/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-cav19/array_init_both_ends_multiple_sum.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 19:46:23,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 19:46:23,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 19:46:23,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 19:46:23,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 19:46:23,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 19:46:23,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 19:46:23,190 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 19:46:23,203 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 19:46:23,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 19:46:23,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 19:46:23,205 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 19:46:23,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 19:46:23,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 19:46:23,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 19:46:23,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 19:46:23,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 19:46:23,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 19:46:23,207 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 19:46:23,207 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 19:46:23,207 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 19:46:23,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 19:46:23,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 19:46:23,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 19:46:23,207 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 19:46:23,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 19:46:23,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:46:23,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 19:46:23,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 19:46:23,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 19:46:23,208 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 19:46:23,208 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 19:46:23,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 19:46:23,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 19:46:23,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 19:46:23,445 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 19:46:23,446 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 19:46:23,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c [2022-01-31 19:46:23,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d0700561/3a7edd32ab8043f9bf33b6f07d46c911/FLAGa28da80f2 [2022-01-31 19:46:23,809 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 19:46:23,810 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_init_both_ends_multiple_sum.c [2022-01-31 19:46:23,817 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d0700561/3a7edd32ab8043f9bf33b6f07d46c911/FLAGa28da80f2 [2022-01-31 19:46:24,249 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d0700561/3a7edd32ab8043f9bf33b6f07d46c911 [2022-01-31 19:46:24,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 19:46:24,253 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 19:46:24,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 19:46:24,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 19:46:24,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 19:46:24,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:46:24" (1/1) ... [2022-01-31 19:46:24,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ccaa262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:46:24, skipping insertion in model container [2022-01-31 19:46:24,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:46:24" (1/1) ... [2022-01-31 19:46:24,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 19:46:24,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 19:46:24,433 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-cav19/array_init_both_ends_multiple_sum.c[424,437] [2022-01-31 19:46:24,449 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:46:24,456 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 19:46:24,468 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-cav19/array_init_both_ends_multiple_sum.c[424,437] [2022-01-31 19:46:24,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:46:24,494 INFO L208 MainTranslator]: Completed translation [2022-01-31 19:46:24,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:46:24 WrapperNode [2022-01-31 19:46:24,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 19:46:24,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 19:46:24,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 19:46:24,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 19:46:24,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:46:24" (1/1) ... [2022-01-31 19:46:24,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:46:24" (1/1) ... [2022-01-31 19:46:24,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:46:24" (1/1) ... [2022-01-31 19:46:24,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:46:24" (1/1) ... [2022-01-31 19:46:24,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:46:24" (1/1) ... [2022-01-31 19:46:24,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:46:24" (1/1) ... [2022-01-31 19:46:24,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:46:24" (1/1) ... [2022-01-31 19:46:24,529 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 19:46:24,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 19:46:24,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 19:46:24,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 19:46:24,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:46:24" (1/1) ... [2022-01-31 19:46:24,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:46:24,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 19:46:24,568 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 19:46:24,589 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 19:46:24,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 19:46:24,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 19:46:24,607 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 19:46:24,607 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 19:46:24,607 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 19:46:24,608 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 19:46:24,608 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 19:46:24,608 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 19:46:24,608 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 19:46:24,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 19:46:24,608 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 19:46:24,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 19:46:24,609 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 19:46:24,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 19:46:24,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 19:46:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 19:46:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 19:46:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 19:46:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 19:46:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 19:46:24,655 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 19:46:24,656 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 19:46:24,803 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 19:46:24,807 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 19:46:24,807 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 19:46:24,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:46:24 BoogieIcfgContainer [2022-01-31 19:46:24,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 19:46:24,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 19:46:24,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 19:46:24,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 19:46:24,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:46:24" (1/3) ... [2022-01-31 19:46:24,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c93eb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:46:24, skipping insertion in model container [2022-01-31 19:46:24,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:46:24" (2/3) ... [2022-01-31 19:46:24,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c93eb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:46:24, skipping insertion in model container [2022-01-31 19:46:24,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:46:24" (3/3) ... [2022-01-31 19:46:24,823 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_both_ends_multiple_sum.c [2022-01-31 19:46:24,826 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 19:46:24,826 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 19:46:24,855 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 19:46:24,875 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 19:46:24,875 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 19:46:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 19:46:24,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 19:46:24,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:24,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:24,900 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:24,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:24,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1294526303, now seen corresponding path program 1 times [2022-01-31 19:46:24,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:24,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316557835] [2022-01-31 19:46:24,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:24,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:24,983 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:25,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:25,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:25,105 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:25,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316557835] [2022-01-31 19:46:25,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [316557835] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:25,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:25,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 19:46:25,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098694199] [2022-01-31 19:46:25,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:25,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 19:46:25,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:25,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 19:46:25,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 19:46:25,128 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:25,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:25,182 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2022-01-31 19:46:25,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 19:46:25,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 19:46:25,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:25,188 INFO L225 Difference]: With dead ends: 44 [2022-01-31 19:46:25,188 INFO L226 Difference]: Without dead ends: 19 [2022-01-31 19:46:25,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 19:46:25,192 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:25,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 23 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 19:46:25,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-31 19:46:25,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-31 19:46:25,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:25,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-01-31 19:46:25,216 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2022-01-31 19:46:25,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:25,216 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-01-31 19:46:25,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:25,216 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-01-31 19:46:25,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 19:46:25,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:25,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:25,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 19:46:25,218 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:25,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:25,218 INFO L85 PathProgramCache]: Analyzing trace with hash 258930387, now seen corresponding path program 1 times [2022-01-31 19:46:25,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:25,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548760683] [2022-01-31 19:46:25,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:25,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:25,221 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:25,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:25,307 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:25,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548760683] [2022-01-31 19:46:25,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [548760683] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:25,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:25,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 19:46:25,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106127948] [2022-01-31 19:46:25,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:25,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:46:25,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:25,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:46:25,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:46:25,309 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:25,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:25,377 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2022-01-31 19:46:25,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 19:46:25,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 19:46:25,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:25,378 INFO L225 Difference]: With dead ends: 36 [2022-01-31 19:46:25,378 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 19:46:25,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 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 19:46:25,379 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:25,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 14 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 19:46:25,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 19:46:25,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-01-31 19:46:25,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:25,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-31 19:46:25,386 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2022-01-31 19:46:25,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:25,386 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-31 19:46:25,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:25,386 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-31 19:46:25,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 19:46:25,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:25,387 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:25,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 19:46:25,388 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:25,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:25,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1778837389, now seen corresponding path program 1 times [2022-01-31 19:46:25,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:25,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986950043] [2022-01-31 19:46:25,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:25,406 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:25,407 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:25,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:25,410 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:25,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:25,519 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:25,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986950043] [2022-01-31 19:46:25,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [986950043] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:25,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:25,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:46:25,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216307435] [2022-01-31 19:46:25,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:25,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 19:46:25,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:25,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 19:46:25,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:46:25,521 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:25,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:25,623 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-01-31 19:46:25,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 19:46:25,623 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-01-31 19:46:25,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:25,624 INFO L225 Difference]: With dead ends: 44 [2022-01-31 19:46:25,624 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 19:46:25,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-01-31 19:46:25,625 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:25,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 15 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:46:25,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 19:46:25,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-01-31 19:46:25,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-01-31 19:46:25,632 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2022-01-31 19:46:25,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:25,632 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-01-31 19:46:25,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:25,632 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-01-31 19:46:25,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 19:46:25,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:25,633 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:25,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 19:46:25,633 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:25,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:25,633 INFO L85 PathProgramCache]: Analyzing trace with hash 660448455, now seen corresponding path program 2 times [2022-01-31 19:46:25,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:25,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003851245] [2022-01-31 19:46:25,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:25,636 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:25,636 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:25,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:25,637 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:25,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:25,757 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:25,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003851245] [2022-01-31 19:46:25,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1003851245] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:25,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:25,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 19:46:25,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525838552] [2022-01-31 19:46:25,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:25,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 19:46:25,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:25,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 19:46:25,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 19:46:25,759 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:25,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:25,851 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-01-31 19:46:25,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 19:46:25,852 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 19:46:25,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:25,853 INFO L225 Difference]: With dead ends: 54 [2022-01-31 19:46:25,853 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 19:46:25,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-01-31 19:46:25,854 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:25,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 17 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 19:46:25,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 19:46:25,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2022-01-31 19:46:25,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-01-31 19:46:25,862 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 27 [2022-01-31 19:46:25,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:25,862 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-01-31 19:46:25,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-01-31 19:46:25,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 19:46:25,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:25,863 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:25,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 19:46:25,863 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:25,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:25,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1117794687, now seen corresponding path program 3 times [2022-01-31 19:46:25,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:25,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591730091] [2022-01-31 19:46:25,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:25,865 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:25,865 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:25,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:25,867 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:25,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:25,927 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:25,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591730091] [2022-01-31 19:46:25,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [591730091] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:25,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:25,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 19:46:25,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249794127] [2022-01-31 19:46:25,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:25,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 