22,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:22,126 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:22,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:22,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-01-31 17:59:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:22,964 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:22,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241771738] [2022-01-31 17:59:22,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [241771738] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:22,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:22,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:59:22,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561412095] [2022-01-31 17:59:22,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:22,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:59:22,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:22,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:59:22,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:59:22,966 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 53 states, 53 states have (on average 2.150943396226415) internal successors, (114), 52 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:24,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:24,068 INFO L93 Difference]: Finished difference Result 152 states and 156 transitions. [2022-01-31 17:59:24,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:59:24,069 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.150943396226415) internal successors, (114), 52 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 122 [2022-01-31 17:59:24,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:24,069 INFO L225 Difference]: With dead ends: 152 [2022-01-31 17:59:24,069 INFO L226 Difference]: Without dead ends: 130 [2022-01-31 17:59:24,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:59:24,071 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 120 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:24,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 52 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:59:24,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-31 17:59:24,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-01-31 17:59:24,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 121 states have (on average 1.024793388429752) internal successors, (124), 121 states have internal predecessors, (124), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:24,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2022-01-31 17:59:24,092 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 122 [2022-01-31 17:59:24,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:24,093 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2022-01-31 17:59:24,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.150943396226415) internal successors, (114), 52 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:24,093 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2022-01-31 17:59:24,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 17:59:24,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:24,093 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:24,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:59:24,093 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:24,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:24,094 INFO L85 PathProgramCache]: Analyzing trace with hash -781521030, now seen corresponding path program 50 times [2022-01-31 17:59:24,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:24,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397816266] [2022-01-31 17:59:24,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:24,095 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:24,095 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:24,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:24,099 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:24,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:24,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-01-31 17:59:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:24,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:24,938 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:24,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397816266] [2022-01-31 17:59:24,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1397816266] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:24,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:24,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:59:24,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165644571] [2022-01-31 17:59:24,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:24,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:59:24,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:24,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:59:24,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:59:24,940 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:26,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:26,056 INFO L93 Difference]: Finished difference Result 154 states and 158 transitions. [2022-01-31 17:59:26,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:59:26,056 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 124 [2022-01-31 17:59:26,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:26,057 INFO L225 Difference]: With dead ends: 154 [2022-01-31 17:59:26,057 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 17:59:26,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:59:26,058 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 122 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:26,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 47 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:59:26,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 17:59:26,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2022-01-31 17:59:26,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 123 states have (on average 1.024390243902439) internal successors, (126), 123 states have internal predecessors, (126), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:26,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2022-01-31 17:59:26,078 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 124 [2022-01-31 17:59:26,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:26,078 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2022-01-31 17:59:26,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:26,078 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2022-01-31 17:59:26,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-31 17:59:26,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:26,079 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:26,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:59:26,079 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:26,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:26,079 INFO L85 PathProgramCache]: Analyzing trace with hash -308974692, now seen corresponding path program 51 times [2022-01-31 17:59:26,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:26,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093091252] [2022-01-31 17:59:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:26,081 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:26,081 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:26,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:26,085 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:26,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:26,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-01-31 17:59:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:26,960 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:26,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093091252] [2022-01-31 17:59:26,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1093091252] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:26,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:26,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:59:26,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610544644] [2022-01-31 17:59:26,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:26,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:59:26,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:26,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:59:26,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:59:26,962 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:28,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:28,067 INFO L93 Difference]: Finished difference Result 156 states and 160 transitions. [2022-01-31 17:59:28,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:59:28,067 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 126 [2022-01-31 17:59:28,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:28,068 INFO L225 Difference]: With dead ends: 156 [2022-01-31 17:59:28,068 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 17:59:28,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 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 17:59:28,069 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 124 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:28,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 47 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:28,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 17:59:28,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-01-31 17:59:28,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:28,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2022-01-31 17:59:28,088 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 126 [2022-01-31 17:59:28,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:28,088 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2022-01-31 17:59:28,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:28,088 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2022-01-31 17:59:28,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-31 17:59:28,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:28,089 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:28,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:59:28,089 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:28,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:28,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1458477250, now seen corresponding path program 52 times [2022-01-31 17:59:28,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:28,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055486751] [2022-01-31 17:59:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:28,091 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:28,091 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:28,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:28,095 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:28,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:28,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-01-31 17:59:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:28,995 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:28,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055486751] [2022-01-31 17:59:28,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1055486751] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:28,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:28,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:59:28,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450098510] [2022-01-31 17:59:28,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:28,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:59:28,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:28,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:59:28,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:59:28,997 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 55 states have internal predecessors, (120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:30,142 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2022-01-31 17:59:30,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:59:30,142 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 55 states have internal predecessors, (120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 128 [2022-01-31 17:59:30,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:30,143 INFO L225 Difference]: With dead ends: 158 [2022-01-31 17:59:30,143 INFO L226 Difference]: Without dead ends: 136 [2022-01-31 17:59:30,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 5 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 17:59:30,144 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 126 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:30,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 47 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-31 17:59:30,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-01-31 17:59:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:30,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2022-01-31 17:59:30,164 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 128 [2022-01-31 17:59:30,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:30,164 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2022-01-31 17:59:30,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 55 states have internal predecessors, (120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:30,164 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2022-01-31 17:59:30,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-31 17:59:30,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:30,164 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:30,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:59:30,165 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:30,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:30,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1971126880, now seen corresponding path program 53 times [2022-01-31 17:59:30,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:30,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811755727] [2022-01-31 17:59:30,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:30,166 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:30,166 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:30,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:30,170 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:31,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:31,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-01-31 17:59:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:31,119 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:31,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811755727] [2022-01-31 17:59:31,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811755727] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:31,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:31,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:59:31,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316790594] [2022-01-31 17:59:31,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:31,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:59:31,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:31,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:59:31,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:59:31,121 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 57 states, 57 states have (on average 2.1403508771929824) internal successors, (122), 56 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:32,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:32,309 INFO L93 Difference]: Finished difference Result 160 states and 164 transitions. [2022-01-31 17:59:32,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:59:32,310 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1403508771929824) internal successors, (122), 56 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 130 [2022-01-31 17:59:32,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:32,310 INFO L225 Difference]: With dead ends: 160 [2022-01-31 17:59:32,310 INFO L226 Difference]: Without dead ends: 138 [2022-01-31 17:59:32,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 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 17:59:32,312 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 128 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:32,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 57 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:32,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-31 17:59:32,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2022-01-31 17:59:32,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:32,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2022-01-31 17:59:32,332 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 130 [2022-01-31 17:59:32,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:32,332 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2022-01-31 17:59:32,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1403508771929824) internal successors, (122), 56 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:32,332 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2022-01-31 17:59:32,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 17:59:32,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:32,332 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:32,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:59:32,333 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:32,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:32,333 INFO L85 PathProgramCache]: Analyzing trace with hash -714187518, now seen corresponding path program 54 times [2022-01-31 17:59:32,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:32,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212475447] [2022-01-31 17:59:32,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:32,335 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:32,335 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:32,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:32,339 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:33,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:33,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-01-31 17:59:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:33,321 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:33,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212475447] [2022-01-31 17:59:33,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1212475447] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:33,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:33,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:59:33,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398341296] [2022-01-31 17:59:33,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:33,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:59:33,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:33,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:59:33,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:59:33,322 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:34,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:34,569 INFO L93 Difference]: Finished difference Result 162 states and 166 transitions. [2022-01-31 17:59:34,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:59:34,569 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 132 [2022-01-31 17:59:34,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:34,570 INFO L225 Difference]: With dead ends: 162 [2022-01-31 17:59:34,570 INFO L226 Difference]: Without dead ends: 140 [2022-01-31 17:59:34,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:59:34,571 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 130 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:34,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 57 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:59:34,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-31 17:59:34,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-01-31 17:59:34,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:34,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2022-01-31 17:59:34,592 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 132 [2022-01-31 17:59:34,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:34,592 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2022-01-31 17:59:34,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:34,593 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2022-01-31 17:59:34,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 17:59:34,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:34,593 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:34,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:59:34,593 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:34,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:34,594 INFO L85 PathProgramCache]: Analyzing trace with hash -25979100, now seen corresponding path program 55 times [2022-01-31 17:59:34,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:34,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785208523] [2022-01-31 17:59:34,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:34,595 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:34,595 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:34,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:34,601 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:35,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:35,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-01-31 17:59:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:35,639 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:35,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785208523] [2022-01-31 17:59:35,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1785208523] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:35,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:35,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:59:35,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055691587] [2022-01-31 17:59:35,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:35,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:59:35,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:35,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:59:35,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:59:35,640 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand has 59 states, 59 states have (on average 2.135593220338983) internal successors, (126), 58 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:36,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:36,899 INFO L93 Difference]: Finished difference Result 164 states and 168 transitions. [2022-01-31 17:59:36,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:59:36,900 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.135593220338983) internal successors, (126), 58 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 134 [2022-01-31 17:59:36,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:36,900 INFO L225 Difference]: With dead ends: 164 [2022-01-31 17:59:36,900 INFO L226 Difference]: Without dead ends: 142 [2022-01-31 17:59:36,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:59:36,902 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 132 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:36,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 42 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:36,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-31 17:59:36,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2022-01-31 17:59:36,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:36,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2022-01-31 17:59:36,924 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 134 [2022-01-31 17:59:36,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:36,924 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2022-01-31 17:59:36,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.135593220338983) internal successors, (126), 58 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:36,924 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2022-01-31 17:59:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-31 17:59:36,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:36,925 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:36,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:59:36,925 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:36,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:36,925 INFO L85 PathProgramCache]: Analyzing trace with hash -82652986, now seen corresponding path program 56 times [2022-01-31 17:59:36,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:36,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800517130] [2022-01-31 17:59:36,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:36,927 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:36,927 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:36,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:36,939 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:37,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:37,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-01-31 17:59:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:37,986 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:37,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800517130] [2022-01-31 17:59:37,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1800517130] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:37,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:37,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:59:37,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211124735] [2022-01-31 17:59:37,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:37,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:59:37,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:37,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:59:37,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:59:37,988 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 59 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:39,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:39,309 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2022-01-31 17:59:39,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:59:39,310 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 59 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 136 [2022-01-31 17:59:39,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:39,310 INFO L225 Difference]: With dead ends: 166 [2022-01-31 17:59:39,310 INFO L226 Difference]: Without dead ends: 144 [2022-01-31 17:59:39,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:59:39,311 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 134 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:39,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 42 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:39,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-31 17:59:39,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2022-01-31 17:59:39,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:39,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2022-01-31 17:59:39,333 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 136 [2022-01-31 17:59:39,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:39,334 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2022-01-31 17:59:39,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 59 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:39,334 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2022-01-31 17:59:39,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 17:59:39,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:39,334 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:39,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:59:39,335 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:39,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:39,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1288317416, now seen corresponding path program 57 times [2022-01-31 17:59:39,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:39,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559367160] [2022-01-31 17:59:39,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:39,336 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:39,336 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:39,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:39,342 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:40,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:40,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-01-31 17:59:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:40,441 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:40,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559367160] [2022-01-31 17:59:40,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1559367160] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:40,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:40,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:59:40,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683386906] [2022-01-31 17:59:40,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:40,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:59:40,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:40,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:59:40,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:59:40,443 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand has 61 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 60 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:41,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:41,794 INFO L93 Difference]: Finished difference Result 168 states and 172 transitions. [2022-01-31 17:59:41,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:59:41,795 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 60 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 138 [2022-01-31 17:59:41,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:41,795 INFO L225 Difference]: With dead ends: 168 [2022-01-31 17:59:41,795 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 17:59:41,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 5 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 17:59:41,801 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 136 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:41,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 47 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:41,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 17:59:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-01-31 17:59:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 137 states have (on average 1.0218978102189782) internal successors, (140), 137 states have internal predecessors, (140), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:41,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2022-01-31 17:59:41,824 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 138 [2022-01-31 17:59:41,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:41,825 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2022-01-31 17:59:41,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 60 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:41,825 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2022-01-31 17:59:41,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 17:59:41,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:41,825 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:41,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:59:41,825 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:41,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:41,826 INFO L85 PathProgramCache]: Analyzing trace with hash 235913866, now seen corresponding path program 58 times [2022-01-31 17:59:41,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:41,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409379457] [2022-01-31 17:59:41,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:41,827 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:41,827 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:41,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:41,833 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:42,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:42,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-31 17:59:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:42,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:42,981 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:42,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409379457] [2022-01-31 17:59:42,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [409379457] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:42,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:42,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:59:42,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2784183] [2022-01-31 17:59:42,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:42,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:59:42,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:42,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:59:42,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:59:42,983 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:44,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:44,417 INFO L93 Difference]: Finished difference Result 170 states and 174 transitions. [2022-01-31 17:59:44,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:59:44,417 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 140 [2022-01-31 17:59:44,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:44,418 INFO L225 Difference]: With dead ends: 170 [2022-01-31 17:59:44,418 INFO L226 Difference]: Without dead ends: 148 [2022-01-31 17:59:44,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:59:44,420 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 138 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:44,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 52 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:59:44,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-31 17:59:44,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2022-01-31 17:59:44,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 139 states have (on average 1.0215827338129497) internal successors, (142), 139 states have internal predecessors, (142), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2022-01-31 17:59:44,445 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 140 [2022-01-31 17:59:44,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:44,445 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2022-01-31 17:59:44,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:44,446 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2022-01-31 17:59:44,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 17:59:44,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:44,446 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:44,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:59:44,446 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:44,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:44,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1806583124, now seen corresponding path program 59 times [2022-01-31 17:59:44,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:44,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811999661] [2022-01-31 17:59:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:44,448 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:44,448 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:44,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:44,459 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:45,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:45,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-31 17:59:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:45,604 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:45,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811999661] [2022-01-31 17:59:45,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811999661] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:45,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:45,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:59:45,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782054465] [2022-01-31 17:59:45,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:45,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:59:45,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:45,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:59:45,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:59:45,606 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand has 63 states, 63 states have (on average 2.126984126984127) internal successors, (134), 62 states have internal predecessors, (134), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:47,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:47,014 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2022-01-31 17:59:47,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:59:47,015 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.126984126984127) internal successors, (134), 62 states have internal predecessors, (134), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 142 [2022-01-31 17:59:47,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:47,015 INFO L225 Difference]: With dead ends: 172 [2022-01-31 17:59:47,015 INFO L226 Difference]: Without dead ends: 150 [2022-01-31 17:59:47,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 5 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 17:59:47,017 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 140 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:47,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 47 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:47,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-31 17:59:47,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2022-01-31 17:59:47,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2022-01-31 17:59:47,051 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 142 [2022-01-31 17:59:47,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:47,052 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2022-01-31 17:59:47,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.126984126984127) internal successors, (134), 62 states have internal predecessors, (134), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:47,052 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2022-01-31 17:59:47,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-31 17:59:47,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:47,052 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:47,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:59:47,052 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:47,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:47,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1846136242, now seen corresponding path program 60 times [2022-01-31 17:59:47,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:47,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388217733] [2022-01-31 17:59:47,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:47,054 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:47,054 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:47,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:47,060 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:48,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:48,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-01-31 17:59:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:48,249 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 17:59:48,249 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:48,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388217733] [2022-01-31 17:59:48,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [388217733] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:48,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:48,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:59:48,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287966679] [2022-01-31 17:59:48,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:48,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:59:48,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:48,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:59:48,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:59:48,251 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:49,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:49,757 INFO L93 Difference]: Finished difference Result 174 states and 178 transitions. [2022-01-31 17:59:49,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:59:49,757 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 144 [2022-01-31 17:59:49,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:49,758 INFO L225 Difference]: With dead ends: 174 [2022-01-31 17:59:49,758 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 17:59:49,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:59:49,759 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 142 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:49,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 67 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:59:49,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 17:59:49,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2022-01-31 17:59:49,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 143 states have (on average 1.020979020979021) internal successors, (146), 143 states have internal predecessors, (146), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:49,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2022-01-31 17:59:49,783 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 144 [2022-01-31 17:59:49,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:49,784 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2022-01-31 17:59:49,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:49,784 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2022-01-31 17:59:49,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 17:59:49,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:49,784 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:49,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:59:49,785 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:49,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:49,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1201976976, now seen corresponding path program 61 times [2022-01-31 17:59:49,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:49,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860312268] [2022-01-31 17:59:49,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:49,786 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:49,786 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:49,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:49,792 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:50,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:50,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-01-31 17:59:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:50,997 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:50,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860312268] [2022-01-31 17:59:50,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1860312268] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:50,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:50,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:59:50,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517133717] [2022-01-31 17:59:50,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:50,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:59:50,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:50,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:59:50,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:59:50,999 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand has 65 states, 65 states have (on average 2.123076923076923) internal successors, (138), 64 states have internal predecessors, (138), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:52,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:52,537 INFO L93 Difference]: Finished difference Result 176 states and 180 transitions. [2022-01-31 17:59:52,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:59:52,538 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.123076923076923) internal successors, (138), 64 states have internal predecessors, (138), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 146 [2022-01-31 17:59:52,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:52,538 INFO L225 Difference]: With dead ends: 176 [2022-01-31 17:59:52,539 INFO L226 Difference]: Without dead ends: 154 [2022-01-31 17:59:52,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:59:52,540 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 144 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:52,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 52 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:59:52,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-31 17:59:52,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2022-01-31 17:59:52,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 145 states have internal predecessors, (148), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:52,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2022-01-31 17:59:52,568 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 146 [2022-01-31 17:59:52,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:52,568 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2022-01-31 17:59:52,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.123076923076923) internal successors, (138), 64 states have internal predecessors, (138), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:52,568 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2022-01-31 17:59:52,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-31 17:59:52,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:52,569 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:52,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:59:52,569 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:52,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:52,569 INFO L85 PathProgramCache]: Analyzing trace with hash -640212974, now seen corresponding path program 62 times [2022-01-31 17:59:52,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:52,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210857097] [2022-01-31 17:59:52,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:52,571 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:52,571 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:52,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:52,579 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:52,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:53,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:53,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-01-31 17:59:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:53,871 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:53,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210857097] [2022-01-31 17:59:53,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1210857097] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:53,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:53,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:59:53,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674662767] [2022-01-31 17:59:53,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:53,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:59:53,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:53,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:59:53,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:59:53,873 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:55,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:55,455 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2022-01-31 17:59:55,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:59:55,455 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 148 [2022-01-31 17:59:55,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:55,456 INFO L225 Difference]: With dead ends: 178 [2022-01-31 17:59:55,456 INFO L226 Difference]: Without dead ends: 156 [2022-01-31 17:59:55,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:59:55,465 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 146 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:55,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 72 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:59:55,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-01-31 17:59:55,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2022-01-31 17:59:55,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 147 states have (on average 1.0204081632653061) internal successors, (150), 147 states have internal predecessors, (150), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:55,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2022-01-31 17:59:55,491 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 148 [2022-01-31 17:59:55,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:55,491 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2022-01-31 17:59:55,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2022-01-31 17:59:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 17:59:55,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:55,492 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:55,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:59:55,492 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:55,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:55,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1950886348, now seen corresponding path program 63 times [2022-01-31 17:59:55,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:55,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029787910] [2022-01-31 17:59:55,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:55,494 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:55,494 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:55,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:55,501 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:56,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:56,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-01-31 17:59:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:56,762 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:56,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029787910] [2022-01-31 17:59:56,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2029787910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:56,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:56,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:59:56,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141913270] [2022-01-31 17:59:56,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:56,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:59:56,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:56,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:59:56,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:59:56,764 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand has 67 states, 67 states have (on average 2.1194029850746268) internal successors, (142), 66 states have internal predecessors, (142), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:58,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:59:58,354 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2022-01-31 17:59:58,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:59:58,355 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1194029850746268) internal successors, (142), 66 states have internal predecessors, (142), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 150 [2022-01-31 17:59:58,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:59:58,355 INFO L225 Difference]: With dead ends: 180 [2022-01-31 17:59:58,355 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 17:59:58,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:59:58,357 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 148 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:59:58,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 57 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:59:58,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 17:59:58,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2022-01-31 17:59:58,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.0201342281879195) internal successors, (152), 149 states have internal predecessors, (152), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:59:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2022-01-31 17:59:58,384 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 150 [2022-01-31 17:59:58,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:59:58,384 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2022-01-31 17:59:58,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1194029850746268) internal successors, (142), 66 states have internal predecessors, (142), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:59:58,385 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2022-01-31 17:59:58,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 17:59:58,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:59:58,385 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:59:58,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:59:58,385 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:59:58,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:59:58,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1212386262, now seen corresponding path program 64 times [2022-01-31 17:59:58,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:59:58,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294342509] [2022-01-31 17:59:58,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:59:58,387 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:59:58,387 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:59:58,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:59:58,394 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:59:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:59,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:59:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:59,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-01-31 17:59:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:59:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:59:59,707 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:59:59,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294342509] [2022-01-31 17:59:59,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [294342509] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:59:59,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:59:59,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:59:59,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494793214] [2022-01-31 17:59:59,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:59:59,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:59:59,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:59:59,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:59:59,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:59:59,709 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 67 states have internal predecessors, (144), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:01,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:01,428 INFO L93 Difference]: Finished difference Result 182 states and 186 transitions. [2022-01-31 18:00:01,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 18:00:01,428 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 67 states have internal predecessors, (144), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 152 [2022-01-31 18:00:01,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:01,429 INFO L225 Difference]: With dead ends: 182 [2022-01-31 18:00:01,429 INFO L226 Difference]: Without dead ends: 160 [2022-01-31 18:00:01,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 18:00:01,430 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 150 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:01,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 77 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:00:01,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-31 18:00:01,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2022-01-31 18:00:01,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 151 states have (on average 1.0198675496688743) internal successors, (154), 151 states have internal predecessors, (154), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:00:01,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2022-01-31 18:00:01,458 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 152 [2022-01-31 18:00:01,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:01,458 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2022-01-31 18:00:01,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 67 states have internal predecessors, (144), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:01,458 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2022-01-31 18:00:01,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 18:00:01,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:01,459 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:01,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 18:00:01,459 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:01,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:01,459 INFO L85 PathProgramCache]: Analyzing trace with hash 280518904, now seen corresponding path program 65 times [2022-01-31 18:00:01,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:01,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415499558] [2022-01-31 18:00:01,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:01,461 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:01,461 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:01,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:01,468 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:02,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:02,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-01-31 18:00:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:02,852 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:02,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415499558] [2022-01-31 18:00:02,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [415499558] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:02,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:02,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 18:00:02,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163852494] [2022-01-31 18:00:02,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:02,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 18:00:02,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:02,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 18:00:02,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 18:00:02,854 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 68 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:04,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:04,569 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2022-01-31 18:00:04,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 18:00:04,569 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 68 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 154 [2022-01-31 18:00:04,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:04,570 INFO L225 Difference]: With dead ends: 184 [2022-01-31 18:00:04,570 INFO L226 Difference]: Without dead ends: 162 [2022-01-31 18:00:04,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 18:00:04,572 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 152 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:04,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 32 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:00:04,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-01-31 18:00:04,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2022-01-31 18:00:04,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 153 states have (on average 1.0196078431372548) internal successors, (156), 153 states have internal predecessors, (156), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:00:04,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2022-01-31 18:00:04,600 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 154 [2022-01-31 18:00:04,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:04,601 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2022-01-31 18:00:04,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 68 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:04,601 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2022-01-31 18:00:04,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-31 18:00:04,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:04,601 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:04,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 18:00:04,602 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:04,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:04,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1890814566, now seen corresponding path program 66 times [2022-01-31 18:00:04,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:04,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832666499] [2022-01-31 18:00:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:04,603 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:04,603 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:04,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:04,611 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:06,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:06,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:06,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-01-31 18:00:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:06,025 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:06,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832666499] [2022-01-31 18:00:06,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [832666499] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:06,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:06,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 18:00:06,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164871043] [2022-01-31 18:00:06,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:06,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 18:00:06,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:06,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 18:00:06,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 18:00:06,027 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:07,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:07,958 INFO L93 Difference]: Finished difference Result 186 states and 190 transitions. [2022-01-31 18:00:07,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 18:00:07,958 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 156 [2022-01-31 18:00:07,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:07,959 INFO L225 Difference]: With dead ends: 186 [2022-01-31 18:00:07,959 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 18:00:07,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 18:00:07,960 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 154 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:07,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 42 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:00:07,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 18:00:08,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2022-01-31 18:00:08,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 155 states have (on average 1.0193548387096774) internal successors, (158), 155 states have internal predecessors, (158), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:00:08,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2022-01-31 18:00:08,008 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 156 [2022-01-31 18:00:08,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:08,008 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2022-01-31 18:00:08,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:08,008 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2022-01-31 18:00:08,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 18:00:08,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:08,009 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:08,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 18:00:08,009 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:08,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:08,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1188173380, now seen corresponding path program 67 times [2022-01-31 18:00:08,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:08,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645155961] [2022-01-31 18:00:08,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:08,011 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:08,011 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:08,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:08,021 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:09,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:09,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-01-31 18:00:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:09,537 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:09,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645155961] [2022-01-31 18:00:09,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1645155961] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:09,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:09,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 18:00:09,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579153638] [2022-01-31 18:00:09,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:09,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 18:00:09,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:09,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 18:00:09,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 18:00:09,539 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand has 71 states, 71 states have (on average 2.112676056338028) internal successors, (150), 70 states have internal predecessors, (150), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:11,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:11,483 INFO L93 Difference]: Finished difference Result 188 states and 192 transitions. [2022-01-31 18:00:11,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 18:00:11,483 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.112676056338028) internal successors, (150), 70 states have internal predecessors, (150), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 158 [2022-01-31 18:00:11,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:11,484 INFO L225 Difference]: With dead ends: 188 [2022-01-31 18:00:11,484 INFO L226 Difference]: Without dead ends: 166 [2022-01-31 18:00:11,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 18:00:11,485 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 156 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:11,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 62 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:00:11,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-31 18:00:11,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2022-01-31 18:00:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 157 states have (on average 1.019108280254777) internal successors, (160), 157 states have internal predecessors, (160), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:00:11,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2022-01-31 18:00:11,515 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 158 [2022-01-31 18:00:11,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:11,515 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2022-01-31 18:00:11,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.112676056338028) internal successors, (150), 70 states have internal predecessors, (150), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:11,515 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2022-01-31 18:00:11,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 18:00:11,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:11,516 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:11,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 18:00:11,516 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:11,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:11,516 INFO L85 PathProgramCache]: Analyzing trace with hash -259859106, now seen corresponding path program 68 times [2022-01-31 18:00:11,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:11,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898887253] [2022-01-31 18:00:11,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:11,518 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:11,518 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:11,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:11,526 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:13,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:13,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-01-31 18:00:13,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:13,033 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:13,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898887253] [2022-01-31 18:00:13,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1898887253] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:13,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:13,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 18:00:13,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145400352] [2022-01-31 18:00:13,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:13,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 18:00:13,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:13,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 18:00:13,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 18:00:13,035 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand has 72 states, 72 states have (on average 2.111111111111111) internal successors, (152), 71 states have internal predecessors, (152), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:14,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:14,896 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2022-01-31 18:00:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 18:00:14,896 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.111111111111111) internal successors, (152), 71 states have internal predecessors, (152), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 160 [2022-01-31 18:00:14,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:14,897 INFO L225 Difference]: With dead ends: 190 [2022-01-31 18:00:14,897 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 18:00:14,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 18:00:14,899 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 158 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:14,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 37 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:00:14,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 18:00:14,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2022-01-31 18:00:14,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 159 states have (on average 1.0188679245283019) internal successors, (162), 159 states have internal predecessors, (162), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:00:14,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2022-01-31 18:00:14,931 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 160 [2022-01-31 18:00:14,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:14,931 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2022-01-31 18:00:14,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.111111111111111) internal successors, (152), 71 states have internal predecessors, (152), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:14,931 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2022-01-31 18:00:14,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 18:00:14,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:14,932 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:14,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 18:00:14,932 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:14,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:14,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1503039360, now seen corresponding path program 69 times [2022-01-31 18:00:14,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:14,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566425881] [2022-01-31 18:00:14,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:14,934 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:14,934 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:14,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:14,941 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:16,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:16,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:16,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-01-31 18:00:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:16,580 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:16,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566425881] [2022-01-31 18:00:16,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [566425881] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:16,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:16,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 18:00:16,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382696624] [2022-01-31 18:00:16,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:16,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 18:00:16,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:16,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 18:00:16,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:00:16,582 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand has 73 states, 73 states have (on average 2.1095890410958904) internal successors, (154), 72 states have internal predecessors, (154), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:18,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:18,583 INFO L93 Difference]: Finished difference Result 192 states and 196 transitions. [2022-01-31 18:00:18,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 18:00:18,584 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1095890410958904) internal successors, (154), 72 states have internal predecessors, (154), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 162 [2022-01-31 18:00:18,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:18,585 INFO L225 Difference]: With dead ends: 192 [2022-01-31 18:00:18,585 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 18:00:18,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 18:00:18,586 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 160 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:18,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 57 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:00:18,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 18:00:18,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2022-01-31 18:00:18,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 161 states have (on average 1.0186335403726707) internal successors, (164), 161 states have internal predecessors, (164), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:00:18,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2022-01-31 18:00:18,619 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 162 [2022-01-31 18:00:18,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:18,619 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2022-01-31 18:00:18,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.1095890410958904) internal successors, (154), 72 states have internal predecessors, (154), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:18,619 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2022-01-31 18:00:18,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 18:00:18,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:18,620 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:18,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 18:00:18,620 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:18,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:18,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2096612130, now seen corresponding path program 70 times [2022-01-31 18:00:18,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:18,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786634173] [2022-01-31 18:00:18,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:18,622 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:18,622 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:18,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:18,630 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:20,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:20,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-01-31 18:00:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:20,322 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:20,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786634173] [2022-01-31 18:00:20,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1786634173] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:20,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:20,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 18:00:20,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252545353] [2022-01-31 18:00:20,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:20,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 18:00:20,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:20,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 18:00:20,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 18:00:20,324 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:22,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:22,480 INFO L93 Difference]: Finished difference Result 194 states and 198 transitions. [2022-01-31 18:00:22,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 18:00:22,480 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 164 [2022-01-31 18:00:22,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:22,481 INFO L225 Difference]: With dead ends: 194 [2022-01-31 18:00:22,481 INFO L226 Difference]: Without dead ends: 172 [2022-01-31 18:00:22,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 18:00:22,483 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 162 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:22,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 62 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:00:22,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-01-31 18:00:22,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2022-01-31 18:00:22,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 163 states have (on average 1.01840490797546) internal successors, (166), 163 states have internal predecessors, (166), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:00:22,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2022-01-31 18:00:22,517 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 164 [2022-01-31 18:00:22,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:22,517 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2022-01-31 18:00:22,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:22,518 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2022-01-31 18:00:22,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 18:00:22,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:22,518 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:22,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 18:00:22,519 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:22,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:22,519 INFO L85 PathProgramCache]: Analyzing trace with hash -381946556, now seen corresponding path program 71 times [2022-01-31 18:00:22,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:22,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976254205] [2022-01-31 18:00:22,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:22,521 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:22,521 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:22,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:22,529 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:24,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:24,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-01-31 18:00:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:24,269 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:24,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976254205] [2022-01-31 18:00:24,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1976254205] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:24,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:24,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 18:00:24,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134760498] [2022-01-31 18:00:24,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:24,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 18:00:24,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:24,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 18:00:24,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 18:00:24,271 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand has 75 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 74 states have internal predecessors, (158), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:26,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:26,465 INFO L93 Difference]: Finished difference Result 196 states and 200 transitions. [2022-01-31 18:00:26,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 18:00:26,465 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 74 states have internal predecessors, (158), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 166 [2022-01-31 18:00:26,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:26,466 INFO L225 Difference]: With dead ends: 196 [2022-01-31 18:00:26,466 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 18:00:26,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 18:00:26,467 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 164 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:26,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 42 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:00:26,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 18:00:26,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2022-01-31 18:00:26,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 165 states have (on average 1.018181818181818) internal successors, (168), 165 states have internal predecessors, (168), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:00:26,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2022-01-31 18:00:26,499 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 166 [2022-01-31 18:00:26,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:26,500 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2022-01-31 18:00:26,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 74 states have internal predecessors, (158), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:26,500 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2022-01-31 18:00:26,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-31 18:00:26,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:26,500 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:26,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 18:00:26,500 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:26,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:26,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1430005478, now seen corresponding path program 72 times [2022-01-31 18:00:26,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:26,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421252411] [2022-01-31 18:00:26,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:26,502 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:26,502 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:26,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:26,510 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:28,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:28,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-01-31 18:00:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:28,242 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:28,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421252411] [2022-01-31 18:00:28,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1421252411] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:28,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:28,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 18:00:28,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260085954] [2022-01-31 18:00:28,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:28,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 18:00:28,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:28,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 18:00:28,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 18:00:28,243 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 76 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 75 states have internal predecessors, (160), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:30,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:30,287 INFO L93 Difference]: Finished difference Result 198 states and 202 transitions. [2022-01-31 18:00:30,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 18:00:30,288 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 75 states have internal predecessors, (160), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 168 [2022-01-31 18:00:30,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:30,288 INFO L225 Difference]: With dead ends: 198 [2022-01-31 18:00:30,288 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 18:00:30,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 18:00:30,291 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 166 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:30,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 52 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:00:30,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 18:00:30,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2022-01-31 18:00:30,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.0179640718562875) internal successors, (170), 167 states have internal predecessors, (170), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:00:30,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2022-01-31 18:00:30,352 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 168 [2022-01-31 18:00:30,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:30,352 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2022-01-31 18:00:30,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 75 states have internal predecessors, (160), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:30,352 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2022-01-31 18:00:30,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 18:00:30,353 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:30,353 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:30,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 18:00:30,353 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:30,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:30,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1040812024, now seen corresponding path program 73 times [2022-01-31 18:00:30,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:30,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289865592] [2022-01-31 18:00:30,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:30,355 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:30,356 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:30,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:30,366 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:32,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:32,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-01-31 18:00:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:32,111 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:32,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289865592] [2022-01-31 18:00:32,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1289865592] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:32,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:32,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 18:00:32,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682143287] [2022-01-31 18:00:32,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:32,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 18:00:32,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:32,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 18:00:32,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 18:00:32,122 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand has 77 states, 77 states have (on average 2.103896103896104) internal successors, (162), 76 states have internal predecessors, (162), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:34,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:34,320 INFO L93 Difference]: Finished difference Result 200 states and 204 transitions. [2022-01-31 18:00:34,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 18:00:34,321 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.103896103896104) internal successors, (162), 76 states have internal predecessors, (162), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 170 [2022-01-31 18:00:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:34,321 INFO L225 Difference]: With dead ends: 200 [2022-01-31 18:00:34,321 INFO L226 Difference]: Without dead ends: 178 [2022-01-31 18:00:34,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 18:00:34,324 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 168 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:34,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 57 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:00:34,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-31 18:00:34,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2022-01-31 18:00:34,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 169 states have (on average 1.017751479289941) internal successors, (172), 169 states have internal predecessors, (172), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:00:34,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2022-01-31 18:00:34,373 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 170 [2022-01-31 18:00:34,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:34,373 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2022-01-31 18:00:34,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.103896103896104) internal successors, (162), 76 states have internal predecessors, (162), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:34,373 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2022-01-31 18:00:34,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 18:00:34,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:34,374 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:34,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 18:00:34,374 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:34,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:34,375 INFO L85 PathProgramCache]: Analyzing trace with hash -379516758, now seen corresponding path program 74 times [2022-01-31 18:00:34,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:34,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380945788] [2022-01-31 18:00:34,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:34,376 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:34,377 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:34,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:34,386 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:36,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:36,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-01-31 18:00:36,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:36,232 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 18:00:36,232 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:36,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380945788] [2022-01-31 