19:46:25,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:25,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 19:46:25,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-31 19:46:25,929 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:26,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:26,067 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-01-31 19:46:26,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 19:46:26,067 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-01-31 19:46:26,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:26,068 INFO L225 Difference]: With dead ends: 64 [2022-01-31 19:46:26,068 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 19:46:26,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-01-31 19:46:26,069 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 64 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:26,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 19 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:46:26,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 19:46:26,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-01-31 19:46:26,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:26,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-01-31 19:46:26,077 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2022-01-31 19:46:26,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:26,077 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-01-31 19:46:26,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:26,077 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-01-31 19:46:26,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 19:46:26,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:26,078 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:26,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 19:46:26,078 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:26,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:26,078 INFO L85 PathProgramCache]: Analyzing trace with hash -66976581, now seen corresponding path program 4 times [2022-01-31 19:46:26,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:26,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924495747] [2022-01-31 19:46:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:26,080 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:26,080 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:26,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:26,081 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:26,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:26,153 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:26,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924495747] [2022-01-31 19:46:26,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1924495747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:26,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:26,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 19:46:26,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700757818] [2022-01-31 19:46:26,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:26,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 19:46:26,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:26,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 19:46:26,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-31 19:46:26,154 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:26,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:26,278 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2022-01-31 19:46:26,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 19:46:26,278 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 19:46:26,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:26,278 INFO L225 Difference]: With dead ends: 74 [2022-01-31 19:46:26,279 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 19:46:26,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2022-01-31 19:46:26,279 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 65 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:26,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 17 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:46:26,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 19:46:26,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-01-31 19:46:26,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2022-01-31 19:46:26,287 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2022-01-31 19:46:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:26,287 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2022-01-31 19:46:26,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:26,287 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2022-01-31 19:46:26,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 19:46:26,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:26,288 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:26,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 19:46:26,288 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:26,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:26,288 INFO L85 PathProgramCache]: Analyzing trace with hash -415176843, now seen corresponding path program 5 times [2022-01-31 19:46:26,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:26,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861118562] [2022-01-31 19:46:26,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:26,290 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:26,290 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:26,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:26,291 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:26,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:26,367 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:26,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861118562] [2022-01-31 19:46:26,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [861118562] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:26,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:26,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 19:46:26,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467497996] [2022-01-31 19:46:26,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:26,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:46:26,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:26,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:46:26,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:46:26,368 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:26,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:26,515 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2022-01-31 19:46:26,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 19:46:26,516 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-01-31 19:46:26,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:26,516 INFO L225 Difference]: With dead ends: 84 [2022-01-31 19:46:26,516 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 19:46:26,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-01-31 19:46:26,517 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:26,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 19 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:46:26,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 19:46:26,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2022-01-31 19:46:26,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:26,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-01-31 19:46:26,525 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2022-01-31 19:46:26,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:26,525 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-01-31 19:46:26,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:26,525 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-01-31 19:46:26,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 19:46:26,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:26,526 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:26,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 19:46:26,526 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:26,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:26,526 INFO L85 PathProgramCache]: Analyzing trace with hash 287381167, now seen corresponding path program 6 times [2022-01-31 19:46:26,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:26,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030021314] [2022-01-31 19:46:26,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:26,528 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:26,528 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:26,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:26,529 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:26,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:26,614 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:26,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030021314] [2022-01-31 19:46:26,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2030021314] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:26,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:26,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:46:26,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685349156] [2022-01-31 19:46:26,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:26,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 19:46:26,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:26,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 19:46:26,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-01-31 19:46:26,616 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:26,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:26,788 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2022-01-31 19:46:26,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 19:46:26,789 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 19:46:26,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:26,789 INFO L225 Difference]: With dead ends: 94 [2022-01-31 19:46:26,789 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 19:46:26,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-01-31 19:46:26,790 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 83 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:26,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 19 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:46:26,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 19:46:26,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2022-01-31 19:46:26,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:26,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2022-01-31 19:46:26,808 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 51 [2022-01-31 19:46:26,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:26,809 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2022-01-31 19:46:26,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:26,809 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2022-01-31 19:46:26,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 19:46:26,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:26,809 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:26,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 19:46:26,810 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:26,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:26,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1940861545, now seen corresponding path program 7 times [2022-01-31 19:46:26,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:26,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111937749] [2022-01-31 19:46:26,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:26,812 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:26,812 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:26,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:26,813 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:26,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:26,905 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:26,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111937749] [2022-01-31 19:46:26,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [111937749] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:26,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:26,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 19:46:26,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873565293] [2022-01-31 19:46:26,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:26,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:46:26,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:26,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:46:26,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:46:26,906 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:27,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:27,092 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2022-01-31 19:46:27,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 19:46:27,093 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-01-31 19:46:27,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:27,093 INFO L225 Difference]: With dead ends: 104 [2022-01-31 19:46:27,093 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 19:46:27,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-01-31 19:46:27,094 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:27,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 23 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:46:27,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 19:46:27,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-01-31 19:46:27,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:27,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-01-31 19:46:27,103 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2022-01-31 19:46:27,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:27,103 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-01-31 19:46:27,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:27,103 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-01-31 19:46:27,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 19:46:27,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:27,104 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:27,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 19:46:27,104 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:27,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:27,104 INFO L85 PathProgramCache]: Analyzing trace with hash -889202013, now seen corresponding path program 8 times [2022-01-31 19:46:27,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:27,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622933669] [2022-01-31 19:46:27,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:27,106 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:27,106 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:27,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:27,107 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:27,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:27,207 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:27,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622933669] [2022-01-31 19:46:27,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1622933669] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:27,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:27,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:46:27,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484905171] [2022-01-31 19:46:27,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:27,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 19:46:27,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:27,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 19:46:27,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-01-31 19:46:27,209 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:27,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:27,436 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2022-01-31 19:46:27,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 19:46:27,436 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 19:46:27,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:27,437 INFO L225 Difference]: With dead ends: 114 [2022-01-31 19:46:27,437 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 19:46:27,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-01-31 19:46:27,438 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:27,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 17 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:46:27,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 19:46:27,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2022-01-31 19:46:27,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2022-01-31 19:46:27,460 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2022-01-31 19:46:27,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:27,460 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2022-01-31 19:46:27,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:27,460 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2022-01-31 19:46:27,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 19:46:27,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:27,461 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:27,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 19:46:27,461 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:27,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:27,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1865396061, now seen corresponding path program 9 times [2022-01-31 19:46:27,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:27,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990245722] [2022-01-31 19:46:27,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:27,463 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:27,463 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:27,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:27,464 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:27,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:27,571 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 19:46:27,571 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:27,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990245722] [2022-01-31 19:46:27,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [990245722] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:27,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:27,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 19:46:27,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495973067] [2022-01-31 19:46:27,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:27,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:46:27,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:27,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:46:27,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:46:27,572 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:27,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:27,812 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2022-01-31 19:46:27,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 19:46:27,812 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 19:46:27,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:27,813 INFO L225 Difference]: With dead ends: 124 [2022-01-31 19:46:27,813 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 19:46:27,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-01-31 19:46:27,814 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 106 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:27,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 21 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:46:27,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 19:46:27,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2022-01-31 19:46:27,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:27,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-01-31 19:46:27,824 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 69 [2022-01-31 19:46:27,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:27,824 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-01-31 19:46:27,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:27,824 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-01-31 19:46:27,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 19:46:27,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:27,825 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:27,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 19:46:27,825 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:27,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:27,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1369223017, now seen corresponding path program 10 times [2022-01-31 19:46:27,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:27,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110532161] [2022-01-31 19:46:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:27,826 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:27,827 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:27,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:27,828 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:27,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:27,945 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:27,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110532161] [2022-01-31 19:46:27,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1110532161] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:27,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:27,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:46:27,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043971786] [2022-01-31 19:46:27,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:27,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 19:46:27,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:27,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 19:46:27,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-01-31 19:46:27,947 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:28,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:28,188 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2022-01-31 19:46:28,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 19:46:28,189 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 19:46:28,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:28,189 INFO L225 Difference]: With dead ends: 134 [2022-01-31 19:46:28,189 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 