18:00:36,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1380945788] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:36,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:36,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 18:00:36,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168103729] [2022-01-31 18:00:36,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:36,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 18:00:36,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:36,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 18:00:36,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 18:00:36,235 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:38,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:38,440 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2022-01-31 18:00:38,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 18:00:38,440 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 172 [2022-01-31 18:00:38,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:38,441 INFO L225 Difference]: With dead ends: 202 [2022-01-31 18:00:38,441 INFO L226 Difference]: Without dead ends: 180 [2022-01-31 18:00:38,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 18:00:38,443 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 170 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:38,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 47 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:00:38,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-01-31 18:00:38,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2022-01-31 18:00:38,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 171 states have (on average 1.0175438596491229) internal successors, (174), 171 states have internal predecessors, (174), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:00:38,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2022-01-31 18:00:38,494 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 172 [2022-01-31 18:00:38,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:38,494 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2022-01-31 18:00:38,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:38,495 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2022-01-31 18:00:38,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 18:00:38,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:38,495 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:38,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 18:00:38,495 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:38,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:38,496 INFO L85 PathProgramCache]: Analyzing trace with hash -529925940, now seen corresponding path program 75 times [2022-01-31 18:00:38,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:38,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41347207] [2022-01-31 18:00:38,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:38,497 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:38,497 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:38,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:38,505 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:40,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:40,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-01-31 18:00:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:40,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:40,289 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:40,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41347207] [2022-01-31 18:00:40,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [41347207] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:40,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:40,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 18:00:40,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463370845] [2022-01-31 18:00:40,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:40,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 18:00:40,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:40,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 18:00:40,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 18:00:40,292 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand has 79 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 78 states have internal predecessors, (166), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:42,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:42,680 INFO L93 Difference]: Finished difference Result 204 states and 208 transitions. [2022-01-31 18:00:42,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 18:00:42,680 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 78 states have internal predecessors, (166), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 174 [2022-01-31 18:00:42,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:42,681 INFO L225 Difference]: With dead ends: 204 [2022-01-31 18:00:42,681 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 18:00:42,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 18:00:42,683 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 172 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:42,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 47 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:00:42,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 18:00:42,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2022-01-31 18:00:42,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 173 states have (on average 1.0173410404624277) internal successors, (176), 173 states have internal predecessors, (176), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:00:42,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2022-01-31 18:00:42,732 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 174 [2022-01-31 18:00:42,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:42,732 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2022-01-31 18:00:42,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 78 states have internal predecessors, (166), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:42,732 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2022-01-31 18:00:42,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-31 18:00:42,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:42,733 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:42,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 18:00:42,733 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:42,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:42,733 INFO L85 PathProgramCache]: Analyzing trace with hash 955738222, now seen corresponding path program 76 times [2022-01-31 18:00:42,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:42,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348769903] [2022-01-31 18:00:42,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:42,735 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:42,735 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:42,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:42,744 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:44,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:44,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-01-31 18:00:44,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:44,649 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:44,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348769903] [2022-01-31 18:00:44,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1348769903] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:44,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:44,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 18:00:44,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960030431] [2022-01-31 18:00:44,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:44,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 18:00:44,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:44,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 18:00:44,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 18:00:44,652 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand has 80 states, 80 states have (on average 2.1) internal successors, (168), 79 states have internal predecessors, (168), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:47,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:47,071 INFO L93 Difference]: Finished difference Result 206 states and 210 transitions. [2022-01-31 18:00:47,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 18:00:47,072 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.1) internal successors, (168), 79 states have internal predecessors, (168), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 176 [2022-01-31 18:00:47,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:47,072 INFO L225 Difference]: With dead ends: 206 [2022-01-31 18:00:47,072 INFO L226 Difference]: Without dead ends: 184 [2022-01-31 18:00:47,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 18:00:47,075 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 174 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:47,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 57 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:00:47,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-31 18:00:47,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2022-01-31 18:00:47,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 175 states have (on average 1.0171428571428571) internal successors, (178), 175 states have internal predecessors, (178), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:00:47,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2022-01-31 18:00:47,132 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 176 [2022-01-31 18:00:47,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:47,133 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2022-01-31 18:00:47,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.1) internal successors, (168), 79 states have internal predecessors, (168), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:47,133 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2022-01-31 18:00:47,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-31 18:00:47,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:47,133 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:47,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 18:00:47,134 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:47,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:47,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1545111664, now seen corresponding path program 77 times [2022-01-31 18:00:47,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:47,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869848950] [2022-01-31 18:00:47,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:47,136 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:47,136 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:47,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:47,146 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:49,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:49,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-01-31 18:00:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:49,145 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:49,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869848950] [2022-01-31 18:00:49,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1869848950] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:49,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:49,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 18:00:49,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821751705] [2022-01-31 18:00:49,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:49,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 18:00:49,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:49,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 18:00:49,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 18:00:49,148 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 80 states have internal predecessors, (170), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:51,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:51,702 INFO L93 Difference]: Finished difference Result 208 states and 212 transitions. [2022-01-31 18:00:51,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 18:00:51,703 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 80 states have internal predecessors, (170), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 178 [2022-01-31 18:00:51,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:51,703 INFO L225 Difference]: With dead ends: 208 [2022-01-31 18:00:51,703 INFO L226 Difference]: Without dead ends: 186 [2022-01-31 18:00:51,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 18:00:51,704 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 176 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:51,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 52 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:00:51,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-31 18:00:51,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2022-01-31 18:00:51,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 177 states have (on average 1.0169491525423728) internal successors, (180), 177 states have internal predecessors, (180), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:00:51,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2022-01-31 18:00:51,743 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 178 [2022-01-31 18:00:51,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:51,744 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2022-01-31 18:00:51,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 80 states have internal predecessors, (170), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:51,744 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2022-01-31 18:00:51,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 18:00:51,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:51,744 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:51,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 18:00:51,745 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:51,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:51,745 INFO L85 PathProgramCache]: Analyzing trace with hash 319833650, now seen corresponding path program 78 times [2022-01-31 18:00:51,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:51,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838741586] [2022-01-31 18:00:51,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:51,746 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:51,746 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:51,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:51,757 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:53,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:53,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-01-31 18:00:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:53,788 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 18:00:53,789 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:53,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838741586] [2022-01-31 18:00:53,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [838741586] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:53,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:53,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 18:00:53,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976025593] [2022-01-31 18:00:53,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:53,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 18:00:53,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:53,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 18:00:53,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 18:00:53,790 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:56,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:00:56,280 INFO L93 Difference]: Finished difference Result 210 states and 214 transitions. [2022-01-31 18:00:56,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 18:00:56,280 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 180 [2022-01-31 18:00:56,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:00:56,281 INFO L225 Difference]: With dead ends: 210 [2022-01-31 18:00:56,281 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 18:00:56,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 18:00:56,282 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 178 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:00:56,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 42 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:00:56,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 18:00:56,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2022-01-31 18:00:56,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 179 states have (on average 1.0167597765363128) internal successors, (182), 179 states have internal predecessors, (182), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:00:56,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2022-01-31 18:00:56,322 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 180 [2022-01-31 18:00:56,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:00:56,322 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2022-01-31 18:00:56,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:00:56,322 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2022-01-31 18:00:56,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 18:00:56,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:00:56,323 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:00:56,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 18:00:56,323 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:00:56,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:00:56,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1530917972, now seen corresponding path program 79 times [2022-01-31 18:00:56,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:00:56,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561234151] [2022-01-31 18:00:56,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:00:56,325 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:00:56,325 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:00:56,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:00:56,335 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:00:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:58,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:00:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:58,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-01-31 18:00:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:00:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:00:58,321 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:00:58,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561234151] [2022-01-31 18:00:58,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1561234151] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:00:58,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:00:58,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 18:00:58,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066140388] [2022-01-31 18:00:58,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:00:58,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 18:00:58,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:00:58,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 18:00:58,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 18:00:58,323 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand has 83 states, 83 states have (on average 2.0963855421686746) internal successors, (174), 82 states have internal predecessors, (174), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:00,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:00,771 INFO L93 Difference]: Finished difference Result 212 states and 216 transitions. [2022-01-31 18:01:00,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 18:01:00,772 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0963855421686746) internal successors, (174), 82 states have internal predecessors, (174), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 182 [2022-01-31 18:01:00,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:00,773 INFO L225 Difference]: With dead ends: 212 [2022-01-31 18:01:00,773 INFO L226 Difference]: Without dead ends: 190 [2022-01-31 18:01:00,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 18:01:00,774 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 180 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:00,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 42 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:01:00,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-31 18:01:00,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2022-01-31 18:01:00,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 181 states have (on average 1.0165745856353592) internal successors, (184), 181 states have internal predecessors, (184), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:01:00,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2022-01-31 18:01:00,816 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 182 [2022-01-31 18:01:00,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:00,817 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2022-01-31 18:01:00,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0963855421686746) internal successors, (174), 82 states have internal predecessors, (174), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2022-01-31 18:01:00,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-01-31 18:01:00,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:00,817 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:00,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 18:01:00,818 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:00,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:00,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1446814198, now seen corresponding path program 80 times [2022-01-31 18:01:00,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:00,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326736980] [2022-01-31 18:01:00,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:00,819 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:00,819 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:00,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:00,830 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:02,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:02,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-01-31 18:01:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:02,923 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:02,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326736980] [2022-01-31 18:01:02,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1326736980] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:02,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:02,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 18:01:02,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613479535] [2022-01-31 18:01:02,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:02,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 18:01:02,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:02,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 18:01:02,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 18:01:02,926 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand has 84 states, 84 states have (on average 2.0952380952380953) internal successors, (176), 83 states have internal predecessors, (176), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:05,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:05,430 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2022-01-31 18:01:05,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 18:01:05,430 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0952380952380953) internal successors, (176), 83 states have internal predecessors, (176), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 184 [2022-01-31 18:01:05,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:05,431 INFO L225 Difference]: With dead ends: 214 [2022-01-31 18:01:05,431 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 18:01:05,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 18:01:05,433 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 182 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:05,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 62 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:01:05,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 18:01:05,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2022-01-31 18:01:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 183 states have (on average 1.0163934426229508) internal successors, (186), 183 states have internal predecessors, (186), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:01:05,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2022-01-31 18:01:05,486 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 184 [2022-01-31 18:01:05,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:05,487 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2022-01-31 18:01:05,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0952380952380953) internal successors, (176), 83 states have internal predecessors, (176), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:05,487 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2022-01-31 18:01:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 18:01:05,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:05,488 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:05,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 18:01:05,488 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:05,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:05,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2067501288, now seen corresponding path program 81 times [2022-01-31 18:01:05,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:05,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677797867] [2022-01-31 18:01:05,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:05,490 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:05,490 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:05,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:05,501 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:07,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:07,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-01-31 18:01:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:07,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:07,684 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:07,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677797867] [2022-01-31 18:01:07,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [677797867] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:07,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:07,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 18:01:07,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921512021] [2022-01-31 18:01:07,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:07,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 18:01:07,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:07,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 18:01:07,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 18:01:07,687 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand has 85 states, 85 states have (on average 2.0941176470588236) internal successors, (178), 84 states have internal predecessors, (178), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:10,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:10,461 INFO L93 Difference]: Finished difference Result 216 states and 220 transitions. [2022-01-31 18:01:10,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 18:01:10,461 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0941176470588236) internal successors, (178), 84 states have internal predecessors, (178), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 186 [2022-01-31 18:01:10,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:10,462 INFO L225 Difference]: With dead ends: 216 [2022-01-31 18:01:10,462 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 18:01:10,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 18:01:10,464 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 184 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:10,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 47 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:01:10,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 18:01:10,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2022-01-31 18:01:10,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 185 states have (on average 1.0162162162162163) internal successors, (188), 185 states have internal predecessors, (188), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:01:10,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2022-01-31 18:01:10,524 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 186 [2022-01-31 18:01:10,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:10,525 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2022-01-31 18:01:10,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0941176470588236) internal successors, (178), 84 states have internal predecessors, (178), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:10,525 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2022-01-31 18:01:10,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 18:01:10,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:10,526 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:10,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 18:01:10,526 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:10,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:10,526 INFO L85 PathProgramCache]: Analyzing trace with hash 814578618, now seen corresponding path program 82 times [2022-01-31 18:01:10,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:10,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846887479] [2022-01-31 18:01:10,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:10,528 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:10,528 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:10,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:10,542 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:12,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:12,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-01-31 18:01:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:12,797 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:12,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846887479] [2022-01-31 18:01:12,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1846887479] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:12,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:12,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 18:01:12,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149665454] [2022-01-31 18:01:12,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:12,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 18:01:12,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:12,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 18:01:12,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 18:01:12,799 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:15,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:15,625 INFO L93 Difference]: Finished difference Result 218 states and 222 transitions. [2022-01-31 18:01:15,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 18:01:15,625 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 188 [2022-01-31 18:01:15,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:15,626 INFO L225 Difference]: With dead ends: 218 [2022-01-31 18:01:15,626 INFO L226 Difference]: Without dead ends: 196 [2022-01-31 18:01:15,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 18:01:15,628 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 186 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:15,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 62 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:01:15,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-01-31 18:01:15,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2022-01-31 18:01:15,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 187 states have (on average 1.0160427807486632) internal successors, (190), 187 states have internal predecessors, (190), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:01:15,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2022-01-31 18:01:15,672 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 188 [2022-01-31 18:01:15,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:15,672 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2022-01-31 18:01:15,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:15,672 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2022-01-31 18:01:15,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 18:01:15,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:15,673 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:15,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 18:01:15,673 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:15,673 INFO L85 PathProgramCache]: Analyzing trace with hash 239462364, now seen corresponding path program 83 times [2022-01-31 18:01:15,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:15,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461386118] [2022-01-31 18:01:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:15,675 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:15,675 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:15,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:15,687 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:17,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:17,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-01-31 18:01:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:17,996 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:17,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461386118] [2022-01-31 18:01:17,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1461386118] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:17,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:17,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 18:01:17,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172778803] [2022-01-31 18:01:17,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:17,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 18:01:17,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:18,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 18:01:18,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 18:01:18,001 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand has 87 states, 87 states have (on average 2.0919540229885056) internal successors, (182), 86 states have internal predecessors, (182), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:20,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:20,805 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2022-01-31 18:01:20,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 18:01:20,805 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0919540229885056) internal successors, (182), 86 states have internal predecessors, (182), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 190 [2022-01-31 18:01:20,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:20,806 INFO L225 Difference]: With dead ends: 220 [2022-01-31 18:01:20,806 INFO L226 Difference]: Without dead ends: 198 [2022-01-31 18:01:20,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 18:01:20,808 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 188 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:20,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 42 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:01:20,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-31 18:01:20,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2022-01-31 18:01:20,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 189 states have (on average 1.0158730158730158) internal successors, (192), 189 states have internal predecessors, (192), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:01:20,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2022-01-31 18:01:20,854 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 190 [2022-01-31 18:01:20,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:20,854 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2022-01-31 18:01:20,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0919540229885056) internal successors, (182), 86 states have internal predecessors, (182), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:20,854 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2022-01-31 18:01:20,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 18:01:20,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:20,855 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:20,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 18:01:20,855 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:20,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:20,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1603523454, now seen corresponding path program 84 times [2022-01-31 18:01:20,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:20,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152714356] [2022-01-31 18:01:20,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:20,856 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:20,856 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:20,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:20,874 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:23,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:23,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-01-31 18:01:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:23,093 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:23,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152714356] [2022-01-31 18:01:23,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [152714356] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:23,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:23,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 18:01:23,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853419479] [2022-01-31 18:01:23,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:23,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 18:01:23,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:23,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 18:01:23,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 18:01:23,096 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand has 88 states, 88 states have (on average 2.090909090909091) internal successors, (184), 87 states have internal predecessors, (184), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:25,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:25,995 INFO L93 Difference]: Finished difference Result 222 states and 226 transitions. [2022-01-31 18:01:25,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 18:01:25,996 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.090909090909091) internal successors, (184), 87 states have internal predecessors, (184), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 192 [2022-01-31 18:01:25,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:25,998 INFO L225 Difference]: With dead ends: 222 [2022-01-31 18:01:25,998 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 18:01:26,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 18:01:26,001 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 190 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:26,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 77 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:01:26,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 18:01:26,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2022-01-31 18:01:26,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 191 states have (on average 1.0157068062827226) internal successors, (194), 191 states have internal predecessors, (194), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:01:26,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2022-01-31 18:01:26,077 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 192 [2022-01-31 18:01:26,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:26,077 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2022-01-31 18:01:26,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.090909090909091) internal successors, (184), 87 states have internal predecessors, (184), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:26,077 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2022-01-31 18:01:26,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-31 18:01:26,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:26,078 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:26,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 18:01:26,078 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:26,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:26,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1793761632, now seen corresponding path program 85 times [2022-01-31 18:01:26,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:26,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867991950] [2022-01-31 18:01:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:26,080 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:26,080 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:26,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:26,096 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:28,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:28,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-01-31 18:01:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:28,477 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:28,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867991950] [2022-01-31 18:01:28,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [867991950] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:28,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:28,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 18:01:28,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761837298] [2022-01-31 18:01:28,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:28,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 18:01:28,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:28,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 18:01:28,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:01:28,480 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand has 89 states, 89 states have (on average 2.0898876404494384) internal successors, (186), 88 states have internal predecessors, (186), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:31,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:31,468 INFO L93 Difference]: Finished difference Result 224 states and 228 transitions. [2022-01-31 18:01:31,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 18:01:31,469 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0898876404494384) internal successors, (186), 88 states have internal predecessors, (186), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 194 [2022-01-31 18:01:31,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:31,469 INFO L225 Difference]: With dead ends: 224 [2022-01-31 18:01:31,470 INFO L226 Difference]: Without dead ends: 202 [2022-01-31 18:01:31,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 18:01:31,472 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 192 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:31,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 62 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:01:31,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-31 18:01:31,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2022-01-31 18:01:31,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 193 states have internal predecessors, (196), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:01:31,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2022-01-31 18:01:31,541 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 194 [2022-01-31 18:01:31,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:31,541 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2022-01-31 18:01:31,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.0898876404494384) internal successors, (186), 88 states have internal predecessors, (186), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:31,542 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2022-01-31 18:01:31,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-31 18:01:31,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:31,542 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:31,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 18:01:31,542 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:31,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:31,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1885382978, now seen corresponding path program 86 times [2022-01-31 18:01:31,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:31,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405365854] [2022-01-31 18:01:31,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:31,544 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:31,544 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:31,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:31,557 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:33,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:33,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2022-01-31 18:01:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:33,992 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:33,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405365854] [2022-01-31 18:01:33,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1405365854] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:33,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:33,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 18:01:33,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101986684] [2022-01-31 18:01:33,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:33,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 18:01:33,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:33,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 18:01:33,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 18:01:33,995 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand has 90 states, 90 states have (on average 2.088888888888889) internal successors, (188), 89 states have internal predecessors, (188), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:37,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:37,114 INFO L93 Difference]: Finished difference Result 226 states and 230 transitions. [2022-01-31 18:01:37,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 18:01:37,114 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.088888888888889) internal successors, (188), 89 states have internal predecessors, (188), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 196 [2022-01-31 18:01:37,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:37,115 INFO L225 Difference]: With dead ends: 226 [2022-01-31 18:01:37,115 INFO L226 Difference]: Without dead ends: 204 [2022-01-31 18:01:37,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 18:01:37,116 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 194 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:37,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 67 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:01:37,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-01-31 18:01:37,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2022-01-31 18:01:37,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 195 states have (on average 1.0153846153846153) internal successors, (198), 195 states have internal predecessors, (198), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:01:37,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2022-01-31 18:01:37,166 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 196 [2022-01-31 18:01:37,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:37,166 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2022-01-31 18:01:37,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.088888888888889) internal successors, (188), 89 states have internal predecessors, (188), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:37,166 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2022-01-31 18:01:37,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-01-31 18:01:37,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:37,167 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:37,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 18:01:37,167 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:37,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:37,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1509698716, now seen corresponding path program 87 times [2022-01-31 18:01:37,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:37,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28487626] [2022-01-31 18:01:37,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:37,168 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:37,169 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:37,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:37,181 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:39,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:39,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-01-31 18:01:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:39,668 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:39,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28487626] [2022-01-31 18:01:39,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [28487626] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:39,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:39,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 18:01:39,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254225169] [2022-01-31 18:01:39,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:39,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 18:01:39,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:39,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 18:01:39,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 18:01:39,670 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand has 91 states, 91 states have (on average 2.087912087912088) internal successors, (190), 90 states have internal predecessors, (190), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:42,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:42,803 INFO L93 Difference]: Finished difference Result 228 states and 232 transitions. [2022-01-31 18:01:42,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 18:01:42,804 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.087912087912088) internal successors, (190), 90 states have internal predecessors, (190), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 198 [2022-01-31 18:01:42,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:42,805 INFO L225 Difference]: With dead ends: 228 [2022-01-31 18:01:42,805 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 18:01:42,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 18:01:42,806 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 196 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:42,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 52 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:01:42,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 18:01:42,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2022-01-31 18:01:42,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 197 states have (on average 1.015228426395939) internal successors, (200), 197 states have internal predecessors, (200), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:01:42,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2022-01-31 18:01:42,856 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 198 [2022-01-31 18:01:42,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:42,857 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2022-01-31 18:01:42,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.087912087912088) internal successors, (190), 90 states have internal predecessors, (190), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:42,857 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2022-01-31 18:01:42,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-31 18:01:42,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:42,857 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:42,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 18:01:42,858 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:42,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:42,858 INFO L85 PathProgramCache]: Analyzing trace with hash -8061690, now seen corresponding path program 88 times [2022-01-31 18:01:42,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:42,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918942858] [2022-01-31 18:01:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:42,859 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:42,860 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:42,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:42,873 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:45,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:45,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-01-31 18:01:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:45,393 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:45,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918942858] [2022-01-31 18:01:45,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1918942858] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:45,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:45,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 18:01:45,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661159505] [2022-01-31 18:01:45,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:45,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 18:01:45,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:45,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 18:01:45,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 18:01:45,395 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand has 92 states, 92 states have (on average 2.0869565217391304) internal successors, (192), 91 states have internal predecessors, (192), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:48,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:48,350 INFO L93 Difference]: Finished difference Result 230 states and 234 transitions. [2022-01-31 18:01:48,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 18:01:48,351 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0869565217391304) internal successors, (192), 91 states have internal predecessors, (192), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 200 [2022-01-31 18:01:48,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:48,351 INFO L225 Difference]: With dead ends: 230 [2022-01-31 18:01:48,351 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 18:01:48,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 18:01:48,353 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 198 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:48,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 52 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:01:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 18:01:48,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2022-01-31 18:01:48,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 199 states have (on average 1.015075376884422) internal successors, (202), 199 states have internal predecessors, (202), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:01:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2022-01-31 18:01:48,411 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 200 [2022-01-31 18:01:48,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:48,411 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2022-01-31 18:01:48,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0869565217391304) internal successors, (192), 91 states have internal predecessors, (192), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:48,411 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2022-01-31 18:01:48,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-31 18:01:48,412 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:48,412 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:48,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 18:01:48,412 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:48,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:48,412 INFO L85 PathProgramCache]: Analyzing trace with hash -43891160, now seen corresponding path program 89 times [2022-01-31 18:01:48,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:48,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997899160] [2022-01-31 18:01:48,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:48,414 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:48,414 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:48,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:48,426 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:50,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:50,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2022-01-31 18:01:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:50,840 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:50,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997899160] [2022-01-31 18:01:50,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [997899160] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:50,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:50,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 18:01:50,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088932592] [2022-01-31 18:01:50,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:50,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 18:01:50,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:50,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 18:01:50,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 18:01:50,843 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand has 93 states, 93 states have (on average 2.086021505376344) internal successors, (194), 92 states have internal predecessors, (194), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:53,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:53,912 INFO L93 Difference]: Finished difference Result 232 states and 236 transitions. [2022-01-31 18:01:53,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 18:01:53,913 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.086021505376344) internal successors, (194), 92 states have internal predecessors, (194), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 202 [2022-01-31 18:01:53,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:53,913 INFO L225 Difference]: With dead ends: 232 [2022-01-31 18:01:53,913 INFO L226 Difference]: Without dead ends: 210 [2022-01-31 18:01:53,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 18:01:53,916 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 200 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:53,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 52 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:01:53,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-01-31 18:01:53,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2022-01-31 18:01:53,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 201 states have (on average 1.0149253731343284) internal successors, (204), 201 states have internal predecessors, (204), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:01:53,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2022-01-31 18:01:53,977 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 202 [2022-01-31 18:01:53,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:53,977 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2022-01-31 18:01:53,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.086021505376344) internal successors, (194), 92 states have internal predecessors, (194), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:53,977 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2022-01-31 18:01:53,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-31 18:01:53,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:53,977 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:53,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 18:01:53,978 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:53,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:53,978 INFO L85 PathProgramCache]: Analyzing trace with hash -116273462, now seen corresponding path program 90 times [2022-01-31 18:01:53,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:53,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42373777] [2022-01-31 18:01:53,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:53,979 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:53,979 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:53,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:01:53,993 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:01:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:56,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:01:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:56,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-01-31 18:01:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:01:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:01:56,605 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:01:56,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42373777] [2022-01-31 18:01:56,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [42373777] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:01:56,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:01:56,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 18:01:56,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947582048] [2022-01-31 18:01:56,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:01:56,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 18:01:56,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:01:56,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 18:01:56,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 18:01:56,608 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:59,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:01:59,904 INFO L93 Difference]: Finished difference Result 234 states and 238 transitions. [2022-01-31 18:01:59,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 18:01:59,905 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 204 [2022-01-31 18:01:59,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:01:59,906 INFO L225 Difference]: With dead ends: 234 [2022-01-31 18:01:59,906 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 18:01:59,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 18:01:59,908 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 202 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:01:59,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 57 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:01:59,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 18:01:59,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2022-01-31 18:01:59,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 203 states have (on average 1.0147783251231528) internal successors, (206), 203 states have internal predecessors, (206), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:01:59,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2022-01-31 18:01:59,981 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 204 [2022-01-31 18:01:59,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:01:59,981 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2022-01-31 18:01:59,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:01:59,981 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2022-01-31 18:01:59,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-31 18:01:59,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:01:59,982 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:01:59,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 18:01:59,982 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:01:59,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:01:59,982 INFO L85 PathProgramCache]: Analyzing trace with hash -956188948, now seen corresponding path program 91 times [2022-01-31 18:01:59,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:01:59,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858884905] [2022-01-31 18:01:59,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:01:59,984 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:01:59,984 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:01:59,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:00,004 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:02,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:02,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-01-31 18:02:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:02,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:02,687 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:02,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858884905] [2022-01-31 18:02:02,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [858884905] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:02,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:02,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 18:02:02,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19032052] [2022-01-31 18:02:02,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:02,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 18:02:02,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:02,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 18:02:02,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 18:02:02,690 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand has 95 states, 95 states have (on average 2.0842105263157893) internal successors, (198), 94 states have internal predecessors, (198), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:06,002 INFO L93 Difference]: Finished difference Result 236 states and 240 transitions. [2022-01-31 18:02:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 18:02:06,002 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0842105263157893) internal successors, (198), 94 states have internal predecessors, (198), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 206 [2022-01-31 18:02:06,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:06,003 INFO L225 Difference]: With dead ends: 236 [2022-01-31 18:02:06,003 INFO L226 Difference]: Without dead ends: 214 [2022-01-31 18:02:06,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 18:02:06,005 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 204 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:06,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 37 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:02:06,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-31 18:02:06,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2022-01-31 18:02:06,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 205 states have (on average 1.0146341463414634) internal successors, (208), 205 states have internal predecessors, (208), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:02:06,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2022-01-31 18:02:06,059 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 206 [2022-01-31 18:02:06,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:06,059 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2022-01-31 18:02:06,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0842105263157893) internal successors, (198), 94 states have internal predecessors, (198), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:06,059 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2022-01-31 18:02:06,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-01-31 18:02:06,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:06,060 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:06,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 18:02:06,060 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:06,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:06,060 INFO L85 PathProgramCache]: Analyzing trace with hash -661119346, now seen corresponding path program 92 times [2022-01-31 18:02:06,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:06,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309668047] [2022-01-31 18:02:06,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:06,061 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:06,062 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:06,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:06,077 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:08,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:08,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-01-31 18:02:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:08,810 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:08,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309668047] [2022-01-31 18:02:08,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [309668047] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:08,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:08,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 18:02:08,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841149896] [2022-01-31 18:02:08,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:08,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 18:02:08,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:08,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 18:02:08,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 18:02:08,813 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand has 96 states, 96 states have (on average 2.0833333333333335) internal successors, (200), 95 states have internal predecessors, (200), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:12,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:12,215 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2022-01-31 18:02:12,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 18:02:12,216 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0833333333333335) internal successors, (200), 95 states have internal predecessors, (200), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 208 [2022-01-31 18:02:12,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:12,217 INFO L225 Difference]: With dead ends: 238 [2022-01-31 18:02:12,217 INFO L226 Difference]: Without dead ends: 216 [2022-01-31 18:02:12,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 18:02:12,221 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 206 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:12,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 52 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:02:12,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-01-31 18:02:12,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2022-01-31 18:02:12,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 207 states have (on average 1.0144927536231885) internal successors, (210), 207 states have internal predecessors, (210), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:02:12,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2022-01-31 18:02:12,289 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 208 [2022-01-31 18:02:12,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:12,290 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2022-01-31 18:02:12,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0833333333333335) internal successors, (200), 95 states have internal predecessors, (200), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:12,290 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2022-01-31 18:02:12,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 18:02:12,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:12,290 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:12,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 18:02:12,291 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:12,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:12,291 INFO L85 PathProgramCache]: Analyzing trace with hash -567073360, now seen corresponding path program 93 times [2022-01-31 18:02:12,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:12,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396864102] [2022-01-31 18:02:12,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:12,293 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:12,294 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:12,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:12,309 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:12,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:15,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:15,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-01-31 18:02:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:15,085 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:15,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396864102] [2022-01-31 18:02:15,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [396864102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:15,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:15,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 18:02:15,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865089174] [2022-01-31 18:02:15,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:15,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 18:02:15,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:15,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 18:02:15,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 18:02:15,087 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 96 states have internal predecessors, (202), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:18,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:18,517 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2022-01-31 18:02:18,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 18:02:18,517 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 96 states have internal predecessors, (202), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 210 [2022-01-31 18:02:18,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:18,518 INFO L225 Difference]: With dead ends: 240 [2022-01-31 18:02:18,518 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 18:02:18,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 18:02:18,520 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 208 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:18,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 57 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:02:18,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 18:02:18,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2022-01-31 18:02:18,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 209 states have (on average 1.014354066985646) internal successors, (212), 209 states have internal predecessors, (212), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:02:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2022-01-31 18:02:18,575 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 210 [2022-01-31 18:02:18,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:18,575 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2022-01-31 18:02:18,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 96 states have internal predecessors, (202), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2022-01-31 18:02:18,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-01-31 18:02:18,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:18,576 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:18,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 18:02:18,576 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:18,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:18,577 INFO L85 PathProgramCache]: Analyzing trace with hash -383194030, now seen corresponding path program 94 times [2022-01-31 18:02:18,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:18,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574440872] [2022-01-31 18:02:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:18,578 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:18,578 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:18,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:18,592 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:21,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:21,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-01-31 18:02:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:21,317 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:21,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574440872] [2022-01-31 18:02:21,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1574440872] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:21,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:21,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 18:02:21,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281410970] [2022-01-31 18:02:21,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:21,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 18:02:21,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:21,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 18:02:21,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 18:02:21,320 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:24,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:24,729 INFO L93 Difference]: Finished difference Result 242 states and 246 transitions. [2022-01-31 18:02:24,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 18:02:24,729 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 212 [2022-01-31 18:02:24,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:24,730 INFO L225 Difference]: With dead ends: 242 [2022-01-31 18:02:24,730 INFO L226 Difference]: Without dead ends: 220 [2022-01-31 18:02:24,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 18:02:24,731 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 210 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:24,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 52 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:02:24,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-31 18:02:24,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2022-01-31 18:02:24,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 211 states have (on average 1.014218009478673) internal successors, (214), 211 states have internal predecessors, (214), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:02:24,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 221 transitions. [2022-01-31 18:02:24,787 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 221 transitions. Word has length 212 [2022-01-31 18:02:24,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:24,787 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 221 transitions. [2022-01-31 18:02:24,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:24,788 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 221 transitions. [2022-01-31 18:02:24,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 18:02:24,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:24,788 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:24,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 18:02:24,788 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:24,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:24,789 INFO L85 PathProgramCache]: Analyzing trace with hash 231182964, now seen corresponding path program 95 times [2022-01-31 18:02:24,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:24,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610146138] [2022-01-31 18:02:24,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:24,790 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:24,790 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:24,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:24,806 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:27,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:27,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-01-31 18:02:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:27,719 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:27,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610146138] [2022-01-31 18:02:27,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [610146138] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:27,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:27,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 18:02:27,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10929492] [2022-01-31 18:02:27,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:27,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 18:02:27,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:27,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 18:02:27,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 18:02:27,722 INFO L87 Difference]: Start difference. First operand 219 states and 221 transitions. Second operand has 99 states, 99 states have (on average 2.080808080808081) internal successors, (206), 98 states have internal predecessors, (206), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:31,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:31,383 INFO L93 Difference]: Finished difference Result 244 states and 248 transitions. [2022-01-31 18:02:31,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 18:02:31,383 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.080808080808081) internal successors, (206), 98 states have internal predecessors, (206), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 214 [2022-01-31 18:02:31,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:31,384 INFO L225 Difference]: With dead ends: 244 [2022-01-31 18:02:31,384 INFO L226 Difference]: Without dead ends: 222 [2022-01-31 18:02:31,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 18:02:31,387 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 212 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:31,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 52 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:02:31,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-01-31 18:02:31,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2022-01-31 18:02:31,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 213 states have (on average 1.0140845070422535) internal successors, (216), 213 states have internal predecessors, (216), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:02:31,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2022-01-31 18:02:31,445 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 214 [2022-01-31 18:02:31,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:31,445 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2022-01-31 18:02:31,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.080808080808081) internal successors, (206), 98 states have internal predecessors, (206), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:31,446 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2022-01-31 18:02:31,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-31 18:02:31,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:31,446 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:31,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 18:02:31,446 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:31,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:31,447 INFO L85 PathProgramCache]: Analyzing trace with hash -2058012650, now seen corresponding path program 96 times [2022-01-31 18:02:31,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:31,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237667788] [2022-01-31 18:02:31,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:31,448 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:31,448 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:31,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:31,465 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:34,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:34,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-01-31 18:02:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:34,450 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:34,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237667788] [2022-01-31 18:02:34,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [237667788] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:34,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:34,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 18:02:34,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458136164] [2022-01-31 18:02:34,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:34,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 18:02:34,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:34,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 18:02:34,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 18:02:34,453 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand has 100 states, 100 states have (on average 2.08) internal successors, (208), 99 states have internal predecessors, (208), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:38,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:38,170 INFO L93 Difference]: Finished difference Result 246 states and 250 transitions. [2022-01-31 18:02:38,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 18:02:38,170 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.08) internal successors, (208), 99 states have internal predecessors, (208), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 216 [2022-01-31 18:02:38,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:38,171 INFO L225 Difference]: With dead ends: 246 [2022-01-31 18:02:38,171 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 18:02:38,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 18:02:38,173 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 214 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:38,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 62 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:02:38,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 18:02:38,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2022-01-31 18:02:38,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 215 states have (on average 1.013953488372093) internal successors, (218), 215 states have internal predecessors, (218), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:02:38,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2022-01-31 18:02:38,232 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 216 [2022-01-31 18:02:38,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:38,233 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2022-01-31 18:02:38,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.08) internal successors, (208), 99 states have internal predecessors, (208), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:38,233 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2022-01-31 18:02:38,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-31 18:02:38,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:38,233 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:38,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 18:02:38,234 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:38,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:38,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1343225144, now seen corresponding path program 97 times [2022-01-31 18:02:38,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:38,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429340483] [2022-01-31 18:02:38,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:38,235 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:38,235 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:38,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:38,251 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:41,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:41,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2022-01-31 18:02:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:41,138 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:41,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429340483] [2022-01-31 18:02:41,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [429340483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:41,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:41,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 18:02:41,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050445785] [2022-01-31 18:02:41,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:41,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 18:02:41,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:41,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 18:02:41,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 18:02:41,140 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand has 101 states, 101 states have (on average 2.0792079207920793) internal successors, (210), 100 states have internal predecessors, (210), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:44,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:44,661 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2022-01-31 18:02:44,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 18:02:44,661 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0792079207920793) internal successors, (210), 100 states have internal predecessors, (210), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 218 [2022-01-31 18:02:44,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:44,662 INFO L225 Difference]: With dead ends: 248 [2022-01-31 18:02:44,662 INFO L226 Difference]: Without dead ends: 226 [2022-01-31 18:02:44,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 18:02:44,665 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 216 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:44,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 42 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:02:44,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-31 18:02:44,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2022-01-31 18:02:44,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 217 states have (on average 1.0138248847926268) internal successors, (220), 217 states have internal predecessors, (220), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:02:44,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2022-01-31 18:02:44,767 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 218 [2022-01-31 18:02:44,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:44,767 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2022-01-31 18:02:44,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0792079207920793) internal successors, (210), 100 states have internal predecessors, (210), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:44,767 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2022-01-31 18:02:44,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-01-31 18:02:44,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:44,770 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:44,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 18:02:44,770 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:44,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:44,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1462632922, now seen corresponding path program 98 times [2022-01-31 18:02:44,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:44,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550266917] [2022-01-31 18:02:44,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:44,772 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:44,772 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:44,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:44,791 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:47,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:47,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-01-31 