19:46:28,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:46:28,190 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 141 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:28,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 17 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:46:28,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 19:46:28,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2022-01-31 19:46:28,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2022-01-31 19:46:28,200 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 75 [2022-01-31 19:46:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:28,200 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2022-01-31 19:46:28,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:28,200 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2022-01-31 19:46:28,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 19:46:28,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:28,201 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:28,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 19:46:28,201 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:28,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:28,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1496883631, now seen corresponding path program 11 times [2022-01-31 19:46:28,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:28,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490460561] [2022-01-31 19:46:28,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:28,203 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:28,203 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:28,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:28,204 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:28,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:28,329 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:28,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490460561] [2022-01-31 19:46:28,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1490460561] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:28,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:28,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 19:46:28,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967181391] [2022-01-31 19:46:28,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:28,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:46:28,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:28,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:46:28,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:46:28,330 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:28,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:28,602 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2022-01-31 19:46:28,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:46:28,603 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 19:46:28,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:28,603 INFO L225 Difference]: With dead ends: 144 [2022-01-31 19:46:28,603 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 19:46:28,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-01-31 19:46:28,604 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 130 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:28,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 19 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:46:28,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 19:46:28,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2022-01-31 19:46:28,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:28,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-01-31 19:46:28,615 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 81 [2022-01-31 19:46:28,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:28,615 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-01-31 19:46:28,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:28,615 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-01-31 19:46:28,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 19:46:28,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:28,616 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:28,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 19:46:28,616 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:28,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:28,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1601144693, now seen corresponding path program 12 times [2022-01-31 19:46:28,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:28,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917400070] [2022-01-31 19:46:28,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:28,617 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:28,618 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:28,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:28,618 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:28,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:28,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:28,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:28,755 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:28,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917400070] [2022-01-31 19:46:28,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [917400070] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:28,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:28,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:46:28,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765855884] [2022-01-31 19:46:28,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:28,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 19:46:28,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:28,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 19:46:28,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-01-31 19:46:28,756 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:29,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:29,042 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2022-01-31 19:46:29,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 19:46:29,042 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-01-31 19:46:29,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:29,043 INFO L225 Difference]: With dead ends: 154 [2022-01-31 19:46:29,043 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 19:46:29,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-01-31 19:46:29,044 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 153 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:29,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 17 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:46:29,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 19:46:29,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2022-01-31 19:46:29,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:29,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2022-01-31 19:46:29,055 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 87 [2022-01-31 19:46:29,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:29,056 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2022-01-31 19:46:29,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:29,056 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2022-01-31 19:46:29,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 19:46:29,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:29,056 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:29,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 19:46:29,056 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:29,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:29,057 INFO L85 PathProgramCache]: Analyzing trace with hash -402964667, now seen corresponding path program 13 times [2022-01-31 19:46:29,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:29,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049232649] [2022-01-31 19:46:29,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:29,058 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:29,058 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:29,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:29,059 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:29,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:29,220 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 19:46:29,220 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:29,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049232649] [2022-01-31 19:46:29,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1049232649] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:29,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:29,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 19:46:29,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509510482] [2022-01-31 19:46:29,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:29,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:46:29,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:29,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:46:29,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:46:29,221 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:29,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:29,534 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2022-01-31 19:46:29,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 19:46:29,534 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-01-31 19:46:29,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:29,534 INFO L225 Difference]: With dead ends: 164 [2022-01-31 19:46:29,535 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 19:46:29,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:46:29,535 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 180 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:29,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 15 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:46:29,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 19:46:29,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2022-01-31 19:46:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:29,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-01-31 19:46:29,545 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2022-01-31 19:46:29,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:29,546 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-01-31 19:46:29,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:29,546 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-01-31 19:46:29,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 19:46:29,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:29,546 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:29,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 19:46:29,546 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:29,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:29,547 INFO L85 PathProgramCache]: Analyzing trace with hash 659313279, now seen corresponding path program 14 times [2022-01-31 19:46:29,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:29,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863276634] [2022-01-31 19:46:29,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:29,548 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:29,548 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:29,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:29,549 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:29,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:29,709 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 19:46:29,709 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:29,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863276634] [2022-01-31 19:46:29,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [863276634] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:29,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:29,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:46:29,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376429941] [2022-01-31 19:46:29,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:29,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 19:46:29,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:29,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 19:46:29,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-01-31 19:46:29,710 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:30,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:30,057 INFO L93 Difference]: Finished difference Result 174 states and 180 transitions. [2022-01-31 19:46:30,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 19:46:30,057 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-01-31 19:46:30,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:30,058 INFO L225 Difference]: With dead ends: 174 [2022-01-31 19:46:30,058 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 19:46:30,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 19:46:30,059 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 161 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:30,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 21 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:46:30,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 19:46:30,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2022-01-31 19:46:30,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 101 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:30,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2022-01-31 19:46:30,070 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 99 [2022-01-31 19:46:30,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:30,070 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2022-01-31 19:46:30,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:30,070 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2022-01-31 19:46:30,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 19:46:30,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:30,071 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:30,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 19:46:30,071 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:30,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:30,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1087394361, now seen corresponding path program 15 times [2022-01-31 19:46:30,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:30,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293230852] [2022-01-31 19:46:30,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:30,073 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:30,073 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:30,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:30,074 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:30,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:30,253 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 19:46:30,253 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:30,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293230852] [2022-01-31 19:46:30,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1293230852] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:30,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:30,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 19:46:30,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049563253] [2022-01-31 19:46:30,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:30,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:46:30,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:30,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:46:30,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:46:30,255 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:30,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:30,616 INFO L93 Difference]: Finished difference Result 184 states and 190 transitions. [2022-01-31 19:46:30,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 19:46:30,617 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-01-31 19:46:30,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:30,617 INFO L225 Difference]: With dead ends: 184 [2022-01-31 19:46:30,617 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 19:46:30,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:46:30,618 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 166 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:30,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 21 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:46:30,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 19:46:30,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2022-01-31 19:46:30,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:30,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2022-01-31 19:46:30,630 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 105 [2022-01-31 19:46:30,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:30,630 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2022-01-31 19:46:30,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:30,630 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2022-01-31 19:46:30,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 19:46:30,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:30,631 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:30,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 19:46:30,631 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:30,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:30,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1461985677, now seen corresponding path program 16 times [2022-01-31 19:46:30,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:30,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399703611] [2022-01-31 19:46:30,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:30,633 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:30,633 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:30,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:30,634 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:30,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:30,841 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:30,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399703611] [2022-01-31 19:46:30,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [399703611] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:30,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:30,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:46:30,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150519393] [2022-01-31 19:46:30,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:30,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 19:46:30,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:30,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 19:46:30,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-01-31 19:46:30,843 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 21 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:31,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:31,250 INFO L93 Difference]: Finished difference Result 194 states and 200 transitions. [2022-01-31 19:46:31,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 19:46:31,250 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-01-31 19:46:31,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:31,251 INFO L225 Difference]: With dead ends: 194 [2022-01-31 19:46:31,251 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 19:46:31,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:46:31,252 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 205 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:31,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 17 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:46:31,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 19:46:31,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-01-31 19:46:31,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 113 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2022-01-31 19:46:31,266 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 111 [2022-01-31 19:46:31,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:31,266 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2022-01-31 19:46:31,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:31,266 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2022-01-31 19:46:31,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 19:46:31,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:31,267 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:31,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 19:46:31,267 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:31,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:31,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1070307117, now seen corresponding path program 17 times [2022-01-31 19:46:31,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:31,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361634151] [2022-01-31 19:46:31,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:31,269 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:31,269 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:31,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:31,270 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:31,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:31,448 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:31,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361634151] [2022-01-31 19:46:31,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [361634151] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:31,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:31,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 19:46:31,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238846324] [2022-01-31 19:46:31,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:31,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:46:31,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:31,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:46:31,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:46:31,449 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:31,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:31,830 INFO L93 Difference]: Finished difference Result 204 states and 210 transitions. [2022-01-31 19:46:31,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:46:31,830 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-01-31 19:46:31,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:31,831 INFO L225 Difference]: With dead ends: 204 [2022-01-31 19:46:31,831 INFO L226 Difference]: Without