18:02:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:47,837 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:47,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550266917] [2022-01-31 18:02:47,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [550266917] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:47,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:47,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 18:02:47,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800991902] [2022-01-31 18:02:47,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:47,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 18:02:47,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:47,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 18:02:47,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 18:02:47,840 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand has 102 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 101 states have internal predecessors, (212), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:51,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:51,661 INFO L93 Difference]: Finished difference Result 250 states and 254 transitions. [2022-01-31 18:02:51,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 18:02:51,662 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 101 states have internal predecessors, (212), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 220 [2022-01-31 18:02:51,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:51,663 INFO L225 Difference]: With dead ends: 250 [2022-01-31 18:02:51,663 INFO L226 Difference]: Without dead ends: 228 [2022-01-31 18:02:51,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 18:02:51,665 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 218 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:51,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 52 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:02:51,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-01-31 18:02:51,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2022-01-31 18:02:51,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 219 states have (on average 1.0136986301369864) internal successors, (222), 219 states have internal predecessors, (222), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:02:51,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2022-01-31 18:02:51,727 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 220 [2022-01-31 18:02:51,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:51,727 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2022-01-31 18:02:51,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 101 states have internal predecessors, (212), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:51,727 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2022-01-31 18:02:51,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-01-31 18:02:51,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:51,728 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:51,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 18:02:51,728 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:51,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:51,728 INFO L85 PathProgramCache]: Analyzing trace with hash 249390588, now seen corresponding path program 99 times [2022-01-31 18:02:51,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:51,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046960466] [2022-01-31 18:02:51,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:51,730 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:51,730 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:51,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:51,756 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:54,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:02:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:54,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-01-31 18:02:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:02:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:02:54,866 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:02:54,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046960466] [2022-01-31 18:02:54,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1046960466] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:02:54,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:02:54,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 18:02:54,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144111525] [2022-01-31 18:02:54,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:02:54,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 18:02:54,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:02:54,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 18:02:54,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 18:02:54,885 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand has 103 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 102 states have internal predecessors, (214), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:58,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:02:58,754 INFO L93 Difference]: Finished difference Result 252 states and 256 transitions. [2022-01-31 18:02:58,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 18:02:58,755 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 102 states have internal predecessors, (214), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 222 [2022-01-31 18:02:58,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:02:58,755 INFO L225 Difference]: With dead ends: 252 [2022-01-31 18:02:58,755 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 18:02:58,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 18:02:58,757 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 220 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:02:58,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 47 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:02:58,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 18:02:58,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2022-01-31 18:02:58,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 221 states have (on average 1.0135746606334841) internal successors, (224), 221 states have internal predecessors, (224), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:02:58,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2022-01-31 18:02:58,821 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 222 [2022-01-31 18:02:58,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:02:58,821 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2022-01-31 18:02:58,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 102 states have internal predecessors, (214), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:02:58,821 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2022-01-31 18:02:58,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-31 18:02:58,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:02:58,822 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:02:58,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 18:02:58,822 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:02:58,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:02:58,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1740355170, now seen corresponding path program 100 times [2022-01-31 18:02:58,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:02:58,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028884505] [2022-01-31 18:02:58,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:02:58,823 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:02:58,823 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:02:58,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:02:58,842 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:02:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:01,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:01,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-01-31 18:03:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:01,987 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:01,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028884505] [2022-01-31 18:03:01,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2028884505] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:01,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:01,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 18:03:01,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379682286] [2022-01-31 18:03:01,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:01,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 18:03:01,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:01,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 18:03:01,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 18:03:01,990 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand has 104 states, 104 states have (on average 2.076923076923077) internal successors, (216), 103 states have internal predecessors, (216), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:03:05,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:05,705 INFO L93 Difference]: Finished difference Result 254 states and 258 transitions. [2022-01-31 18:03:05,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 18:03:05,705 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.076923076923077) internal successors, (216), 103 states have internal predecessors, (216), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 224 [2022-01-31 18:03:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:05,706 INFO L225 Difference]: With dead ends: 254 [2022-01-31 18:03:05,706 INFO L226 Difference]: Without dead ends: 232 [2022-01-31 18:03:05,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 18:03:05,708 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 222 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:05,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 82 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:03:05,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-01-31 18:03:05,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2022-01-31 18:03:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 223 states have (on average 1.0134529147982063) internal successors, (226), 223 states have internal predecessors, (226), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:03:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2022-01-31 18:03:05,771 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 224 [2022-01-31 18:03:05,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:05,771 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2022-01-31 18:03:05,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.076923076923077) internal successors, (216), 103 states have internal predecessors, (216), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:03:05,772 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2022-01-31 18:03:05,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-01-31 18:03:05,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:05,772 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:05,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 18:03:05,772 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:05,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:05,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1669385408, now seen corresponding path program 101 times [2022-01-31 18:03:05,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:05,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735514011] [2022-01-31 18:03:05,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:05,774 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:05,774 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:05,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:05,790 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:09,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:09,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2022-01-31 18:03:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:09,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:09,038 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:09,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735514011] [2022-01-31 18:03:09,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [735514011] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:09,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:09,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 18:03:09,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563376104] [2022-01-31 18:03:09,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:09,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 18:03:09,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:09,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 18:03:09,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 18:03:09,042 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand has 105 states, 105 states have (on average 2.0761904761904764) internal successors, (218), 104 states have internal predecessors, (218), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:03:13,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:13,032 INFO L93 Difference]: Finished difference Result 256 states and 260 transitions. [2022-01-31 18:03:13,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 18:03:13,033 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0761904761904764) internal successors, (218), 104 states have internal predecessors, (218), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 226 [2022-01-31 18:03:13,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:13,033 INFO L225 Difference]: With dead ends: 256 [2022-01-31 18:03:13,033 INFO L226 Difference]: Without dead ends: 234 [2022-01-31 18:03:13,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 18:03:13,035 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 224 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:13,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 42 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:03:13,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-31 18:03:13,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2022-01-31 18:03:13,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 225 states have (on average 1.0133333333333334) internal successors, (228), 225 states have internal predecessors, (228), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:03:13,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2022-01-31 18:03:13,100 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 226 [2022-01-31 18:03:13,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:13,101 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2022-01-31 18:03:13,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0761904761904764) internal successors, (218), 104 states have internal predecessors, (218), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:03:13,101 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2022-01-31 18:03:13,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-01-31 18:03:13,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:13,101 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:13,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 18:03:13,102 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:13,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:13,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1370034018, now seen corresponding path program 102 times [2022-01-31 18:03:13,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:13,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407868379] [2022-01-31 18:03:13,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:13,103 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:13,103 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:13,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:13,120 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:16,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:16,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:16,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-01-31 18:03:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:16,284 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:16,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407868379] [2022-01-31 18:03:16,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1407868379] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:16,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:16,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 18:03:16,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351715353] [2022-01-31 18:03:16,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:16,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 18:03:16,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:16,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 18:03:16,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 18:03:16,288 INFO L87 Difference]: Start difference. First operand 233 states and 235 transitions. Second operand has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:03:20,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:20,356 INFO L93 Difference]: Finished difference Result 258 states and 262 transitions. [2022-01-31 18:03:20,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 18:03:20,356 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 228 [2022-01-31 18:03:20,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:20,357 INFO L225 Difference]: With dead ends: 258 [2022-01-31 18:03:20,357 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 18:03:20,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 18:03:20,359 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 226 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:20,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 72 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:03:20,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 18:03:20,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2022-01-31 18:03:20,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 227 states have (on average 1.013215859030837) internal successors, (230), 227 states have internal predecessors, (230), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:03:20,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2022-01-31 18:03:20,425 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 228 [2022-01-31 18:03:20,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:20,425 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2022-01-31 18:03:20,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:03:20,425 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2022-01-31 18:03:20,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 18:03:20,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:20,425 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:20,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 18:03:20,426 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:20,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:20,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1456157060, now seen corresponding path program 103 times [2022-01-31 18:03:20,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:20,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592659696] [2022-01-31 18:03:20,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:20,429 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:20,429 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:20,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:20,445 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:23,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:23,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2022-01-31 18:03:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:23,739 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:23,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592659696] [2022-01-31 18:03:23,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [592659696] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:23,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:23,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 18:03:23,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467414427] [2022-01-31 18:03:23,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:23,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 18:03:23,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:23,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 18:03:23,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 18:03:23,742 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand has 107 states, 107 states have (on average 2.074766355140187) internal successors, (222), 106 states have internal predecessors, (222), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:03:27,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:27,780 INFO L93 Difference]: Finished difference Result 260 states and 264 transitions. [2022-01-31 18:03:27,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 18:03:27,780 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.074766355140187) internal successors, (222), 106 states have internal predecessors, (222), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 230 [2022-01-31 18:03:27,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:27,781 INFO L225 Difference]: With dead ends: 260 [2022-01-31 18:03:27,781 INFO L226 Difference]: Without dead ends: 238 [2022-01-31 18:03:27,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 18:03:27,783 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 228 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:27,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 37 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:03:27,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-31 18:03:27,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2022-01-31 18:03:27,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 229 states have (on average 1.0131004366812226) internal successors, (232), 229 states have internal predecessors, (232), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:03:27,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 239 transitions. [2022-01-31 18:03:27,854 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 239 transitions. Word has length 230 [2022-01-31 18:03:27,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:27,854 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 239 transitions. [2022-01-31 18:03:27,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.074766355140187) internal successors, (222), 106 states have internal predecessors, (222), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:03:27,854 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 239 transitions. [2022-01-31 18:03:27,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-01-31 18:03:27,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:27,855 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:27,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 18:03:27,855 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:27,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:27,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1678945498, now seen corresponding path program 104 times [2022-01-31 18:03:27,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:27,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595326429] [2022-01-31 18:03:27,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:27,857 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:27,857 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:27,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:27,873 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:31,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:31,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-01-31 18:03:31,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:31,224 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:31,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595326429] [2022-01-31 18:03:31,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [595326429] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:31,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:31,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 18:03:31,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002998318] [2022-01-31 18:03:31,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:31,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 18:03:31,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:31,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 18:03:31,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 18:03:31,227 INFO L87 Difference]: Start difference. First operand 237 states and 239 transitions. Second operand has 108 states, 108 states have (on average 2.074074074074074) internal successors, (224), 107 states have internal predecessors, (224), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:03:35,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:35,266 INFO L93 Difference]: Finished difference Result 262 states and 266 transitions. [2022-01-31 18:03:35,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 18:03:35,266 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.074074074074074) internal successors, (224), 107 states have internal predecessors, (224), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 232 [2022-01-31 18:03:35,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:35,266 INFO L225 Difference]: With dead ends: 262 [2022-01-31 18:03:35,266 INFO L226 Difference]: Without dead ends: 240 [2022-01-31 18:03:35,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 18:03:35,269 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 230 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:35,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 57 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:03:35,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-31 18:03:35,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2022-01-31 18:03:35,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 231 states have (on average 1.0129870129870129) internal successors, (234), 231 states have internal predecessors, (234), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:03:35,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 241 transitions. [2022-01-31 18:03:35,339 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 241 transitions. Word has length 232 [2022-01-31 18:03:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:35,339 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 241 transitions. [2022-01-31 18:03:35,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.074074074074074) internal successors, (224), 107 states have internal predecessors, (224), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:03:35,340 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 241 transitions. [2022-01-31 18:03:35,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-31 18:03:35,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:35,340 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:35,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 18:03:35,340 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:35,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:35,340 INFO L85 PathProgramCache]: Analyzing trace with hash 554538056, now seen corresponding path program 105 times [2022-01-31 18:03:35,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:35,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000338379] [2022-01-31 18:03:35,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:35,342 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:35,342 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:35,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:35,358 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:38,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:38,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-01-31 18:03:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:38,696 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:38,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000338379] [2022-01-31 18:03:38,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2000338379] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:38,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:38,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 18:03:38,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485242075] [2022-01-31 18:03:38,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:38,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 18:03:38,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:38,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 18:03:38,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 18:03:38,699 INFO L87 Difference]: Start difference. First operand 239 states and 241 transitions. Second operand has 109 states, 109 states have (on average 2.073394495412844) internal successors, (226), 108 states have internal predecessors, (226), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:03:42,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:42,753 INFO L93 Difference]: Finished difference Result 264 states and 268 transitions. [2022-01-31 18:03:42,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 18:03:42,754 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.073394495412844) internal successors, (226), 108 states have internal predecessors, (226), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 234 [2022-01-31 18:03:42,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:42,754 INFO L225 Difference]: With dead ends: 264 [2022-01-31 18:03:42,754 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 18:03:42,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 18:03:42,757 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 232 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:42,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 37 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:03:42,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 18:03:42,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2022-01-31 18:03:42,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 233 states have (on average 1.0128755364806867) internal successors, (236), 233 states have internal predecessors, (236), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:03:42,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 243 transitions. [2022-01-31 18:03:42,826 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 243 transitions. Word has length 234 [2022-01-31 18:03:42,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:42,826 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 243 transitions. [2022-01-31 18:03:42,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.073394495412844) internal successors, (226), 108 states have internal predecessors, (226), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:03:42,826 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 243 transitions. [2022-01-31 18:03:42,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-01-31 18:03:42,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:42,827 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:42,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 18:03:42,827 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:42,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:42,827 INFO L85 PathProgramCache]: Analyzing trace with hash -551414550, now seen corresponding path program 106 times [2022-01-31 18:03:42,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:42,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271888274] [2022-01-31 18:03:42,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:42,829 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:42,829 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:42,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:42,846 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:46,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:46,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2022-01-31 18:03:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:46,234 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:46,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271888274] [2022-01-31 18:03:46,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [271888274] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:46,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:46,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 18:03:46,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611729181] [2022-01-31 18:03:46,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:46,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 18:03:46,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:46,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 18:03:46,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 18:03:46,236 INFO L87 Difference]: Start difference. First operand 241 states and 243 transitions. Second operand has 110 states, 110 states have (on average 2.0727272727272728) internal successors, (228), 109 states have internal predecessors, (228), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:03:50,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:50,354 INFO L93 Difference]: Finished difference Result 266 states and 270 transitions. [2022-01-31 18:03:50,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 18:03:50,354 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0727272727272728) internal successors, (228), 109 states have internal predecessors, (228), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 236 [2022-01-31 18:03:50,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:50,355 INFO L225 Difference]: With dead ends: 266 [2022-01-31 18:03:50,355 INFO L226 Difference]: Without dead ends: 244 [2022-01-31 18:03:50,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 18:03:50,358 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 234 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:50,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 37 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:03:50,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-31 18:03:50,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2022-01-31 18:03:50,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 235 states have (on average 1.0127659574468084) internal successors, (238), 235 states have internal predecessors, (238), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:03:50,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 245 transitions. [2022-01-31 18:03:50,444 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 245 transitions. Word has length 236 [2022-01-31 18:03:50,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:50,444 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 245 transitions. [2022-01-31 18:03:50,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0727272727272728) internal successors, (228), 109 states have internal predecessors, (228), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:03:50,444 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 245 transitions. [2022-01-31 18:03:50,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-01-31 18:03:50,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:50,445 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:50,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 18:03:50,445 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:50,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:50,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1780020492, now seen corresponding path program 107 times [2022-01-31 18:03:50,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:50,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672196990] [2022-01-31 18:03:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:50,446 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:50,446 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:50,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:50,466 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:53,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:03:53,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:53,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2022-01-31 18:03:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:03:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:03:53,903 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:03:53,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672196990] [2022-01-31 18:03:53,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1672196990] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:03:53,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:03:53,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 18:03:53,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937158573] [2022-01-31 18:03:53,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:03:53,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 18:03:53,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:03:53,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 18:03:53,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 18:03:53,905 INFO L87 Difference]: Start difference. First operand 243 states and 245 transitions. Second operand has 111 states, 111 states have (on average 2.0720720720720722) internal successors, (230), 110 states have internal predecessors, (230), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:03:58,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:03:58,068 INFO L93 Difference]: Finished difference Result 268 states and 272 transitions. [2022-01-31 18:03:58,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 18:03:58,069 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.0720720720720722) internal successors, (230), 110 states have internal predecessors, (230), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 238 [2022-01-31 18:03:58,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:03:58,069 INFO L225 Difference]: With dead ends: 268 [2022-01-31 18:03:58,069 INFO L226 Difference]: Without dead ends: 246 [2022-01-31 18:03:58,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 18:03:58,073 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 236 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:03:58,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 42 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:03:58,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-01-31 18:03:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2022-01-31 18:03:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 237 states have (on average 1.0126582278481013) internal successors, (240), 237 states have internal predecessors, (240), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:03:58,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2022-01-31 18:03:58,156 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 238 [2022-01-31 18:03:58,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:03:58,156 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2022-01-31 18:03:58,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.0720720720720722) internal successors, (230), 110 states have internal predecessors, (230), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:03:58,157 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2022-01-31 18:03:58,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-01-31 18:03:58,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:03:58,157 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:03:58,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 18:03:58,157 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:03:58,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:03:58,157 INFO L85 PathProgramCache]: Analyzing trace with hash 316167342, now seen corresponding path program 108 times [2022-01-31 18:03:58,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:03:58,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733074484] [2022-01-31 18:03:58,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:03:58,159 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:03:58,159 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:03:58,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:03:58,175 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:03:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:01,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:01,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-01-31 18:04:01,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:04:01,609 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:01,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733074484] [2022-01-31 18:04:01,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [733074484] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:01,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:01,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 18:04:01,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712149462] [2022-01-31 18:04:01,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:01,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 18:04:01,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:01,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 18:04:01,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 18:04:01,612 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand has 112 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 111 states have internal predecessors, (232), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:04:05,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:05,891 INFO L93 Difference]: Finished difference Result 270 states and 274 transitions. [2022-01-31 18:04:05,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 18:04:05,891 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 111 states have internal predecessors, (232), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 240 [2022-01-31 18:04:05,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:05,892 INFO L225 Difference]: With dead ends: 270 [2022-01-31 18:04:05,892 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 18:04:05,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 18:04:05,894 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 238 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:05,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 42 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:04:05,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 18:04:05,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2022-01-31 18:04:05,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:04:05,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 249 transitions. [2022-01-31 18:04:05,967 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 249 transitions. Word has length 240 [2022-01-31 18:04:05,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:05,968 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 249 transitions. [2022-01-31 18:04:05,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 111 states have internal predecessors, (232), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:04:05,968 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 249 transitions. [2022-01-31 18:04:05,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-01-31 18:04:05,968 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:05,968 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:05,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 18:04:05,968 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:05,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:05,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1992404016, now seen corresponding path program 109 times [2022-01-31 18:04:05,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:05,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377871925] [2022-01-31 18:04:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:05,970 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:05,970 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:05,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:05,987 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:09,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:09,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2022-01-31 18:04:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:04:09,470 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:09,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377871925] [2022-01-31 18:04:09,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [377871925] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:09,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:09,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 18:04:09,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193252013] [2022-01-31 18:04:09,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:09,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 18:04:09,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:09,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 18:04:09,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 18:04:09,473 INFO L87 Difference]: Start difference. First operand 247 states and 249 transitions. Second operand has 113 states, 113 states have (on average 2.0707964601769913) internal successors, (234), 112 states have internal predecessors, (234), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:04:13,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:13,823 INFO L93 Difference]: Finished difference Result 272 states and 276 transitions. [2022-01-31 18:04:13,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 18:04:13,823 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0707964601769913) internal successors, (234), 112 states have internal predecessors, (234), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 242 [2022-01-31 18:04:13,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:13,824 INFO L225 Difference]: With dead ends: 272 [2022-01-31 18:04:13,824 INFO L226 Difference]: Without dead ends: 250 [2022-01-31 18:04:13,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 5 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 18:04:13,826 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 240 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:13,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 67 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:04:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-01-31 18:04:13,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2022-01-31 