dead ends: 127 [2022-01-31 19:46:31,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 19:46:31,832 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 244 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:31,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 15 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:46:31,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-31 19:46:31,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2022-01-31 19:46:31,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:31,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2022-01-31 19:46:31,846 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 117 [2022-01-31 19:46:31,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:31,846 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2022-01-31 19:46:31,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:31,846 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2022-01-31 19:46:31,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 19:46:31,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:31,847 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:31,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 19:46:31,847 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:31,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:31,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1409016729, now seen corresponding path program 18 times [2022-01-31 19:46:31,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:31,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530004986] [2022-01-31 19:46:31,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:31,850 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:31,850 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:31,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:31,851 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:32,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:32,079 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:32,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530004986] [2022-01-31 19:46:32,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1530004986] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:32,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:32,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:46:32,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206884031] [2022-01-31 19:46:32,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:32,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 19:46:32,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:32,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 19:46:32,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-01-31 19:46:32,082 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:32,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:32,565 INFO L93 Difference]: Finished difference Result 214 states and 220 transitions. [2022-01-31 19:46:32,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 19:46:32,566 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-01-31 19:46:32,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:32,566 INFO L225 Difference]: With dead ends: 214 [2022-01-31 19:46:32,566 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 19:46:32,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 19:46:32,568 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 245 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:32,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 19 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:46:32,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 19:46:32,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 130. [2022-01-31 19:46:32,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:32,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2022-01-31 19:46:32,591 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 123 [2022-01-31 19:46:32,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:32,591 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2022-01-31 19:46:32,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:32,592 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2022-01-31 19:46:32,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 19:46:32,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:32,592 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:32,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 19:46:32,592 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:32,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:32,593 INFO L85 PathProgramCache]: Analyzing trace with hash 871501345, now seen corresponding path program 19 times [2022-01-31 19:46:32,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:32,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764452221] [2022-01-31 19:46:32,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:32,594 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:32,594 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:32,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:32,597 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:32,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:32,848 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:32,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764452221] [2022-01-31 19:46:32,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1764452221] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:32,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:32,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 19:46:32,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850250627] [2022-01-31 19:46:32,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:32,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:46:32,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:32,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:46:32,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:46:32,851 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:33,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:33,343 INFO L93 Difference]: Finished difference Result 224 states and 230 transitions. [2022-01-31 19:46:33,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 19:46:33,343 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-01-31 19:46:33,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:33,344 INFO L225 Difference]: With dead ends: 224 [2022-01-31 19:46:33,344 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 19:46:33,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 19:46:33,346 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 214 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:33,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 17 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:46:33,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 19:46:33,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2022-01-31 19:46:33,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:33,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2022-01-31 19:46:33,363 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 129 [2022-01-31 19:46:33,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:33,363 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2022-01-31 19:46:33,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:33,363 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2022-01-31 19:46:33,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 19:46:33,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:33,364 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:33,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 19:46:33,365 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:33,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:33,365 INFO L85 PathProgramCache]: Analyzing trace with hash 403311707, now seen corresponding path program 20 times [2022-01-31 19:46:33,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:33,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554599337] [2022-01-31 19:46:33,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:33,367 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:33,367 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:33,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:33,369 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:33,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:33,677 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:33,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554599337] [2022-01-31 19:46:33,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1554599337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:33,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:33,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:46:33,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538403893] [2022-01-31 19:46:33,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:33,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 19:46:33,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:33,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 19:46:33,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-01-31 19:46:33,678 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:34,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:34,182 INFO L93 Difference]: Finished difference Result 234 states and 240 transitions. [2022-01-31 19:46:34,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 19:46:34,183 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-01-31 19:46:34,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:34,184 INFO L225 Difference]: With dead ends: 234 [2022-01-31 19:46:34,184 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 19:46:34,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 19:46:34,186 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 239 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:34,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 21 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:46:34,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 19:46:34,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2022-01-31 19:46:34,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0218978102189782) internal successors, (140), 137 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:34,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2022-01-31 19:46:34,206 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 135 [2022-01-31 19:46:34,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:34,206 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2022-01-31 19:46:34,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2022-01-31 19:46:34,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 19:46:34,207 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:34,207 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:34,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 19:46:34,207 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:34,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:34,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1825093397, now seen corresponding path program 21 times [2022-01-31 19:46:34,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:34,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416355537] [2022-01-31 19:46:34,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:34,209 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:34,209 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:34,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:34,211 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:34,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:34,512 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:34,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416355537] [2022-01-31 19:46:34,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [416355537] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:34,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:34,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 19:46:34,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792448773] [2022-01-31 19:46:34,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:34,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:46:34,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:34,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:46:34,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:46:34,514 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 26 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:35,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:35,038 INFO L93 Difference]: Finished difference Result 244 states and 250 transitions. [2022-01-31 19:46:35,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 19:46:35,038 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-01-31 19:46:35,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:35,039 INFO L225 Difference]: With dead ends: 244 [2022-01-31 19:46:35,039 INFO L226 Difference]: Without dead ends: 151 [2022-01-31 19:46:35,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 19:46:35,040 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 240 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:35,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 25 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:46:35,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-31 19:46:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2022-01-31 19:46:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.020979020979021) internal successors, (146), 143 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:35,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2022-01-31 19:46:35,064 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 141 [2022-01-31 19:46:35,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:35,064 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2022-01-31 19:46:35,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:35,064 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2022-01-31 19:46:35,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 19:46:35,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:35,065 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:35,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 19:46:35,066 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:35,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:35,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1957867087, now seen corresponding path program 22 times [2022-01-31 19:46:35,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:35,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470414254] [2022-01-31 19:46:35,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:35,067 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:35,068 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:35,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:35,069 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:35,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:35,377 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:35,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470414254] [2022-01-31 19:46:35,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [470414254] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:35,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:35,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:46:35,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446232757] [2022-01-31 19:46:35,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:35,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 19:46:35,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:35,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 19:46:35,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:46:35,380 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:35,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:35,874 INFO L93 Difference]: Finished difference Result 254 states and 260 transitions. [2022-01-31 19:46:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 19:46:35,874 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-01-31 19:46:35,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:35,875 INFO L225 Difference]: With dead ends: 254 [2022-01-31 19:46:35,875 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 19:46:35,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 19:46:35,876 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 271 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:35,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 21 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:46:35,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 19:46:35,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2022-01-31 19:46:35,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0201342281879195) internal successors, (152), 149 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:35,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2022-01-31 19:46:35,918 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 147 [2022-01-31 19:46:35,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:35,918 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2022-01-31 19:46:35,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:35,919 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2022-01-31 19:46:35,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-31 19:46:35,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:35,919 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:35,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 19:46:35,920 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:35,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:35,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2052362761, now seen corresponding path program 23 times [2022-01-31 19:46:35,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:35,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717212033] [2022-01-31 19:46:35,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:35,938 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:35,938 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:35,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:35,940 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:36,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:36,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:36,287 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:36,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717212033] [2022-01-31 19:46:36,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1717212033] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:36,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:36,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 19:46:36,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137870194] [2022-01-31 19:46:36,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:36,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:46:36,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:36,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:46:36,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:46:36,289 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:36,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:36,920 INFO L93 Difference]: Finished difference Result 264 states and 270 transitions. [2022-01-31 19:46:36,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 19:46:36,920 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-01-31 19:46:36,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:36,921 INFO L225 Difference]: With dead ends: 264 [2022-01-31 19:46:36,921 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 19:46:36,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 19:46:36,923 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 284 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:36,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 19 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:46:36,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 19:46:36,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 160. [2022-01-31 19:46:36,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0193548387096774) internal successors, (158), 155 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:36,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2022-01-31 19:46:36,951 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 153 [2022-01-31 19:46:36,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:36,951 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2022-01-31 19:46:36,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:36,951 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2022-01-31 19:46:36,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 19:46:36,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:36,952 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:36,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 19:46:36,952 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:36,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:36,952 INFO L85 PathProgramCache]: Analyzing trace with hash 709034563, now seen corresponding path program 24 times [2022-01-31 19:46:36,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:36,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672200656] [2022-01-31 19:46:36,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:36,954 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:36,954 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:36,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:36,955 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:37,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:37,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:37,307 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:37,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672200656] [2022-01-31 19:46:37,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [672200656] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:37,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:37,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:46:37,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721591991] [2022-01-31 19:46:37,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:37,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 19:46:37,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:37,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 19:46:37,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-01-31 19:46:37,309 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 29 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:37,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:37,811 INFO L93 Difference]: Finished difference Result 274 states and 280 transitions. [2022-01-31 19:46:37,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 19:46:37,811 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-01-31 19:46:37,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:37,812 INFO L225 Difference]: With dead ends: 274 [2022-01-31 19:46:37,812 INFO L226 Difference]: Without dead ends: 169 [2022-01-31 19:46:37,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 19:46:37,813 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 283 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:37,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 21 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:46:37,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-31 19:46:37,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2022-01-31 19:46:37,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0186335403726707) internal successors, (164), 161 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:37,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2022-01-31 19:46:37,842 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 159 [2022-01-31 19:46:37,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:37,842 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2022-01-31 19:46:37,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:37,843 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2022-01-31 19:46:37,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 19:46:37,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:37,843 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:37,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 19:46:37,844 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:37,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:37,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1830461181, now seen corresponding path program 25 times [2022-01-31 19:46:37,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:37,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540310351] [2022-01-31 19:46:37,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:37,846 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:37,846 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:37,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:37,848 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:38,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:38,220 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 19:46:38,221 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:38,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540310351] [2022-01-31 19:46:38,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [540310351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:38,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:38,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 19:46:38,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949878] [2022-01-31 19:46:38,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:38,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:46:38,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:38,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:46:38,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:46:38,222 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:38,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:38,920 INFO L93 Difference]: Finished difference Result 284 states and 290 transitions. [2022-01-31 19:46:38,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 19:46:38,921 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-01-31 19:46:38,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:38,921 INFO L225 Difference]: With dead ends: 284 [2022-01-31 19:46:38,921 INFO L226 Difference]: Without dead ends: 175 [2022-01-31 19:46:38,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 19:46:38,923 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 332 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:38,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 19 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:46:38,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-31 19:46:38,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2022-01-31 19:46:38,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0179640718562875) internal successors, (170), 167 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:38,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2022-01-31 19:46:38,948 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 165 [2022-01-31 19:46:38,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:38,948 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2022-01-31 19:46:38,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:38,948 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2022-01-31 19:46:38,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 19:46:38,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:38,949 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:38,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 19:46:38,949 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:38,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:38,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1048573897, now seen corresponding path program 26 times [2022-01-31 19:46:38,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:38,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477797734] [2022-01-31 19:46:38,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:38,951 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:38,951 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:38,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:38,952 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:39,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:39,387 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:39,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477797734] [2022-01-31 19:46:39,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [477797734] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:39,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:39,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:46:39,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898852983] [2022-01-31 19:46:39,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:39,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 19:46:39,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:39,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 19:46:39,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-01-31 19:46:39,388 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand has 31 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:40,081 INFO L93 Difference]: Finished difference Result 294 states and 300 transitions. [2022-01-31 19:46:40,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 19:46:40,081 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-01-31 19:46:40,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:40,082 INFO L225 Difference]: With dead ends: 294 [2022-01-31 19:46:40,082 INFO L226 Difference]: Without dead ends: 181 [2022-01-31 19:46:40,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 19:46:40,083 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 281 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:40,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 27 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:46:40,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-01-31 19:46:40,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2022-01-31 19:46:40,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.0173410404624277) internal successors, (176), 173 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:40,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2022-01-31 19:46:40,109 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 171 [2022-01-31 19:46:40,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:40,109 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2022-01-31 19:46:40,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:40,109 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2022-01-31 19:46:40,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-31 19:46:40,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:40,110 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:40,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 19:46:40,110 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:40,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:40,110 INFO L85 PathProgramCache]: Analyzing trace with hash 371187185, now seen corresponding path program 27 times [2022-01-31 19:46:40,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:40,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697019792] [2022-01-31 19:46:40,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:40,112 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:40,112 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:40,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:40,113 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:40,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:40,512 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:40,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697019792] [2022-01-31 19:46:40,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [697019792] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:40,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:40,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 19:46:40,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762906166] [2022-01-31 19:46:40,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:40,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:46:40,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:40,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:46:40,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:46:40,514 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:41,301 INFO L93 Difference]: Finished difference Result 304 states and 310 transitions. [2022-01-31 19:46:41,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 19:46:41,301 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-01-31 19:46:41,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:41,302 INFO L225 Difference]: With dead ends: 304 [2022-01-31 19:46:41,302 INFO L226 Difference]: Without dead ends: 187 [2022-01-31 19:46:41,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 19:46:41,304 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 334 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:41,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 23 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:46:41,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-31 19:46:41,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2022-01-31 19:46:41,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.0167597765363128) internal successors, (182), 179 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:41,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2022-01-31 19:46:41,342 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 177 [2022-01-31 19:46:41,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:41,342 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2022-01-31 19:46:41,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:41,343 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2022-01-31 19:46:41,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 19:46:41,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:41,343 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:41,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 19:46:41,344 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:41,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:41,344 INFO L85 PathProgramCache]: Analyzing trace with hash 598655019, now seen corresponding path program 28 times [2022-01-31 19:46:41,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:41,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304734274] [2022-01-31 19:46:41,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:41,346 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:41,346 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:41,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:41,348 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:41,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:41,674 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:41,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304734274] [2022-01-31 19:46:41,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [304734274] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:41,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:41,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:46:41,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897712942] [2022-01-31 19:46:41,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:41,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 19:46:41,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:41,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 19:46:41,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:46:41,675 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand has 33 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:42,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:42,383 INFO L93 Difference]: Finished difference Result 314 states and 320 transitions. [2022-01-31 19:46:42,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 19:46:42,383 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-01-31 19:46:42,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:42,384 INFO L225 Difference]: With dead ends: 314 [2022-01-31 19:46:42,384 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 19:46:42,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 19:46:42,386 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 343 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:42,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 21 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:46:42,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 19:46:42,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2022-01-31 19:46:42,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.0162162162162163) internal successors, (188), 185 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2022-01-31 19:46:42,425 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 183 [2022-01-31 19:46:42,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:42,426 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2022-01-31 19:46:42,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:42,426 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2022-01-31 19:46:42,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-31 19:46:42,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:42,427 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:42,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 19:46:42,427 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:42,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:42,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1189695205, now seen corresponding path program 29 times [2022-01-31 19:46:42,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:42,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118751224] [2022-01-31 19:46:42,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:42,429 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:42,429 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:42,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:42,431 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:42,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:42,884 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:42,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118751224] [2022-01-31 19:46:42,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [118751224] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:42,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:42,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 19:46:42,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316488342] [2022-01-31 19:46:42,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:42,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:46:42,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:42,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:46:42,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:46:42,886 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:43,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:43,550 INFO L93 Difference]: Finished difference Result 324 states and 330 transitions. [2022-01-31 19:46:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 19:46:43,550 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-01-31 19:46:43,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:43,551 INFO L225 Difference]: With dead ends: 324 [2022-01-31 19:46:43,551 INFO L226 Difference]: Without dead ends: 199 [2022-01-31 19:46:43,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 19:46:43,552 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 366 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:43,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 19 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:46:43,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-31 19:46:43,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 196. [2022-01-31 19:46:43,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0157068062827226) internal successors, (194), 191 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:43,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2022-01-31 19:46:43,598 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 189 [2022-01-31 19:46:43,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:43,598 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2022-01-31 19:46:43,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:43,598 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2022-01-31 19:46:43,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 19:46:43,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:43,599 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:43,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 19:46:43,599 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:43,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:43,600 INFO L85 PathProgramCache]: Analyzing trace with hash -627824097, now seen corresponding path program 30 times [2022-01-31 19:46:43,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:43,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984299548] [2022-01-31 19:46:43,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:43,601 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:43,601 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:43,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:43,603 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:43,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:43,952 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:43,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984299548] [2022-01-31 19:46:43,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [984299548] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:43,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:43,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:46:43,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61877911] [2022-01-31 19:46:43,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:43,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 19:46:43,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:43,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 19:46:43,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 19:46:43,956 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:44,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:44,618 INFO L93 Difference]: Finished difference Result 334 states and 340 transitions. [2022-01-31 19:46:44,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 19:46:44,618 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-01-31 19:46:44,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:44,619 INFO L225 Difference]: With dead ends: 334 [2022-01-31 19:46:44,619 INFO L226 Difference]: Without dead ends: 205 [2022-01-31 19:46:44,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 19:46:44,621 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 325 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:44,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 29 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:46:44,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-31 19:46:44,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2022-01-31 19:46:44,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.015228426395939) internal successors, (200), 197 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2022-01-31 19:46:44,673 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 195 [2022-01-31 19:46:44,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:44,673 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2022-01-31 19:46:44,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:44,673 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2022-01-31 19:46:44,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 19:46:44,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:44,674 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:44,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 19:46:44,674 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:44,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:44,675 INFO L85 PathProgramCache]: Analyzing trace with hash 293335513, now seen corresponding path program 31 times [2022-01-31 19:46:44,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:44,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288822906] [2022-01-31 19:46:44,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:44,677 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:44,678 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:44,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:44,681 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:45,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:45,183 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:45,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288822906] [2022-01-31 19:46:45,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1288822906] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:45,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:45,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 