18:04:13,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 241 states have (on average 1.012448132780083) internal successors, (244), 241 states have internal predecessors, (244), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:04:13,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 251 transitions. [2022-01-31 18:04:13,912 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 251 transitions. Word has length 242 [2022-01-31 18:04:13,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:13,912 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 251 transitions. [2022-01-31 18:04:13,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0707964601769913) internal successors, (234), 112 states have internal predecessors, (234), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:04:13,912 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 251 transitions. [2022-01-31 18:04:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-01-31 18:04:13,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:13,913 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:13,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 18:04:13,913 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:13,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:13,913 INFO L85 PathProgramCache]: Analyzing trace with hash -31387022, now seen corresponding path program 110 times [2022-01-31 18:04:13,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:13,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825352673] [2022-01-31 18:04:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:13,914 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:13,914 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:13,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:13,931 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:17,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:17,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2022-01-31 18:04:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:04:17,656 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:17,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825352673] [2022-01-31 18:04:17,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1825352673] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:17,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:17,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 18:04:17,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033910504] [2022-01-31 18:04:17,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:17,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 18:04:17,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:17,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 18:04:17,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 18:04:17,658 INFO L87 Difference]: Start difference. First operand 249 states and 251 transitions. Second operand has 114 states, 114 states have (on average 2.0701754385964914) internal successors, (236), 113 states have internal predecessors, (236), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:04:22,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:22,412 INFO L93 Difference]: Finished difference Result 274 states and 278 transitions. [2022-01-31 18:04:22,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 18:04:22,413 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0701754385964914) internal successors, (236), 113 states have internal predecessors, (236), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 244 [2022-01-31 18:04:22,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:22,413 INFO L225 Difference]: With dead ends: 274 [2022-01-31 18:04:22,413 INFO L226 Difference]: Without dead ends: 252 [2022-01-31 18:04:22,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 18:04:22,415 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 242 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:22,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 47 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:04:22,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-01-31 18:04:22,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2022-01-31 18:04:22,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 243 states have (on average 1.0123456790123457) internal successors, (246), 243 states have internal predecessors, (246), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:04:22,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 253 transitions. [2022-01-31 18:04:22,491 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 253 transitions. Word has length 244 [2022-01-31 18:04:22,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:22,492 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 253 transitions. [2022-01-31 18:04:22,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.0701754385964914) internal successors, (236), 113 states have internal predecessors, (236), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:04:22,492 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 253 transitions. [2022-01-31 18:04:22,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-01-31 18:04:22,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:22,492 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:22,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 18:04:22,493 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:22,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:22,493 INFO L85 PathProgramCache]: Analyzing trace with hash -984698732, now seen corresponding path program 111 times [2022-01-31 18:04:22,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:22,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437708403] [2022-01-31 18:04:22,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:22,494 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:22,494 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:22,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:22,519 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:22,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:26,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:26,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2022-01-31 18:04:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:26,370 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 18:04:26,370 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:26,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437708403] [2022-01-31 18:04:26,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [437708403] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:26,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:26,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 18:04:26,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123074892] [2022-01-31 18:04:26,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:26,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 18:04:26,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:26,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 18:04:26,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 18:04:26,374 INFO L87 Difference]: Start difference. First operand 251 states and 253 transitions. Second operand has 115 states, 115 states have (on average 2.0695652173913044) internal successors, (238), 114 states have internal predecessors, (238), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:04:31,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:31,247 INFO L93 Difference]: Finished difference Result 276 states and 280 transitions. [2022-01-31 18:04:31,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 18:04:31,248 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0695652173913044) internal successors, (238), 114 states have internal predecessors, (238), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 246 [2022-01-31 18:04:31,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:31,248 INFO L225 Difference]: With dead ends: 276 [2022-01-31 18:04:31,248 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 18:04:31,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 18:04:31,251 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 244 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:31,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 37 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:04:31,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 18:04:31,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2022-01-31 18:04:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 245 states have (on average 1.0122448979591836) internal successors, (248), 245 states have internal predecessors, (248), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:04:31,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 255 transitions. [2022-01-31 18:04:31,329 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 255 transitions. Word has length 246 [2022-01-31 18:04:31,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:31,329 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 255 transitions. [2022-01-31 18:04:31,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.0695652173913044) internal successors, (238), 114 states have internal predecessors, (238), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:04:31,329 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 255 transitions. [2022-01-31 18:04:31,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-01-31 18:04:31,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:31,330 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:31,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 18:04:31,330 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:31,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:31,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2005749302, now seen corresponding path program 112 times [2022-01-31 18:04:31,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:31,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073389139] [2022-01-31 18:04:31,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:31,331 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:31,332 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:31,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:31,356 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:35,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:35,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-01-31 18:04:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:04:35,320 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:35,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073389139] [2022-01-31 18:04:35,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2073389139] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:35,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:35,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 18:04:35,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141842559] [2022-01-31 18:04:35,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:35,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 18:04:35,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:35,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 18:04:35,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 18:04:35,325 INFO L87 Difference]: Start difference. First operand 253 states and 255 transitions. Second operand has 116 states, 116 states have (on average 2.0689655172413794) internal successors, (240), 115 states have internal predecessors, (240), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:04:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:40,227 INFO L93 Difference]: Finished difference Result 278 states and 282 transitions. [2022-01-31 18:04:40,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 18:04:40,227 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0689655172413794) internal successors, (240), 115 states have internal predecessors, (240), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 248 [2022-01-31 18:04:40,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:40,228 INFO L225 Difference]: With dead ends: 278 [2022-01-31 18:04:40,228 INFO L226 Difference]: Without dead ends: 256 [2022-01-31 18:04:40,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 18:04:40,231 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 246 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:40,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 52 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:04:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-01-31 18:04:40,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2022-01-31 18:04:40,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 247 states have (on average 1.0121457489878543) internal successors, (250), 247 states have internal predecessors, (250), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:04:40,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 257 transitions. [2022-01-31 18:04:40,310 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 257 transitions. Word has length 248 [2022-01-31 18:04:40,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:40,310 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 257 transitions. [2022-01-31 18:04:40,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0689655172413794) internal successors, (240), 115 states have internal predecessors, (240), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:04:40,310 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 257 transitions. [2022-01-31 18:04:40,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-01-31 18:04:40,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:40,311 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:40,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 18:04:40,311 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:40,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:40,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1801778344, now seen corresponding path program 113 times [2022-01-31 18:04:40,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:40,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025680834] [2022-01-31 18:04:40,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:40,313 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:40,313 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:40,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:40,336 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:44,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:44,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2022-01-31 18:04:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:04:44,402 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:44,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025680834] [2022-01-31 18:04:44,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2025680834] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:44,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:44,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 18:04:44,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615408204] [2022-01-31 18:04:44,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:44,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 18:04:44,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:44,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 18:04:44,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 18:04:44,407 INFO L87 Difference]: Start difference. First operand 255 states and 257 transitions. Second operand has 117 states, 117 states have (on average 2.0683760683760686) internal successors, (242), 116 states have internal predecessors, (242), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:04:49,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:49,403 INFO L93 Difference]: Finished difference Result 280 states and 284 transitions. [2022-01-31 18:04:49,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 18:04:49,404 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0683760683760686) internal successors, (242), 116 states have internal predecessors, (242), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 250 [2022-01-31 18:04:49,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:49,404 INFO L225 Difference]: With dead ends: 280 [2022-01-31 18:04:49,404 INFO L226 Difference]: Without dead ends: 258 [2022-01-31 18:04:49,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 18:04:49,407 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 248 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:49,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 42 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:04:49,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-01-31 18:04:49,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2022-01-31 18:04:49,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 249 states have (on average 1.0120481927710843) internal successors, (252), 249 states have internal predecessors, (252), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:04:49,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 259 transitions. [2022-01-31 18:04:49,488 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 259 transitions. Word has length 250 [2022-01-31 18:04:49,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:49,488 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 259 transitions. [2022-01-31 18:04:49,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0683760683760686) internal successors, (242), 116 states have internal predecessors, (242), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:04:49,489 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 259 transitions. [2022-01-31 18:04:49,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-01-31 18:04:49,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:49,489 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:49,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 18:04:49,489 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:49,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:49,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1523709958, now seen corresponding path program 114 times [2022-01-31 18:04:49,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:49,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229211827] [2022-01-31 18:04:49,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:49,491 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:49,491 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:49,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:49,515 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:53,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:04:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:53,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2022-01-31 18:04:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:04:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:04:53,560 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:04:53,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229211827] [2022-01-31 18:04:53,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1229211827] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:04:53,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:04:53,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 18:04:53,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046049223] [2022-01-31 18:04:53,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:04:53,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 18:04:53,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:04:53,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 18:04:53,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 18:04:53,565 INFO L87 Difference]: Start difference. First operand 257 states and 259 transitions. Second operand has 118 states, 118 states have (on average 2.0677966101694913) internal successors, (244), 117 states have internal predecessors, (244), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:04:58,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:04:58,583 INFO L93 Difference]: Finished difference Result 282 states and 286 transitions. [2022-01-31 18:04:58,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 18:04:58,583 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0677966101694913) internal successors, (244), 117 states have internal predecessors, (244), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 252 [2022-01-31 18:04:58,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:04:58,584 INFO L225 Difference]: With dead ends: 282 [2022-01-31 18:04:58,584 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 18:04:58,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 18:04:58,587 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 250 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:04:58,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 47 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:04:58,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 18:04:58,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2022-01-31 18:04:58,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 251 states have (on average 1.0119521912350598) internal successors, (254), 251 states have internal predecessors, (254), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:04:58,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 261 transitions. [2022-01-31 18:04:58,669 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 261 transitions. Word has length 252 [2022-01-31 18:04:58,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:04:58,669 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 261 transitions. [2022-01-31 18:04:58,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0677966101694913) internal successors, (244), 117 states have internal predecessors, (244), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:04:58,669 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 261 transitions. [2022-01-31 18:04:58,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-01-31 18:04:58,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:04:58,670 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:04:58,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 18:04:58,670 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:04:58,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:04:58,670 INFO L85 PathProgramCache]: Analyzing trace with hash -587963364, now seen corresponding path program 115 times [2022-01-31 18:04:58,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:04:58,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483973587] [2022-01-31 18:04:58,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:04:58,671 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:04:58,672 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:04:58,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:04:58,696 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:04:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:02,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:02,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2022-01-31 18:05:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:05:02,843 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:02,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483973587] [2022-01-31 18:05:02,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [483973587] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:02,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:02,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 18:05:02,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612782803] [2022-01-31 18:05:02,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:02,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 18:05:02,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:02,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 18:05:02,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 18:05:02,848 INFO L87 Difference]: Start difference. First operand 259 states and 261 transitions. Second operand has 119 states, 119 states have (on average 2.0672268907563027) internal successors, (246), 118 states have internal predecessors, (246), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:05:07,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:07,991 INFO L93 Difference]: Finished difference Result 284 states and 288 transitions. [2022-01-31 18:05:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 18:05:07,991 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0672268907563027) internal successors, (246), 118 states have internal predecessors, (246), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 254 [2022-01-31 18:05:07,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:07,992 INFO L225 Difference]: With dead ends: 284 [2022-01-31 18:05:07,992 INFO L226 Difference]: Without dead ends: 262 [2022-01-31 18:05:07,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 18:05:07,995 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 252 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:07,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 72 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:05:07,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-31 18:05:08,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2022-01-31 18:05:08,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 253 states have (on average 1.0118577075098814) internal successors, (256), 253 states have internal predecessors, (256), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:05:08,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 263 transitions. [2022-01-31 18:05:08,079 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 263 transitions. Word has length 254 [2022-01-31 18:05:08,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:08,079 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 263 transitions. [2022-01-31 18:05:08,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.0672268907563027) internal successors, (246), 118 states have internal predecessors, (246), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:05:08,079 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 263 transitions. [2022-01-31 18:05:08,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-01-31 18:05:08,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:08,080 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:08,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 18:05:08,080 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:08,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:08,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1016348606, now seen corresponding path program 116 times [2022-01-31 18:05:08,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:08,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698627111] [2022-01-31 18:05:08,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:08,081 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:08,082 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:08,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:08,104 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:12,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:12,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2022-01-31 18:05:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:05:12,275 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:12,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698627111] [2022-01-31 18:05:12,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1698627111] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:12,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:12,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 18:05:12,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942577596] [2022-01-31 18:05:12,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:12,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 18:05:12,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:12,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 18:05:12,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 18:05:12,278 INFO L87 Difference]: Start difference. First operand 261 states and 263 transitions. Second operand has 120 states, 120 states have (on average 2.066666666666667) internal successors, (248), 119 states have internal predecessors, (248), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:05:17,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:17,390 INFO L93 Difference]: Finished difference Result 286 states and 290 transitions. [2022-01-31 18:05:17,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 18:05:17,390 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.066666666666667) internal successors, (248), 119 states have internal predecessors, (248), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 256 [2022-01-31 18:05:17,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:17,391 INFO L225 Difference]: With dead ends: 286 [2022-01-31 18:05:17,391 INFO L226 Difference]: Without dead ends: 264 [2022-01-31 18:05:17,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 18:05:17,394 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 254 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:17,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 52 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:05:17,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-01-31 18:05:17,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2022-01-31 18:05:17,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 255 states have (on average 1.011764705882353) internal successors, (258), 255 states have internal predecessors, (258), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:05:17,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 265 transitions. [2022-01-31 18:05:17,492 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 265 transitions. Word has length 256 [2022-01-31 18:05:17,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:17,492 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 265 transitions. [2022-01-31 18:05:17,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.066666666666667) internal successors, (248), 119 states have internal predecessors, (248), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:05:17,493 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 265 transitions. [2022-01-31 18:05:17,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-01-31 18:05:17,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:17,493 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:17,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 18:05:17,493 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:17,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:17,494 INFO L85 PathProgramCache]: Analyzing trace with hash 866892512, now seen corresponding path program 117 times [2022-01-31 18:05:17,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:17,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482323068] [2022-01-31 18:05:17,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:17,495 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:17,495 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:17,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:17,517 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:21,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:21,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-01-31 18:05:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:21,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:05:21,623 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:21,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482323068] [2022-01-31 18:05:21,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1482323068] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:21,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:21,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 18:05:21,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645286476] [2022-01-31 18:05:21,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:21,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 18:05:21,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:21,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 18:05:21,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 18:05:21,626 INFO L87 Difference]: Start difference. First operand 263 states and 265 transitions. Second operand has 121 states, 121 states have (on average 2.0661157024793386) internal successors, (250), 120 states have internal predecessors, (250), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:05:26,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:26,506 INFO L93 Difference]: Finished difference Result 288 states and 292 transitions. [2022-01-31 18:05:26,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 18:05:26,507 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.0661157024793386) internal successors, (250), 120 states have internal predecessors, (250), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 258 [2022-01-31 18:05:26,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:26,507 INFO L225 Difference]: With dead ends: 288 [2022-01-31 18:05:26,507 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 18:05:26,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 18:05:26,511 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 256 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:26,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 52 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:05:26,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 18:05:26,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2022-01-31 18:05:26,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 257 states have (on average 1.0116731517509727) internal successors, (260), 257 states have internal predecessors, (260), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:05:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 267 transitions. [2022-01-31 18:05:26,609 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 267 transitions. Word has length 258 [2022-01-31 18:05:26,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:26,609 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 267 transitions. [2022-01-31 18:05:26,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.0661157024793386) internal successors, (250), 120 states have internal predecessors, (250), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:05:26,610 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 267 transitions. [2022-01-31 18:05:26,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-01-31 18:05:26,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:26,610 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:26,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 18:05:26,610 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:26,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:26,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1026493054, now seen corresponding path program 118 times [2022-01-31 18:05:26,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:26,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780242582] [2022-01-31 18:05:26,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:26,612 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:26,612 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:26,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:26,635 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:30,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:30,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2022-01-31 18:05:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:05:30,647 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:30,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780242582] [2022-01-31 18:05:30,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1780242582] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:30,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:30,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 18:05:30,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905772397] [2022-01-31 18:05:30,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:30,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 18:05:30,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:30,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 18:05:30,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 18:05:30,650 INFO L87 Difference]: Start difference. First operand 265 states and 267 transitions. Second operand has 122 states, 122 states have (on average 2.0655737704918034) internal successors, (252), 121 states have internal predecessors, (252), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:05:35,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:35,529 INFO L93 Difference]: Finished difference Result 290 states and 294 transitions. [2022-01-31 18:05:35,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 18:05:35,530 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0655737704918034) internal successors, (252), 121 states have internal predecessors, (252), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 260 [2022-01-31 18:05:35,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:35,530 INFO L225 Difference]: With dead ends: 290 [2022-01-31 18:05:35,530 INFO L226 Difference]: Without dead ends: 268 [2022-01-31 18:05:35,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 18:05:35,532 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 258 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:35,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 52 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:05:35,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-01-31 18:05:35,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 267. [2022-01-31 18:05:35,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 259 states have (on average 1.0115830115830116) internal successors, (262), 259 states have internal predecessors, (262), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:05:35,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 269 transitions. [2022-01-31 18:05:35,619 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 269 transitions. Word has length 260 [2022-01-31 18:05:35,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:35,619 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 269 transitions. [2022-01-31 18:05:35,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0655737704918034) internal successors, (252), 121 states have internal predecessors, (252), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:05:35,620 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 269 transitions. [2022-01-31 18:05:35,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-01-31 18:05:35,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:35,620 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:35,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 18:05:35,620 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:35,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:35,621 INFO L85 PathProgramCache]: Analyzing trace with hash 496111524, now seen corresponding path program 119 times [2022-01-31 18:05:35,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:35,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492903595] [2022-01-31 18:05:35,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:35,622 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:35,622 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:35,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:35,643 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:39,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:39,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2022-01-31 18:05:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:05:39,719 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:39,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492903595] [2022-01-31 18:05:39,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1492903595] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:39,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:39,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 18:05:39,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234780410] [2022-01-31 18:05:39,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:39,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 18:05:39,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:39,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 18:05:39,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 18:05:39,723 INFO L87 Difference]: Start difference. First operand 267 states and 269 transitions. Second operand has 123 states, 123 states have (on average 2.065040650406504) internal successors, (254), 122 states have internal predecessors, (254), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:05:44,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:44,719 INFO L93 Difference]: Finished difference Result 292 states and 296 transitions. [2022-01-31 18:05:44,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 18:05:44,720 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.065040650406504) internal successors, (254), 122 states have internal predecessors, (254), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 262 [2022-01-31 18:05:44,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:44,720 INFO L225 Difference]: With dead ends: 292 [2022-01-31 18:05:44,720 INFO L226 Difference]: Without dead ends: 270 [2022-01-31 18:05:44,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 18:05:44,723 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 260 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:44,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 52 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:05:44,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-01-31 18:05:44,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2022-01-31 18:05:44,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 261 states have (on average 1.0114942528735633) internal successors, (264), 261 states have internal predecessors, (264), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:05:44,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 271 transitions. [2022-01-31 18:05:44,813 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 271 transitions. Word has length 262 [2022-01-31 18:05:44,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:44,813 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 271 transitions. [2022-01-31 18:05:44,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.065040650406504) internal successors, (254), 122 states have internal predecessors, (254), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:05:44,813 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 271 transitions. [2022-01-31 18:05:44,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-01-31 18:05:44,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:44,814 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:44,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 18:05:44,814 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:44,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:44,814 INFO L85 PathProgramCache]: Analyzing trace with hash -864736954, now seen corresponding path program 120 times [2022-01-31 18:05:44,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:44,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860881298] [2022-01-31 18:05:44,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:44,815 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:44,815 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:44,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:44,837 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:49,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:49,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2022-01-31 18:05:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:49,027 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 18:05:49,027 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:49,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860881298] [2022-01-31 18:05:49,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [860881298] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:49,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:49,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 18:05:49,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650925922] [2022-01-31 18:05:49,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:49,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 18:05:49,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:49,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 18:05:49,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 18:05:49,029 INFO L87 Difference]: Start difference. First operand 269 states and 271 transitions. Second operand has 124 states, 124 states have (on average 2.064516129032258) internal successors, (256), 123 states have internal predecessors, (256), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:05:54,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:05:54,070 INFO L93 Difference]: Finished difference Result 294 states and 298 transitions. [2022-01-31 18:05:54,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 18:05:54,070 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.064516129032258) internal successors, (256), 123 states have internal predecessors, (256), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 264 [2022-01-31 18:05:54,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:05:54,071 INFO L225 Difference]: With dead ends: 294 [2022-01-31 18:05:54,071 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 18:05:54,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 18:05:54,074 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 262 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:05:54,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 52 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:05:54,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 18:05:54,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2022-01-31 18:05:54,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 263 states have (on average 1.0114068441064639) internal successors, (266), 263 states have internal predecessors, (266), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:05:54,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 273 transitions. [2022-01-31 18:05:54,176 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 273 transitions. Word has length 264 [2022-01-31 18:05:54,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:05:54,176 