19:46:45,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124041004] [2022-01-31 19:46:45,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:45,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 19:46:45,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:45,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 19:46:45,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:46:45,185 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand has 36 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:45,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:45,956 INFO L93 Difference]: Finished difference Result 344 states and 350 transitions. [2022-01-31 19:46:45,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 19:46:45,956 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-01-31 19:46:45,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:45,957 INFO L225 Difference]: With dead ends: 344 [2022-01-31 19:46:45,957 INFO L226 Difference]: Without dead ends: 211 [2022-01-31 19:46:45,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 19:46:45,962 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 402 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:45,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 25 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:46:45,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-31 19:46:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2022-01-31 19:46:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.0147783251231528) internal successors, (206), 203 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:46,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2022-01-31 19:46:46,004 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 201 [2022-01-31 19:46:46,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:46,004 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2022-01-31 19:46:46,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:46,004 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2022-01-31 19:46:46,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 19:46:46,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:46,005 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:46,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 19:46:46,005 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:46,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:46,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1349862931, now seen corresponding path program 32 times [2022-01-31 19:46:46,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:46,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351278446] [2022-01-31 19:46:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:46,007 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:46,007 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:46,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:46,009 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:46,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:46,529 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:46,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351278446] [2022-01-31 19:46:46,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1351278446] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:46,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:46,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 19:46:46,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739794581] [2022-01-31 19:46:46,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:46,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 19:46:46,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:46,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 19:46:46,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:46:46,530 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand has 37 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:47,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:47,396 INFO L93 Difference]: Finished difference Result 354 states and 360 transitions. [2022-01-31 19:46:47,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 19:46:47,396 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-01-31 19:46:47,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:47,397 INFO L225 Difference]: With dead ends: 354 [2022-01-31 19:46:47,397 INFO L226 Difference]: Without dead ends: 217 [2022-01-31 19:46:47,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 19:46:47,398 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 395 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:47,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 19 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:46:47,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-01-31 19:46:47,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 214. [2022-01-31 19:46:47,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.014354066985646) internal successors, (212), 209 states have internal predecessors, (212), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:47,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2022-01-31 19:46:47,436 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 207 [2022-01-31 19:46:47,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:47,437 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2022-01-31 19:46:47,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:47,437 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2022-01-31 19:46:47,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-31 19:46:47,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:47,438 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:47,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 19:46:47,438 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:47,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:47,438 INFO L85 PathProgramCache]: Analyzing trace with hash 140297933, now seen corresponding path program 33 times [2022-01-31 19:46:47,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:47,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327315689] [2022-01-31 19:46:47,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:47,441 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:47,441 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:47,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:47,443 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:47,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:47,985 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:47,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327315689] [2022-01-31 19:46:47,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1327315689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:47,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:47,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 19:46:47,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730464854] [2022-01-31 19:46:47,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:47,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:46:47,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:47,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:46:47,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:46:47,988 INFO L87 Difference]: Start difference. First operand 214 states and 216 transitions. Second operand has 38 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:48,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:48,710 INFO L93 Difference]: Finished difference Result 364 states and 370 transitions. [2022-01-31 19:46:48,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 19:46:48,710 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-01-31 19:46:48,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:48,711 INFO L225 Difference]: With dead ends: 364 [2022-01-31 19:46:48,711 INFO L226 Difference]: Without dead ends: 223 [2022-01-31 19:46:48,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 19:46:48,712 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 402 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:48,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 23 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:46:48,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-31 19:46:48,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 220. [2022-01-31 19:46:48,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.013953488372093) internal successors, (218), 215 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:48,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2022-01-31 19:46:48,768 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 213 [2022-01-31 19:46:48,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:48,768 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2022-01-31 19:46:48,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:48,769 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2022-01-31 19:46:48,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 19:46:48,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:48,770 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:48,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 19:46:48,770 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:48,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:48,771 INFO L85 PathProgramCache]: Analyzing trace with hash 269947911, now seen corresponding path program 34 times [2022-01-31 19:46:48,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:48,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500900189] [2022-01-31 19:46:48,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:48,788 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:48,789 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:48,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:48,791 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:49,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:49,411 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:49,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500900189] [2022-01-31 19:46:49,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [500900189] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:49,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:49,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:46:49,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824504135] [2022-01-31 19:46:49,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:49,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 19:46:49,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:49,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 19:46:49,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:46:49,413 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand has 39 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 37 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:50,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:50,491 INFO L93 Difference]: Finished difference Result 374 states and 380 transitions. [2022-01-31 19:46:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 19:46:50,493 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 37 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-01-31 19:46:50,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:50,494 INFO L225 Difference]: With dead ends: 374 [2022-01-31 19:46:50,494 INFO L226 Difference]: Without dead ends: 229 [2022-01-31 19:46:50,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 19:46:50,495 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 373 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:50,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 29 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:46:50,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-31 19:46:50,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2022-01-31 19:46:50,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.0135746606334841) internal successors, (224), 221 states have internal predecessors, (224), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:50,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2022-01-31 19:46:50,536 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 219 [2022-01-31 19:46:50,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:50,537 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2022-01-31 19:46:50,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 37 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:50,537 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2022-01-31 19:46:50,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-31 19:46:50,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:50,538 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:50,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 19:46:50,538 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:50,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:50,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2123419073, now seen corresponding path program 35 times [2022-01-31 19:46:50,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:50,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473041908] [2022-01-31 19:46:50,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:50,540 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:50,540 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:50,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:50,542 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:51,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:51,156 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:51,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473041908] [2022-01-31 19:46:51,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1473041908] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:51,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:51,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 19:46:51,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550197000] [2022-01-31 19:46:51,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:51,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 19:46:51,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:51,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 19:46:51,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:46:51,157 INFO L87 Difference]: Start difference. First operand 226 states and 228 transitions. Second operand has 40 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:52,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:52,271 INFO L93 Difference]: Finished difference Result 384 states and 390 transitions. [2022-01-31 19:46:52,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 19:46:52,271 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 225 [2022-01-31 19:46:52,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:52,272 INFO L225 Difference]: With dead ends: 384 [2022-01-31 19:46:52,272 INFO L226 Difference]: Without dead ends: 235 [2022-01-31 19:46:52,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2188, Invalid=3664, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 19:46:52,273 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 428 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:52,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 25 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:46:52,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-01-31 19:46:52,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2022-01-31 19:46:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 1.013215859030837) internal successors, (230), 227 states have internal predecessors, (230), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 234 transitions. [2022-01-31 19:46:52,330 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 234 transitions. Word has length 225 [2022-01-31 19:46:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:52,331 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 234 transitions. [2022-01-31 19:46:52,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 234 transitions. [2022-01-31 19:46:52,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 19:46:52,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:52,332 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:52,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 19:46:52,333 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:52,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:52,333 INFO L85 PathProgramCache]: Analyzing trace with hash 79598587, now seen corresponding path program 36 times [2022-01-31 19:46:52,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:52,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759282321] [2022-01-31 19:46:52,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:52,335 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:52,335 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:52,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:52,337 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:52,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:52,974 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:52,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759282321] [2022-01-31 19:46:52,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1759282321] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:52,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:52,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 19:46:52,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519087679] [2022-01-31 19:46:52,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:52,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 19:46:52,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:52,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 19:46:52,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 19:46:52,976 INFO L87 Difference]: Start difference. First operand 232 states and 234 transitions. Second operand has 41 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:54,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:54,164 INFO L93 Difference]: Finished difference Result 394 states and 400 transitions. [2022-01-31 19:46:54,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 19:46:54,165 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 231 [2022-01-31 19:46:54,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:54,165 INFO L225 Difference]: With dead ends: 394 [2022-01-31 19:46:54,165 INFO L226 Difference]: Without dead ends: 241 [2022-01-31 19:46:54,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2304, Invalid=3858, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:46:54,166 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 511 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:54,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 19 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:46:54,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-01-31 19:46:54,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 238. [2022-01-31 19:46:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.0128755364806867) internal successors, (236), 233 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 240 transitions. [2022-01-31 19:46:54,211 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 240 transitions. Word has length 231 [2022-01-31 19:46:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:54,211 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 240 transitions. [2022-01-31 19:46:54,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:54,212 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 240 transitions. [2022-01-31 19:46:54,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-01-31 19:46:54,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:54,213 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:54,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 19:46:54,213 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:54,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:54,213 INFO L85 PathProgramCache]: Analyzing trace with hash -946010443, now seen corresponding path program 37 times [2022-01-31 19:46:54,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:54,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765398140] [2022-01-31 19:46:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:54,215 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:54,215 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:54,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:54,217 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:54,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:54,868 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:54,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765398140] [2022-01-31 19:46:54,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1765398140] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:54,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:54,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 19:46:54,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458365336] [2022-01-31 19:46:54,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:54,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 19:46:54,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:54,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 19:46:54,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:46:54,870 INFO L87 Difference]: Start difference. First operand 238 states and 240 transitions. Second operand has 42 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:55,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:55,852 INFO L93 Difference]: Finished difference Result 404 states and 410 transitions. [2022-01-31 19:46:55,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 19:46:55,852 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 237 [2022-01-31 19:46:55,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:55,853 INFO L225 Difference]: With dead ends: 404 [2022-01-31 19:46:55,853 INFO L226 Difference]: Without dead ends: 247 [2022-01-31 19:46:55,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2423, Invalid=4057, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 19:46:55,854 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 442 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:55,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 21 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:46:55,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-01-31 19:46:55,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 244. [2022-01-31 19:46:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:55,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 246 transitions. [2022-01-31 19:46:55,903 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 246 transitions. Word has length 237 [2022-01-31 19:46:55,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:55,903 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 246 transitions. [2022-01-31 19:46:55,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:55,903 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 246 transitions. [2022-01-31 19:46:55,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 19:46:55,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:55,904 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:55,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 19:46:55,904 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:55,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:55,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1171208721, now seen corresponding path program 38 times [2022-01-31 19:46:55,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:55,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109756103] [2022-01-31 19:46:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:55,906 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:55,907 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:55,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:55,909 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:56,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:56,548 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:56,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109756103] [2022-01-31 19:46:56,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2109756103] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:56,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:56,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 19:46:56,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966618139] [2022-01-31 19:46:56,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:56,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 19:46:56,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:56,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 19:46:56,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 19:46:56,549 INFO L87 Difference]: Start difference. First operand 244 states and 246 transitions. Second operand has 43 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:57,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:57,645 INFO L93 Difference]: Finished difference Result 414 states and 420 transitions. [2022-01-31 19:46:57,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 19:46:57,645 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2022-01-31 19:46:57,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:57,646 INFO L225 Difference]: With dead ends: 414 [2022-01-31 19:46:57,646 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 19:46:57,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2545, Invalid=4261, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 19:46:57,647 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 555 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:57,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 19 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [503 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:46:57,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 19:46:57,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 250. [2022-01-31 19:46:57,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.0122448979591836) internal successors, (248), 245 states have internal predecessors, (248), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:57,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 252 transitions. [2022-01-31 19:46:57,717 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 252 transitions. Word has length 243 [2022-01-31 19:46:57,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:57,718 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 252 transitions. [2022-01-31 19:46:57,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:57,718 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 252 transitions. [2022-01-31 19:46:57,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-01-31 19:46:57,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:57,719 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:57,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 19:46:57,719 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:57,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:57,719 INFO L85 PathProgramCache]: Analyzing trace with hash 2005299625, now seen corresponding path program 39 times [2022-01-31 19:46:57,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:57,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116930273] [2022-01-31 19:46:57,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:57,721 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:57,721 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:57,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:57,724 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:58,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:58,461 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:58,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116930273] [2022-01-31 19:46:58,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [116930273] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:58,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:58,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 19:46:58,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255194763] [2022-01-31 19:46:58,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:58,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 19:46:58,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:58,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 19:46:58,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:46:58,463 INFO L87 Difference]: Start difference. First operand 250 states and 252 transitions. Second operand has 44 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:59,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:59,455 INFO L93 Difference]: Finished difference Result 424 states and 430 transitions. [2022-01-31 19:46:59,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 19:46:59,456 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 249 [2022-01-31 19:46:59,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:59,457 INFO L225 Difference]: With dead ends: 424 [2022-01-31 19:46:59,457 INFO L226 Difference]: Without dead ends: 259 [2022-01-31 19:46:59,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2670, Invalid=4470, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 19:46:59,458 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 536 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:59,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 18 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:46:59,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-31 19:46:59,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 256. [2022-01-31 19:46:59,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.0119521912350598) internal successors, (254), 251 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:59,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 258 transitions. [2022-01-31 19:46:59,512 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 258 transitions. Word has length 249 [2022-01-31 19:46:59,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:59,512 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 258 transitions. [2022-01-31 19:46:59,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:59,512 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 258 transitions. [2022-01-31 19:46:59,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-31 19:46:59,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:59,513 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:59,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 19:46:59,513 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:59,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:59,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1666012701, now seen corresponding path program 40 times [2022-01-31 19:46:59,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:59,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435722131] [2022-01-31 19:46:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:59,516 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:59,516 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:59,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:59,522 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:00,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:00,228 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:00,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435722131] [2022-01-31 19:47:00,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1435722131] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:00,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:00,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 19:47:00,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946511101] [2022-01-31 19:47:00,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:00,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 19:47:00,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:00,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 19:47:00,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 19:47:00,233 INFO L87 Difference]: Start difference. First operand 256 states and 258 transitions. Second operand has 45 states, 44 states have (on average 2.159090909090909) internal successors, (95), 43 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:01,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:01,223 INFO L93 Difference]: Finished difference Result 434 states and 440 transitions. [2022-01-31 19:47:01,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 19:47:01,224 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.159090909090909) internal successors, (95), 43 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2022-01-31 19:47:01,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:01,224 INFO L225 Difference]: With dead ends: 434 [2022-01-31 19:47:01,225 INFO L226 Difference]: Without dead ends: 265 [2022-01-31 19:47:01,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2798, Invalid=4684, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 19:47:01,226 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 467 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:01,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 23 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:47:01,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-01-31 19:47:01,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2022-01-31 19:47:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 257 states have (on average 1.0116731517509727) internal successors, (260), 257 states have internal predecessors, (260), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 264 transitions. [2022-01-31 19:47:01,300 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 264 transitions. Word has length 255 [2022-01-31 19:47:01,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:01,300 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 264 transitions. [2022-01-31 19:47:01,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.159090909090909) internal successors, (95), 43 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 264 transitions. [2022-01-31 19:47:01,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-01-31 19:47:01,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:01,302 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:01,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 19:47:01,302 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:01,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:01,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1563292003, now seen corresponding path program 41 times [2022-01-31 19:47:01,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:01,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698991539] [2022-01-31 19:47:01,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:01,305 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:01,305 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:01,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:01,308 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:01,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:01,862 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:01,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698991539] [2022-01-31 19:47:01,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [698991539] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:01,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:01,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 19:47:01,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919141288] [2022-01-31 19:47:01,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:01,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 19:47:01,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:01,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 19:47:01,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 19:47:01,863 INFO L87 Difference]: Start difference. First operand 262 states and 264 transitions. Second operand has 46 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:02,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:02,888 INFO L93 Difference]: Finished difference Result 444 states and 450 transitions. [2022-01-31 19:47:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 19:47:02,888 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 261 [2022-01-31 19:47:02,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:02,889 INFO L225 Difference]: With dead ends: 444 [2022-01-31 19:47:02,889 INFO L226 Difference]: Without dead ends: 271 [2022-01-31 19:47:02,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2929, Invalid=4903, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 19:47:02,890 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 568 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 511 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 511 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:02,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 23 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [511 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:47:02,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-01-31 19:47:02,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 268. [2022-01-31 19:47:02,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 263 states have (on average 1.0114068441064639) internal successors, (266), 263 states have internal predecessors, (266), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:02,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 270 transitions. [2022-01-31 19:47:02,946 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 270 transitions. Word has length 261 [2022-01-31 19:47:02,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:02,946 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 270 transitions. [2022-01-31 19:47:02,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:02,947 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 270 transitions. [2022-01-31 19:47:02,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-31 19:47:02,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:02,948 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:02,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 19:47:02,948 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:02,948 INFO L85 PathProgramCache]: Analyzing trace with hash 956907479, now seen corresponding path program 42 times [2022-01-31 19:47:02,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:02,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432260737] [2022-01-31 19:47:02,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:02,950 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:02,950 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:02,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:02,953 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:03,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:03,608 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:03,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432260737] [2022-01-31 19:47:03,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1432260737] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:03,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:03,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 19:47:03,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054159835] [2022-01-31 19:47:03,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:03,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 19:47:03,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:03,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 19:47:03,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 19:47:03,609 INFO L87 Difference]: Start difference. First operand 268 states and 270 transitions. Second operand has 47 states, 46 states have (on average 2.152173913043478) internal successors, (99), 45 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:04,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:04,751 INFO L93 Difference]: Finished difference Result 454 states and 460 transitions. [2022-01-31 19:47:04,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 19:47:04,752 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.152173913043478) internal successors, (99), 45 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2022-01-31 19:47:04,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:04,753 INFO L225 Difference]: With dead ends: 454 [2022-01-31 19:47:04,753 INFO L226 Difference]: Without dead ends: 277 [2022-01-31 19:47:04,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3063, Invalid=5127, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 19:47:04,754 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 493 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:04,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 25 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:47:04,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-01-31 19:47:04,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 274. [2022-01-31 19:47:04,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 269 states have (on average 1.0111524163568772) internal successors, (272), 269 states have internal predecessors, (272), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:04,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 276 transitions. [2022-01-31 19:47:04,839 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 276 transitions. Word has length 267 [2022-01-31 19:47:04,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:04,840 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 276 transitions. [2022-01-31 19:47:04,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.152173913043478) internal successors, (99), 45 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:04,841 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 276 transitions. [2022-01-31 19:47:04,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-01-31 19:47:04,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:04,843 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:04,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 19:47:04,843 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:04,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:04,843 INFO L85 PathProgramCache]: Analyzing trace with hash 512023953, now seen corresponding path program 43 times [2022-01-31 19:47:04,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:04,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980239310] [2022-01-31 19:47:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:04,846 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:04,846 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:04,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:04,850 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:05,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:05,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:05,573 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:05,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980239310] [2022-01-31 19:47:05,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [980239310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:05,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:05,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 19:47:05,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822351567] [2022-01-31 19:47:05,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:05,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 19:47:05,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:05,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 19:47:05,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:47:05,575 INFO L87 Difference]: Start difference. First operand 274 states and 276 transitions. Second operand has 48 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:06,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:06,653 INFO L93 Difference]: Finished difference Result 464 states and 470 transitions. [2022-01-31 19:47:06,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 19:47:06,653 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 273 [2022-01-31 19:47:06,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:06,654 INFO L225 Difference]: With dead ends: 464 [2022-01-31 19:47:06,654 INFO L226 Difference]: Without dead ends: 283 [2022-01-31 19:47:06,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3200, Invalid=5356, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 19:47:06,655 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 498 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:06,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 25 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:47:06,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-31 19:47:06,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 280. [2022-01-31 19:47:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.010909090909091) internal successors, (278), 275 states have internal predecessors, (278), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:06,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 282 transitions. [2022-01-31 19:47:06,718 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 