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 273 transitions. [2022-01-31 18:05:54,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.064516129032258) internal successors, (256), 123 states have internal predecessors, (256), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:05:54,176 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 273 transitions. [2022-01-31 18:05:54,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-01-31 18:05:54,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:05:54,177 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:05:54,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 18:05:54,177 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:05:54,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:05:54,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1324900968, now seen corresponding path program 121 times [2022-01-31 18:05:54,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:05:54,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911161676] [2022-01-31 18:05:54,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:05:54,179 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:05:54,179 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:05:54,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:05:54,200 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:05:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:58,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:05:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:58,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2022-01-31 18:05:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:05:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:05:58,425 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:05:58,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911161676] [2022-01-31 18:05:58,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [911161676] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:05:58,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:05:58,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 18:05:58,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303703167] [2022-01-31 18:05:58,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:05:58,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 18:05:58,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:05:58,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 18:05:58,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 18:05:58,428 INFO L87 Difference]: Start difference. First operand 271 states and 273 transitions. Second operand has 125 states, 125 states have (on average 2.064) internal successors, (258), 124 states have internal predecessors, (258), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:06:03,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:03,707 INFO L93 Difference]: Finished difference Result 296 states and 300 transitions. [2022-01-31 18:06:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 18:06:03,708 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.064) internal successors, (258), 124 states have internal predecessors, (258), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 266 [2022-01-31 18:06:03,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:03,708 INFO L225 Difference]: With dead ends: 296 [2022-01-31 18:06:03,708 INFO L226 Difference]: Without dead ends: 274 [2022-01-31 18:06:03,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 18:06:03,711 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 264 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:03,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 67 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:06:03,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-01-31 18:06:03,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2022-01-31 18:06:03,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 265 states have (on average 1.0113207547169811) internal successors, (268), 265 states have internal predecessors, (268), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:06:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 275 transitions. [2022-01-31 18:06:03,802 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 275 transitions. Word has length 266 [2022-01-31 18:06:03,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:03,802 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 275 transitions. [2022-01-31 18:06:03,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.064) internal successors, (258), 124 states have internal predecessors, (258), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:06:03,802 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 275 transitions. [2022-01-31 18:06:03,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-01-31 18:06:03,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:03,803 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:03,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 18:06:03,803 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:03,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:03,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1032968970, now seen corresponding path program 122 times [2022-01-31 18:06:03,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:03,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746294652] [2022-01-31 18:06:03,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:03,805 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:03,805 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:03,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:03,829 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:08,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:08,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2022-01-31 18:06:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:06:08,246 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:08,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746294652] [2022-01-31 18:06:08,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [746294652] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:08,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:08,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 18:06:08,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299214984] [2022-01-31 18:06:08,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:08,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 18:06:08,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:08,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 18:06:08,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 18:06:08,250 INFO L87 Difference]: Start difference. First operand 273 states and 275 transitions. Second operand has 126 states, 126 states have (on average 2.0634920634920637) internal successors, (260), 125 states have internal predecessors, (260), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:06:13,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:13,577 INFO L93 Difference]: Finished difference Result 298 states and 302 transitions. [2022-01-31 18:06:13,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 18:06:13,578 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0634920634920637) internal successors, (260), 125 states have internal predecessors, (260), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 268 [2022-01-31 18:06:13,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:13,578 INFO L225 Difference]: With dead ends: 298 [2022-01-31 18:06:13,578 INFO L226 Difference]: Without dead ends: 276 [2022-01-31 18:06:13,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 18:06:13,582 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 266 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:13,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 57 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:06:13,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-01-31 18:06:13,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2022-01-31 18:06:13,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 267 states have (on average 1.0112359550561798) internal successors, (270), 267 states have internal predecessors, (270), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:06:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 277 transitions. [2022-01-31 18:06:13,687 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 277 transitions. Word has length 268 [2022-01-31 18:06:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:13,687 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 277 transitions. [2022-01-31 18:06:13,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0634920634920637) internal successors, (260), 125 states have internal predecessors, (260), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:06:13,688 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 277 transitions. [2022-01-31 18:06:13,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-31 18:06:13,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:13,688 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:13,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 18:06:13,688 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:13,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:13,689 INFO L85 PathProgramCache]: Analyzing trace with hash -340806868, now seen corresponding path program 123 times [2022-01-31 18:06:13,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:13,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501508588] [2022-01-31 18:06:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:13,694 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:13,694 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:13,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:13,716 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:18,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:18,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2022-01-31 18:06:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:18,065 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 18:06:18,065 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:18,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501508588] [2022-01-31 18:06:18,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [501508588] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:18,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:18,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 18:06:18,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994392615] [2022-01-31 18:06:18,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:18,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 18:06:18,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:18,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 18:06:18,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 18:06:18,068 INFO L87 Difference]: Start difference. First operand 275 states and 277 transitions. Second operand has 127 states, 127 states have (on average 2.062992125984252) internal successors, (262), 126 states have internal predecessors, (262), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:06:23,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:23,366 INFO L93 Difference]: Finished difference Result 300 states and 304 transitions. [2022-01-31 18:06:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 18:06:23,367 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.062992125984252) internal successors, (262), 126 states have internal predecessors, (262), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 270 [2022-01-31 18:06:23,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:23,367 INFO L225 Difference]: With dead ends: 300 [2022-01-31 18:06:23,367 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 18:06:23,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 18:06:23,370 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 268 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:23,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 47 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:06:23,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 18:06:23,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2022-01-31 18:06:23,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 269 states have (on average 1.0111524163568772) internal successors, (272), 269 states have internal predecessors, (272), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:06:23,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 279 transitions. [2022-01-31 18:06:23,464 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 279 transitions. Word has length 270 [2022-01-31 18:06:23,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:23,464 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 279 transitions. [2022-01-31 18:06:23,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.062992125984252) internal successors, (262), 126 states have internal predecessors, (262), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:06:23,464 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 279 transitions. [2022-01-31 18:06:23,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-01-31 18:06:23,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:23,465 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:23,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 18:06:23,465 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:23,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:23,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1984427314, now seen corresponding path program 124 times [2022-01-31 18:06:23,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:23,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644702829] [2022-01-31 18:06:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:23,466 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:23,466 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:23,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:23,489 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:23,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:27,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:27,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2022-01-31 18:06:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:06:27,928 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:27,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644702829] [2022-01-31 18:06:27,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [644702829] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:27,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:27,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 18:06:27,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281205348] [2022-01-31 18:06:27,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:27,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 18:06:27,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:27,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 18:06:27,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 18:06:27,932 INFO L87 Difference]: Start difference. First operand 277 states and 279 transitions. Second operand has 128 states, 128 states have (on average 2.0625) internal successors, (264), 127 states have internal predecessors, (264), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:06:33,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:33,316 INFO L93 Difference]: Finished difference Result 302 states and 306 transitions. [2022-01-31 18:06:33,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 18:06:33,316 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0625) internal successors, (264), 127 states have internal predecessors, (264), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 272 [2022-01-31 18:06:33,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:33,317 INFO L225 Difference]: With dead ends: 302 [2022-01-31 18:06:33,317 INFO L226 Difference]: Without dead ends: 280 [2022-01-31 18:06:33,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 5 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 18:06:33,321 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 270 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:33,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 52 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:06:33,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-01-31 18:06:33,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 279. [2022-01-31 18:06:33,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 271 states have (on average 1.011070110701107) internal successors, (274), 271 states have internal predecessors, (274), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:06:33,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 281 transitions. [2022-01-31 18:06:33,426 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 281 transitions. Word has length 272 [2022-01-31 18:06:33,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:33,426 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 281 transitions. [2022-01-31 18:06:33,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0625) internal successors, (264), 127 states have internal predecessors, (264), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:06:33,427 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 281 transitions. [2022-01-31 18:06:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-01-31 18:06:33,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:33,427 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:33,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 18:06:33,427 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:33,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:33,428 INFO L85 PathProgramCache]: Analyzing trace with hash -955710992, now seen corresponding path program 125 times [2022-01-31 18:06:33,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:33,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558385086] [2022-01-31 18:06:33,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:33,429 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:33,429 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:33,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:33,452 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:33,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:38,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:38,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2022-01-31 18:06:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:06:38,023 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:38,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558385086] [2022-01-31 18:06:38,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1558385086] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:38,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:38,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 18:06:38,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122838787] [2022-01-31 18:06:38,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:38,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 18:06:38,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:38,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 18:06:38,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 18:06:38,027 INFO L87 Difference]: Start difference. First operand 279 states and 281 transitions. Second operand has 129 states, 129 states have (on average 2.062015503875969) internal successors, (266), 128 states have internal predecessors, (266), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:06:43,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:43,523 INFO L93 Difference]: Finished difference Result 304 states and 308 transitions. [2022-01-31 18:06:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 18:06:43,523 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.062015503875969) internal successors, (266), 128 states have internal predecessors, (266), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 274 [2022-01-31 18:06:43,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:43,524 INFO L225 Difference]: With dead ends: 304 [2022-01-31 18:06:43,524 INFO L226 Difference]: Without dead ends: 282 [2022-01-31 18:06:43,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 18:06:43,526 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 272 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:43,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 67 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:06:43,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-01-31 18:06:43,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2022-01-31 18:06:43,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 273 states have (on average 1.010989010989011) internal successors, (276), 273 states have internal predecessors, (276), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:06:43,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 283 transitions. [2022-01-31 18:06:43,629 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 283 transitions. Word has length 274 [2022-01-31 18:06:43,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:43,629 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 283 transitions. [2022-01-31 18:06:43,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.062015503875969) internal successors, (266), 128 states have internal predecessors, (266), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:06:43,629 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 283 transitions. [2022-01-31 18:06:43,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-01-31 18:06:43,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:43,630 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:43,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 18:06:43,630 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:43,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:43,630 INFO L85 PathProgramCache]: Analyzing trace with hash -201803630, now seen corresponding path program 126 times [2022-01-31 18:06:43,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:43,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757163356] [2022-01-31 18:06:43,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:43,632 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:43,632 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:43,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:43,655 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:48,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:48,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2022-01-31 18:06:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:06:48,244 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:48,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757163356] [2022-01-31 18:06:48,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1757163356] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:48,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:48,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 18:06:48,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708524787] [2022-01-31 18:06:48,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:48,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 18:06:48,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:48,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 18:06:48,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 18:06:48,246 INFO L87 Difference]: Start difference. First operand 281 states and 283 transitions. Second operand has 130 states, 130 states have (on average 2.0615384615384613) internal successors, (268), 129 states have internal predecessors, (268), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:06:53,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:06:53,876 INFO L93 Difference]: Finished difference Result 306 states and 310 transitions. [2022-01-31 18:06:53,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 18:06:53,876 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0615384615384613) internal successors, (268), 129 states have internal predecessors, (268), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 276 [2022-01-31 18:06:53,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:06:53,877 INFO L225 Difference]: With dead ends: 306 [2022-01-31 18:06:53,877 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 18:06:53,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 18:06:53,879 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 274 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:06:53,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 62 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:06:53,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 18:06:53,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 283. [2022-01-31 18:06:53,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 275 states have (on average 1.010909090909091) internal successors, (278), 275 states have internal predecessors, (278), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:06:53,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 285 transitions. [2022-01-31 18:06:53,979 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 285 transitions. Word has length 276 [2022-01-31 18:06:53,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:06:53,979 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 285 transitions. [2022-01-31 18:06:53,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.0615384615384613) internal successors, (268), 129 states have internal predecessors, (268), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:06:53,979 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 285 transitions. [2022-01-31 18:06:53,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-01-31 18:06:53,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:06:53,980 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:06:53,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 18:06:53,980 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:06:53,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:06:53,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1546301772, now seen corresponding path program 127 times [2022-01-31 18:06:53,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:06:53,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850462962] [2022-01-31 18:06:53,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:06:53,981 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:06:53,981 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:06:53,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:06:54,006 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:06:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:58,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:06:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:58,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 261 [2022-01-31 18:06:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:06:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:06:58,776 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:06:58,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850462962] [2022-01-31 18:06:58,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [850462962] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:06:58,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:06:58,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 18:06:58,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216226483] [2022-01-31 18:06:58,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:06:58,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 18:06:58,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:06:58,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 18:06:58,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 18:06:58,780 INFO L87 Difference]: Start difference. First operand 283 states and 285 transitions. Second operand has 131 states, 131 states have (on average 2.0610687022900764) internal successors, (270), 130 states have internal predecessors, (270), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:07:04,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:07:04,592 INFO L93 Difference]: Finished difference Result 308 states and 312 transitions. [2022-01-31 18:07:04,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 18:07:04,593 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0610687022900764) internal successors, (270), 130 states have internal predecessors, (270), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 278 [2022-01-31 18:07:04,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:07:04,593 INFO L225 Difference]: With dead ends: 308 [2022-01-31 18:07:04,593 INFO L226 Difference]: Without dead ends: 286 [2022-01-31 18:07:04,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8255 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 18:07:04,597 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 276 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:07:04,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 37 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:07:04,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-01-31 18:07:04,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2022-01-31 18:07:04,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 277 states have (on average 1.0108303249097472) internal successors, (280), 277 states have internal predecessors, (280), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:07:04,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 287 transitions. [2022-01-31 18:07:04,712 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 287 transitions. Word has length 278 [2022-01-31 18:07:04,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:07:04,712 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 287 transitions. [2022-01-31 18:07:04,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0610687022900764) internal successors, (270), 130 states have internal predecessors, (270), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:07:04,712 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 287 transitions. [2022-01-31 18:07:04,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-01-31 18:07:04,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:07:04,713 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:07:04,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 18:07:04,713 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:07:04,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:07:04,713 INFO L85 PathProgramCache]: Analyzing trace with hash -823860138, now seen corresponding path program 128 times [2022-01-31 18:07:04,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:07:04,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470120713] [2022-01-31 18:07:04,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:07:04,714 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:07:04,715 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:07:04,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:07:04,742 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:07:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:09,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:07:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:09,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 263 [2022-01-31 18:07:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:07:09,585 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:07:09,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470120713] [2022-01-31 18:07:09,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1470120713] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:07:09,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:07:09,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 18:07:09,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173168469] [2022-01-31 18:07:09,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:07:09,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 18:07:09,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:07:09,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 18:07:09,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 18:07:09,589 INFO L87 Difference]: Start difference. First operand 285 states and 287 transitions. Second operand has 132 states, 132 states have (on average 2.0606060606060606) internal successors, (272), 131 states have internal predecessors, (272), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:07:15,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:07:15,390 INFO L93 Difference]: Finished difference Result 310 states and 314 transitions. [2022-01-31 18:07:15,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 18:07:15,390 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.0606060606060606) internal successors, (272), 131 states have internal predecessors, (272), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 280 [2022-01-31 18:07:15,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:07:15,391 INFO L225 Difference]: With dead ends: 310 [2022-01-31 18:07:15,391 INFO L226 Difference]: Without dead ends: 288 [2022-01-31 18:07:15,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 18:07:15,394 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 278 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:07:15,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 47 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:07:15,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-31 18:07:15,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2022-01-31 18:07:15,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 279 states have (on average 1.010752688172043) internal successors, (282), 279 states have internal predecessors, (282), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:07:15,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 289 transitions. [2022-01-31 18:07:15,511 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 289 transitions. Word has length 280 [2022-01-31 18:07:15,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:07:15,511 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 289 transitions. [2022-01-31 18:07:15,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.0606060606060606) internal successors, (272), 131 states have internal predecessors, (272), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:07:15,511 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 289 transitions. [2022-01-31 18:07:15,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-01-31 18:07:15,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:07:15,512 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:07:15,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 18:07:15,512 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:07:15,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:07:15,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1952815480, now seen corresponding path program 129 times [2022-01-31 18:07:15,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:07:15,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709038856] [2022-01-31 18:07:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:07:15,514 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:07:15,514 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:07:15,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:07:15,541 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:07:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:20,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:07:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:20,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2022-01-31 18:07:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:07:20,379 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:07:20,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709038856] [2022-01-31 18:07:20,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [709038856] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:07:20,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:07:20,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 18:07:20,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16584224] [2022-01-31 18:07:20,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:07:20,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 18:07:20,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:07:20,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 18:07:20,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 18:07:20,382 INFO L87 Difference]: Start difference. First operand 287 states and 289 transitions. Second operand has 133 states, 133 states have (on average 2.0601503759398496) internal successors, (274), 132 states have internal predecessors, (274), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:07:26,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:07:26,312 INFO L93 Difference]: Finished difference Result 312 states and 316 transitions. [2022-01-31 18:07:26,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 18:07:26,312 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.0601503759398496) internal successors, (274), 132 states have internal predecessors, (274), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 282 [2022-01-31 18:07:26,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:07:26,313 INFO L225 Difference]: With dead ends: 312 [2022-01-31 18:07:26,313 INFO L226 Difference]: Without dead ends: 290 [2022-01-31 18:07:26,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 18:07:26,316 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 280 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:07:26,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 57 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:07:26,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-31 18:07:26,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2022-01-31 18:07:26,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 281 states have (on average 1.01067615658363) internal successors, (284), 281 states have internal predecessors, (284), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:07:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 291 transitions. [2022-01-31 18:07:26,435 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 291 transitions. Word has length 282 [2022-01-31 18:07:26,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:07:26,435 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 291 transitions. [2022-01-31 18:07:26,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.0601503759398496) internal successors, (274), 132 states have internal predecessors, (274), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:07:26,435 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 291 transitions. [2022-01-31 18:07:26,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-01-31 18:07:26,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:07:26,436 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:07:26,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 18:07:26,436 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:07:26,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:07:26,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1131573734, now seen corresponding path program 130 times [2022-01-31 18:07:26,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:07:26,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066717412] [2022-01-31 18:07:26,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:07:26,437 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:07:26,437 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:07:26,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:07:26,466 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:07:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:31,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:07:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:31,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 267 [2022-01-31 18:07:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:07:31,408 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:07:31,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066717412] [2022-01-31 18:07:31,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1066717412] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:07:31,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:07:31,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 18:07:31,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978538887] [2022-01-31 18:07:31,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:07:31,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 18:07:31,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:07:31,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 18:07:31,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 18:07:31,412 INFO L87 Difference]: Start difference. First operand 289 states and 291 transitions. Second operand has 134 states, 134 states have (on average 2.0597014925373136) internal successors, (276), 133 states have internal predecessors, (276), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:07:37,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:07:37,424 INFO L93 Difference]: Finished difference Result 314 states and 318 transitions. [2022-01-31 18:07:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 18:07:37,424 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0597014925373136) internal successors, (276), 133 states have internal predecessors, (276), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 284 [2022-01-31 18:07:37,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:07:37,425 INFO L225 Difference]: With dead ends: 314 [2022-01-31 18:07:37,425 INFO L226 Difference]: Without dead ends: 292 [2022-01-31 18:07:37,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8645 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 18:07:37,428 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 282 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:07:37,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 57 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:07:37,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-01-31 18:07:37,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2022-01-31 18:07:37,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 283 states have (on average 1.010600706713781) internal successors, (286), 283 states have internal predecessors, (286), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:07:37,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 293 transitions. [2022-01-31 18:07:37,533 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 293 transitions. Word has length 284 [2022-01-31 18:07:37,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:07:37,533 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 293 transitions. [2022-01-31 18:07:37,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0597014925373136) internal successors, (276), 133 states have internal predecessors, (276), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:07:37,534 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 293 transitions. [2022-01-31 18:07:37,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-01-31 18:07:37,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:07:37,534 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:07:37,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 18:07:37,534 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:07:37,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:07:37,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1702174148, now seen corresponding path program 131 times [2022-01-31 18:07:37,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:07:37,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505640506] [2022-01-31 18:07:37,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:07:37,536 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:07:37,536 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:07:37,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:07:37,576 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:07:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:42,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:07:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:42,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 269 [2022-01-31 18:07:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:07:42,590 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:07:42,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505640506] [2022-01-31 18:07:42,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1505640506] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:07:42,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:07:42,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 18:07:42,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364184820] [2022-01-31 18:07:42,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:07:42,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 18:07:42,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:07:42,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 18:07:42,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 18:07:42,593 INFO L87 Difference]: Start difference. First operand 291 states and 293 transitions. Second operand has 135 states, 135 states have (on average 2.0592592592592593) internal successors, (278), 134 states have internal predecessors, (278), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:07:49,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:07:49,116 INFO L93 Difference]: Finished difference Result 316 states and 320 transitions. [2022-01-31 18:07:49,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 18:07:49,116 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.0592592592592593) internal successors, (278), 134 states have internal predecessors, (278), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 286 [2022-01-31 18:07:49,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:07:49,117 INFO L225 Difference]: With dead ends: 316 [2022-01-31 18:07:49,117 INFO L226 Difference]: Without dead ends: 294 [2022-01-31 18:07:49,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8777 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=26733, Invalid=44289, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 18:07:49,120 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 284 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:07:49,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 52 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:07:49,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-01-31 18:07:49,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2022-01-31 18:07:49,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 285 states have (on average 1.0105263157894737) internal successors, (288), 285 states have internal predecessors, (288), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:07:49,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 295 transitions. [2022-01-31 18:07:49,228 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 295 transitions. Word has length 286 [2022-01-31 18:07:49,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:07:49,229 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 295 transitions. [2022-01-31 18:07:49,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.0592592592592593) internal successors, (278), 134 states have internal predecessors, (278), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:07:49,229 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 295 transitions. [2022-01-31 18:07:49,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-01-31 18:07:49,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:07:49,229 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:07:49,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 18:07:49,230 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:07:49,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:07:49,230 INFO L85 PathProgramCache]: Analyzing trace with hash -293358114, now seen corresponding path program 132 times [2022-01-31 18:07:49,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:07:49,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320442554] [2022-01-31 18:07:49,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:07:49,231 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:07:49,231 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:07:49,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:07:49,281 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:07:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:54,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:07:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:54,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2022-01-31 18:07:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:07:54,653 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 18:07:54,653 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:07:54,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320442554] [2022-01-31 18:07:54,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1320442554] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:07:54,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:07:54,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 18:07:54,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097118592] [2022-01-31 18:07:54,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:07:54,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 18:07:54,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:07:54,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 18:07:54,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 18:07:54,657 INFO L87 Difference]: Start difference. First operand 293 states and 295 transitions. Second operand has 136 states, 136 states have (on average 2.0588235294117645) internal successors, (280), 135 states have internal predecessors, (280), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:08:01,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:01,295 INFO L93 Difference]: Finished difference Result 318 states and 322 transitions. [2022-01-31 18:08:01,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 18:08:01,296 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0588235294117645) internal successors, (280), 135 states have internal predecessors, (280), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 288 [2022-01-31 18:08:01,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:01,296 INFO L225 Difference]: With dead ends: 318 [2022-01-31 18:08:01,296 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 18:08:01,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8910 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=27135, Invalid=44957, Unknown=0, NotChecked=0, Total=72092 [2022-01-31 18:08:01,300 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 286 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:01,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 52 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:08:01,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 18:08:01,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 295. [2022-01-31 18:08:01,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 287 states have (on average 1.0104529616724738) internal successors, (290), 287 states have internal predecessors, (290), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:08:01,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 297 transitions. [2022-01-31 18:08:01,428 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 297 transitions. Word has length 288 [2022-01-31 18:08:01,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:01,431 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 297 transitions. [2022-01-31 18:08:01,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.0588235294117645) internal successors, (280), 135 states have internal predecessors, (280), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:08:01,431 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 297 transitions. [2022-01-31 18:08:01,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-31 18:08:01,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:01,433 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:01,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 18:08:01,433 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:01,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:01,433 INFO L85 PathProgramCache]: Analyzing trace with hash 664152320, now seen corresponding path program 133 times [2022-01-31 18:08:01,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:01,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876733319] [2022-01-31 18:08:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:01,434 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:01,434 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:01,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:01,467 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:06,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:06,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 273 [2022-01-31 18:08:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:08:06,894 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:06,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876733319] [2022-01-31 18:08:06,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1876733319] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:06,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:06,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 18:08:06,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831724653] [2022-01-31 18:08:06,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:06,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 18:08:06,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:06,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 18:08:06,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 18:08:06,898 INFO L87 Difference]: Start difference. First operand 295 states and 297 transitions. Second operand has 137 states, 137 states have (on average 2.0583941605839415) internal successors, (282), 136 states have internal predecessors, (282), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:08:13,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:13,639 INFO L93 Difference]: Finished difference Result 320 states and 324 transitions. [2022-01-31 18:08:13,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 18:08:13,639 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.0583941605839415) internal successors, (282), 136 states have internal predecessors, (282), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 290 [2022-01-31 18:08:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:13,640 INFO L225 Difference]: With dead ends: 320 [2022-01-31 18:08:13,640 INFO L226 Difference]: Without dead ends: 298 [2022-01-31 18:08:13,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9044 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=27540, Invalid=45630, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 18:08:13,643 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 288 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:13,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 57 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:08:13,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-01-31 18:08:13,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 297. [2022-01-31 18:08:13,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 289 states have (on average 1.0103806228373702) internal successors, (292), 289 states have internal predecessors, (292), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:08:13,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 299 transitions. [2022-01-31 18:08:13,773 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 299 transitions. Word has length 290 [2022-01-31 18:08:13,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:13,773 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 299 transitions. [2022-01-31 18:08:13,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.0583941605839415) internal successors, (282), 136 states have internal predecessors, (282), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:08:13,773 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 299 transitions. [2022-01-31 18:08:13,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-01-31 18:08:13,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:13,774 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:13,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 18:08:13,774 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:13,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:13,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1708678050, now seen corresponding path program 134 times [2022-01-31 18:08:13,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:13,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224618182] [2022-01-31 18:08:13,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:13,776 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:13,776 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:13,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:13,810 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:19,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:19,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 275 [2022-01-31 18:08:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:19,330 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 18:08:19,330 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:19,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224618182] [2022-01-31 18:08:19,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [224618182] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:19,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:19,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 18:08:19,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857831267] [2022-01-31 18:08:19,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:19,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 18:08:19,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:19,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 18:08:19,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 18:08:19,335 INFO L87 Difference]: Start difference. First operand 297 states and 299 transitions. Second operand has 138 states, 138 states have (on average 2.0579710144927534) internal successors, (284), 137 states have internal predecessors, (284), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:08:26,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:26,078 INFO L93 Difference]: Finished difference Result 322 states and 326 transitions. [2022-01-31 18:08:26,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 18:08:26,079 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0579710144927534) internal successors, (284), 137 states have internal predecessors, (284), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 292 [2022-01-31 18:08:26,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:26,079 INFO L225 Difference]: With dead ends: 322 [2022-01-31 18:08:26,080 INFO L226 Difference]: Without dead ends: 300 [2022-01-31 18:08:26,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9179 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=27948, Invalid=46308, Unknown=0, NotChecked=0, Total=74256 [2022-01-31 18:08:26,084 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 290 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:26,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 37 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:08:26,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-01-31 18:08:26,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2022-01-31 18:08:26,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 291 states have (on average 1.0103092783505154) internal successors, (294), 291 states have internal predecessors, (294), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:08:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 301 transitions. [2022-01-31 18:08:26,213 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 301 transitions. Word has length 292 [2022-01-31 18:08:26,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:26,213 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 301 transitions. [2022-01-31 18:08:26,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.0579710144927534) internal successors, (284), 137 states have internal predecessors, (284), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:08:26,214 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 301 transitions. [2022-01-31 18:08:26,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-01-31 18:08:26,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:26,214 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:26,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 18:08:26,215 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:26,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:26,215 INFO L85 PathProgramCache]: Analyzing trace with hash 475557316, now seen corresponding path program 135 times [2022-01-31 18:08:26,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:26,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403693483] [2022-01-31 18:08:26,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:26,216 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:26,216 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:26,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:26,249 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:31,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:31,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2022-01-31 18:08:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:08:31,628 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:31,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403693483] [2022-01-31 18:08:31,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [403693483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:31,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:31,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 18:08:31,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255435481] [2022-01-31 18:08:31,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:31,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 18:08:31,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:31,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 18:08:31,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 18:08:31,633 INFO L87 Difference]: Start difference. First operand 299 states and 301 transitions. Second operand has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 138 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:08:38,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:38,438 INFO L93 Difference]: Finished difference Result 324 states and 328 transitions. [2022-01-31 18:08:38,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 18:08:38,438 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 138 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 294 [2022-01-31 18:08:38,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:38,439 INFO L225 Difference]: With dead ends: 324 [2022-01-31 18:08:38,439 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 18:08:38,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9315 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=28359, Invalid=46991, Unknown=0, NotChecked=0, Total=75350 [2022-01-31 18:08:38,442 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 292 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:38,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 42 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:08:38,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 18:08:38,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 301. [2022-01-31 18:08:38,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.0102389078498293) internal successors, (296), 293 states have internal predecessors, (296), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:08:38,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 303 transitions. [2022-01-31 18:08:38,560 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 303 transitions. Word has length 294 [2022-01-31 18:08:38,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:38,560 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 303 transitions. [2022-01-31 18:08:38,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 138 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:08:38,560 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 303 transitions. [2022-01-31 18:08:38,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-01-31 18:08:38,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:38,561 INFO L514 BasicCegarLoop]: trace histogram [136, 136, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:38,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 18:08:38,561 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:38,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:38,561 INFO L85 PathProgramCache]: Analyzing trace with hash 857505638, now seen corresponding path program 136 times [2022-01-31 18:08:38,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:38,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870471017] [2022-01-31 18:08:38,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:38,562 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:38,562 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:38,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:38,597 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:43,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:44,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2022-01-31 18:08:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:08:44,004 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:44,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870471017] [2022-01-31 18:08:44,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [870471017] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:44,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:44,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 18:08:44,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613553664] [2022-01-31 18:08:44,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:44,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 18:08:44,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:44,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 18:08:44,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 18:08:44,007 INFO L87 Difference]: Start difference. First operand 301 states and 303 transitions. Second operand has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:08:50,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:08:50,491 INFO L93 Difference]: Finished difference Result 326 states and 330 transitions. [2022-01-31 18:08:50,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 18:08:50,491 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 296 [2022-01-31 18:08:50,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:08:50,492 INFO L225 Difference]: With dead ends: 326 [2022-01-31 18:08:50,492 INFO L226 Difference]: Without dead ends: 304 [2022-01-31 18:08:50,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9452 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=28773, Invalid=47679, Unknown=0, NotChecked=0, Total=76452 [2022-01-31 18:08:50,495 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 294 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:08:50,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 47 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:08:50,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-01-31 18:08:50,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 303. [2022-01-31 18:08:50,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 295 states have (on average 1.0101694915254238) internal successors, (298), 295 states have internal predecessors, (298), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:08:50,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 305 transitions. [2022-01-31 18:08:50,636 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 305 transitions. Word has length 296 [2022-01-31 18:08:50,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:08:50,636 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 305 transitions. [2022-01-31 18:08:50,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:08:50,636 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 305 transitions. [2022-01-31 18:08:50,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-01-31 18:08:50,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:08:50,637 INFO L514 BasicCegarLoop]: trace histogram [137, 137, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:08:50,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-01-31 18:08:50,637 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:08:50,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:08:50,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1457344376, now seen corresponding path program 137 times [2022-01-31 18:08:50,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:08:50,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777259178] [2022-01-31 18:08:50,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:08:50,639 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:08:50,639 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:08:50,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:08:50,672 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:08:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:56,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:08:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:56,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 281 [2022-01-31 18:08:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:08:56,128 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 18:08:56,129 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:08:56,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777259178] [2022-01-31 18:08:56,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [777259178] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:08:56,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:08:56,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-01-31 18:08:56,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723481811] [2022-01-31 18:08:56,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:08:56,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-01-31 18:08:56,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:08:56,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-01-31 18:08:56,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 18:08:56,132 INFO L87 Difference]: Start difference. First operand 303 states and 305 transitions. Second operand has 141 states, 141 states have (on average 2.0567375886524824) internal successors, (290), 140 states have internal predecessors, (290), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:02,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:02,721 INFO L93 Difference]: Finished difference Result 328 states and 332 transitions. [2022-01-31 18:09:02,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-31 18:09:02,721 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.0567375886524824) internal successors, (290), 140 states have internal predecessors, (290), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 298 [2022-01-31 18:09:02,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:02,722 INFO L225 Difference]: With dead ends: 328 [2022-01-31 18:09:02,722 INFO L226 Difference]: Without dead ends: 306 [2022-01-31 18:09:02,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9590 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=29190, Invalid=48372, Unknown=0, NotChecked=0, Total=77562 [2022-01-31 18:09:02,724 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 296 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:02,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 62 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:09:02,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-01-31 18:09:02,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2022-01-31 18:09:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 297 states have (on average 1.0101010101010102) internal successors, (300), 297 states have internal predecessors, (300), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:09:02,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 307 transitions. [2022-01-31 18:09:02,841 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 307 transitions. Word has length 298 [2022-01-31 18:09:02,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:02,841 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 307 transitions. [2022-01-31 18:09:02,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 2.0567375886524824) internal successors, (290), 140 states have internal predecessors, (290), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:02,841 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 307 transitions. [2022-01-31 18:09:02,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-01-31 18:09:02,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:02,842 INFO L514 BasicCegarLoop]: trace histogram [138, 138, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:02,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-01-31 18:09:02,842 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:02,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:02,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1235148502, now seen corresponding path program 138 times [2022-01-31 18:09:02,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:02,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070174709] [2022-01-31 18:09:02,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:02,844 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:02,844 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:02,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:02,874 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:08,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:08,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 283 [2022-01-31 18:09:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:08,449 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:08,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070174709] [2022-01-31 18:09:08,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1070174709] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:08,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:08,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-01-31 18:09:08,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731034550] [2022-01-31 18:09:08,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:08,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-01-31 18:09:08,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:08,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-01-31 18:09:08,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 18:09:08,452 INFO L87 Difference]: Start difference. First operand 305 states and 307 transitions. Second operand has 142 states, 142 states have (on average 2.056338028169014) internal successors, (292), 141 states have internal predecessors, (292), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:15,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:15,123 INFO L93 Difference]: Finished difference Result 330 states and 334 transitions. [2022-01-31 18:09:15,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-31 18:09:15,124 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.056338028169014) internal successors, (292), 141 states have internal predecessors, (292), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 300 [2022-01-31 18:09:15,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:15,124 INFO L225 Difference]: With dead ends: 330 [2022-01-31 18:09:15,124 INFO L226 Difference]: Without dead ends: 308 [2022-01-31 18:09:15,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9729 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=29610, Invalid=49070, Unknown=0, NotChecked=0, Total=78680 [2022-01-31 18:09:15,128 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 298 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:15,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 57 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:09:15,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-31 18:09:15,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 307. [2022-01-31 18:09:15,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 299 states have (on average 1.0100334448160535) internal successors, (302), 299 states have internal predecessors, (302), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:09:15,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 309 transitions. [2022-01-31 18:09:15,264 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 309 transitions. Word has length 300 [2022-01-31 18:09:15,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:15,265 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 309 transitions. [2022-01-31 18:09:15,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 2.056338028169014) internal successors, (292), 141 states have internal predecessors, (292), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:15,265 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 309 transitions. [2022-01-31 18:09:15,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-01-31 18:09:15,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:15,265 INFO L514 BasicCegarLoop]: trace histogram [139, 139, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:15,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-01-31 18:09:15,266 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:15,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:15,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1841688908, now seen corresponding path program 139 times [2022-01-31 18:09:15,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:15,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534447441] [2022-01-31 18:09:15,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:15,267 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:15,267 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:15,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:15,299 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:20,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:20,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 285 [2022-01-31 18:09:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:20,865 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:20,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534447441] [2022-01-31 18:09:20,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [534447441] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:20,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:20,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-01-31 18:09:20,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146707633] [2022-01-31 18:09:20,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:20,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-01-31 18:09:20,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:20,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-01-31 18:09:20,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 18:09:20,870 INFO L87 Difference]: Start difference. First operand 307 states and 309 transitions. Second operand has 143 states, 143 states have (on average 2.055944055944056) internal successors, (294), 142 states have internal predecessors, (294), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:27,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:27,687 INFO L93 Difference]: Finished difference Result 332 states and 336 transitions. [2022-01-31 18:09:27,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-31 18:09:27,687 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.055944055944056) internal successors, (294), 142 states have internal predecessors, (294), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 302 [2022-01-31 18:09:27,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:27,688 INFO L225 Difference]: With dead ends: 332 [2022-01-31 18:09:27,688 INFO L226 Difference]: Without dead ends: 310 [2022-01-31 18:09:27,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9869 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=30033, Invalid=49773, Unknown=0, NotChecked=0, Total=79806 [2022-01-31 18:09:27,691 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 300 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:27,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 72 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:09:27,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-01-31 18:09:27,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 309. [2022-01-31 18:09:27,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 301 states have (on average 1.0099667774086378) internal successors, (304), 301 states have internal predecessors, (304), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:09:27,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 311 transitions. [2022-01-31 18:09:27,826 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 311 transitions. Word has length 302 [2022-01-31 18:09:27,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:27,827 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 311 transitions. [2022-01-31 18:09:27,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.055944055944056) internal successors, (294), 142 states have internal predecessors, (294), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:27,827 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 311 transitions. [2022-01-31 18:09:27,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-01-31 18:09:27,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:27,827 INFO L514 BasicCegarLoop]: trace histogram [140, 140, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:27,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-01-31 18:09:27,828 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:27,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:27,828 INFO L85 PathProgramCache]: Analyzing trace with hash -550027026, now seen corresponding path program 140 times [2022-01-31 18:09:27,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:27,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219293890] [2022-01-31 18:09:27,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:27,829 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:27,829 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:27,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:27,859 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:33,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:33,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 287 [2022-01-31 18:09:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:33,709 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:33,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219293890] [2022-01-31 18:09:33,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1219293890] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:33,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:33,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-01-31 18:09:33,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906919959] [2022-01-31 18:09:33,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:33,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-01-31 18:09:33,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:33,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-01-31 18:09:33,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 18:09:33,713 INFO L87 Difference]: Start difference. First operand 309 states and 311 transitions. Second operand has 144 states, 144 states have (on average 2.0555555555555554) internal successors, (296), 143 states have internal predecessors, (296), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:40,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:40,827 INFO L93 Difference]: Finished difference Result 334 states and 338 transitions. [2022-01-31 18:09:40,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-31 18:09:40,828 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.0555555555555554) internal successors, (296), 143 states have internal predecessors, (296), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 304 [2022-01-31 18:09:40,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:40,828 INFO L225 Difference]: With dead ends: 334 [2022-01-31 18:09:40,828 INFO L226 Difference]: Without dead ends: 312 [2022-01-31 18:09:40,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10010 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=30459, Invalid=50481, Unknown=0, NotChecked=0, Total=80940 [2022-01-31 18:09:40,831 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 302 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:40,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 72 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:09:40,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-31 18:09:40,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 311. [2022-01-31 18:09:40,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 303 states have (on average 1.00990099009901) internal successors, (306), 303 states have internal predecessors, (306), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:09:40,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 313 transitions. [2022-01-31 18:09:40,974 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 313 transitions. Word has length 304 [2022-01-31 18:09:40,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:40,975 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 313 transitions. [2022-01-31 18:09:40,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 2.0555555555555554) internal successors, (296), 143 states have internal predecessors, (296), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:40,975 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 313 transitions. [2022-01-31 18:09:40,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-01-31 18:09:40,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:40,976 INFO L514 BasicCegarLoop]: trace histogram [141, 141, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:40,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-01-31 18:09:40,976 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:40,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:40,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1181536240, now seen corresponding path program 141 times [2022-01-31 18:09:40,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:40,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231468116] [2022-01-31 18:09:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:40,977 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:40,977 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:40,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:41,007 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:46,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:46,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 289 [2022-01-31 18:09:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:46,751 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:46,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231468116] [2022-01-31 18:09:46,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1231468116] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:46,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:46,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2022-01-31 18:09:46,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448229132] [2022-01-31 18:09:46,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:46,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-01-31 18:09:46,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:46,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-01-31 18:09:46,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 18:09:46,753 INFO L87 Difference]: Start difference. First operand 311 states and 313 transitions. Second operand has 145 states, 145 states have (on average 2.0551724137931036) internal successors, (298), 144 states have internal predecessors, (298), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:53,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:09:53,636 INFO L93 Difference]: Finished difference Result 336 states and 340 transitions. [2022-01-31 18:09:53,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-31 18:09:53,637 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.0551724137931036) internal successors, (298), 144 states have internal predecessors, (298), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 306 [2022-01-31 18:09:53,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:09:53,637 INFO L225 Difference]: With dead ends: 336 [2022-01-31 18:09:53,637 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 18:09:53,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10152 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=30888, Invalid=51194, Unknown=0, NotChecked=0, Total=82082 [2022-01-31 18:09:53,640 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 304 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:09:53,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 57 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:09:53,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 18:09:53,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 313. [2022-01-31 18:09:53,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 305 states have (on average 1.0098360655737706) internal successors, (308), 305 states have internal predecessors, (308), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:09:53,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 315 transitions. [2022-01-31 18:09:53,766 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 315 transitions. Word has length 306 [2022-01-31 18:09:53,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:09:53,766 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 315 transitions. [2022-01-31 18:09:53,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 2.0551724137931036) internal successors, (298), 144 states have internal predecessors, (298), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:09:53,767 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 315 transitions. [2022-01-31 18:09:53,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-01-31 18:09:53,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:09:53,767 INFO L514 BasicCegarLoop]: trace histogram [142, 142, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:09:53,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-01-31 18:09:53,768 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:09:53,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:09:53,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1823465138, now seen corresponding path program 142 times [2022-01-31 18:09:53,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:09:53,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799021594] [2022-01-31 18:09:53,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:09:53,771 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:09:53,771 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:09:53,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:09:53,805 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:09:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:59,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:09:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:59,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 291 [2022-01-31 18:09:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:09:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:09:59,557 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:09:59,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799021594] [2022-01-31 18:09:59,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1799021594] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:09:59,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:09:59,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-01-31 18:09:59,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100073856] [2022-01-31 18:09:59,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:09:59,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-01-31 18:09:59,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:09:59,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-01-31 18:09:59,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 18:09:59,561 INFO L87 Difference]: Start difference. First operand 313 states and 315 transitions. Second operand has 146 states, 146 states have (on average 2.0547945205479454) internal successors, (300), 145 states have internal predecessors, (300), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)