282 transitions. Word has length 273 [2022-01-31 19:47:06,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:06,718 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 282 transitions. [2022-01-31 19:47:06,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:06,718 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 282 transitions. [2022-01-31 19:47:06,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-01-31 19:47:06,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:06,719 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:06,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 19:47:06,719 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:06,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:06,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2088339403, now seen corresponding path program 44 times [2022-01-31 19:47:06,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:06,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351896696] [2022-01-31 19:47:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:06,729 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:06,729 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:06,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:06,732 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:07,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:07,590 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 19:47:07,590 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:07,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351896696] [2022-01-31 19:47:07,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [351896696] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:07,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:07,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 19:47:07,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003712625] [2022-01-31 19:47:07,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:07,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 19:47:07,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:07,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 19:47:07,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 19:47:07,591 INFO L87 Difference]: Start difference. First operand 280 states and 282 transitions. Second operand has 49 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 47 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:09,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:09,079 INFO L93 Difference]: Finished difference Result 474 states and 480 transitions. [2022-01-31 19:47:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 19:47:09,079 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 47 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2022-01-31 19:47:09,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:09,080 INFO L225 Difference]: With dead ends: 474 [2022-01-31 19:47:09,080 INFO L226 Difference]: Without dead ends: 289 [2022-01-31 19:47:09,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3340, Invalid=5590, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 19:47:09,096 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 585 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:09,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 21 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:47:09,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-01-31 19:47:09,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 286. [2022-01-31 19:47:09,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 281 states have (on average 1.01067615658363) internal successors, (284), 281 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:09,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 288 transitions. [2022-01-31 19:47:09,176 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 288 transitions. Word has length 279 [2022-01-31 19:47:09,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:09,176 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 288 transitions. [2022-01-31 19:47:09,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 47 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:09,176 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 288 transitions. [2022-01-31 19:47:09,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-01-31 19:47:09,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:09,192 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:09,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 19:47:09,192 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:09,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:09,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1071391099, now seen corresponding path program 45 times [2022-01-31 19:47:09,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:09,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117439074] [2022-01-31 19:47:09,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:09,194 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:09,194 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:09,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:09,197 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:10,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:10,125 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:10,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117439074] [2022-01-31 19:47:10,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1117439074] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:10,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:10,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 19:47:10,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083698965] [2022-01-31 19:47:10,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:10,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 19:47:10,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:10,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 19:47:10,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 19:47:10,127 INFO L87 Difference]: Start difference. First operand 286 states and 288 transitions. Second operand has 50 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:11,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:11,823 INFO L93 Difference]: Finished difference Result 484 states and 490 transitions. [2022-01-31 19:47:11,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 19:47:11,823 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 285 [2022-01-31 19:47:11,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:11,824 INFO L225 Difference]: With dead ends: 484 [2022-01-31 19:47:11,824 INFO L226 Difference]: Without dead ends: 295 [2022-01-31 19:47:11,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3483, Invalid=5829, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 19:47:11,826 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 702 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 648 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 648 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:11,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 19 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [648 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:47:11,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-01-31 19:47:11,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 292. [2022-01-31 19:47:11,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 287 states have (on average 1.0104529616724738) internal successors, (290), 287 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:11,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 294 transitions. [2022-01-31 19:47:11,915 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 294 transitions. Word has length 285 [2022-01-31 19:47:11,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:11,915 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 294 transitions. [2022-01-31 19:47:11,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:11,915 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 294 transitions. [2022-01-31 19:47:11,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 19:47:11,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:11,916 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:11,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 19:47:11,916 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:11,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:11,917 INFO L85 PathProgramCache]: Analyzing trace with hash -188186177, now seen corresponding path program 46 times [2022-01-31 19:47:11,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:11,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355442792] [2022-01-31 19:47:11,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:11,918 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:11,918 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:11,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:11,921 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:12,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:12,797 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 19:47:12,798 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:12,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355442792] [2022-01-31 19:47:12,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [355442792] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:12,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:12,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 19:47:12,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68860196] [2022-01-31 19:47:12,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:12,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 19:47:12,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:12,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 19:47:12,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=1369, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 19:47:12,799 INFO L87 Difference]: Start difference. First operand 292 states and 294 transitions. Second operand has 51 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:13,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:13,985 INFO L93 Difference]: Finished difference Result 494 states and 500 transitions. [2022-01-31 19:47:13,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 19:47:13,989 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 291 [2022-01-31 19:47:13,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:13,990 INFO L225 Difference]: With dead ends: 494 [2022-01-31 19:47:13,990 INFO L226 Difference]: Without dead ends: 301 [2022-01-31 19:47:13,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3629, Invalid=6073, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 19:47:13,991 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 555 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:13,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 21 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:47:13,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-31 19:47:14,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 298. [2022-01-31 19:47:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.0102389078498293) internal successors, (296), 293 states have internal predecessors, (296), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:14,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 300 transitions. [2022-01-31 19:47:14,060 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 300 transitions. Word has length 291 [2022-01-31 19:47:14,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:14,061 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 300 transitions. [2022-01-31 19:47:14,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:14,061 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 300 transitions. [2022-01-31 19:47:14,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-01-31 19:47:14,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:14,062 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:14,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 19:47:14,062 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:14,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:14,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1649143431, now seen corresponding path program 47 times [2022-01-31 19:47:14,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:14,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002490038] [2022-01-31 19:47:14,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:14,064 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:14,064 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:14,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:14,066 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:14,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:14,728 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:14,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002490038] [2022-01-31 19:47:14,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1002490038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:14,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:14,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 19:47:14,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307052992] [2022-01-31 19:47:14,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:14,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 19:47:14,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:14,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 19:47:14,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 19:47:14,729 INFO L87 Difference]: Start difference. First operand 298 states and 300 transitions. Second operand has 52 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 50 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:16,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:16,256 INFO L93 Difference]: Finished difference Result 504 states and 510 transitions. [2022-01-31 19:47:16,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 19:47:16,257 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 50 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 297 [2022-01-31 19:47:16,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:16,257 INFO L225 Difference]: With dead ends: 504 [2022-01-31 19:47:16,258 INFO L226 Difference]: Without dead ends: 307 [2022-01-31 19:47:16,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3778, Invalid=6322, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 19:47:16,259 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 642 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:16,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 21 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:47:16,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-01-31 19:47:16,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 304. [2022-01-31 19:47:16,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 299 states have (on average 1.0100334448160535) internal successors, (302), 299 states have internal predecessors, (302), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:16,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 306 transitions. [2022-01-31 19:47:16,330 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 306 transitions. Word has length 297 [2022-01-31 19:47:16,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:16,330 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 306 transitions. [2022-01-31 19:47:16,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 50 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:16,331 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 306 transitions. [2022-01-31 19:47:16,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-01-31 19:47:16,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:16,332 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:16,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 19:47:16,332 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:16,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:16,332 INFO L85 PathProgramCache]: Analyzing trace with hash 272313779, now seen corresponding path program 48 times [2022-01-31 19:47:16,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:16,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216566836] [2022-01-31 19:47:16,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:16,334 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:16,334 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:16,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:16,336 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:17,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:17,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:17,376 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:17,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216566836] [2022-01-31 19:47:17,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [216566836] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:17,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:17,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 19:47:17,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942749366] [2022-01-31 19:47:17,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:17,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 19:47:17,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:17,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 19:47:17,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1476, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 19:47:17,378 INFO L87 Difference]: Start difference. First operand 304 states and 306 transitions. Second operand has 53 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 51 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:19,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:19,019 INFO L93 Difference]: Finished difference Result 514 states and 520 transitions. [2022-01-31 19:47:19,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 19:47:19,020 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 51 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 303 [2022-01-31 19:47:19,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:19,021 INFO L225 Difference]: With dead ends: 514 [2022-01-31 19:47:19,021 INFO L226 Difference]: Without dead ends: 313 [2022-01-31 19:47:19,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3930, Invalid=6576, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 19:47:19,022 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 617 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 554 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 554 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:19,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 19 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [554 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:47:19,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-01-31 19:47:19,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 310. [2022-01-31 19:47:19,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 305 states have (on average 1.0098360655737706) internal successors, (308), 305 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:19,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 312 transitions. [2022-01-31 19:47:19,099 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 312 transitions. Word has length 303 [2022-01-31 19:47:19,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:19,099 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 312 transitions. [2022-01-31 19:47:19,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 51 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:19,099 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 312 transitions. [2022-01-31 19:47:19,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-01-31 19:47:19,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:19,100 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:19,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 19:47:19,100 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:19,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:19,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1304065645, now seen corresponding path program 49 times [2022-01-31 19:47:19,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:19,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090052471] [2022-01-31 19:47:19,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:19,102 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:19,102 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:19,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:19,105 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:20,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:20,039 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 19:47:20,039 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:20,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090052471] [2022-01-31 19:47:20,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2090052471] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:20,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:20,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 19:47:20,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095290688] [2022-01-31 19:47:20,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:20,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 19:47:20,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:20,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 19:47:20,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 19:47:20,041 INFO L87 Difference]: Start difference. First operand 310 states and 312 transitions. Second operand has 54 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:21,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:21,879 INFO L93 Difference]: Finished difference Result 524 states and 530 transitions. [2022-01-31 19:47:21,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 19:47:21,879 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 309 [2022-01-31 19:47:21,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:21,880 INFO L225 Difference]: With dead ends: 524 [2022-01-31 19:47:21,880 INFO L226 Difference]: Without dead ends: 319 [2022-01-31 19:47:21,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4085, Invalid=6835, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 19:47:21,885 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 696 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:21,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 21 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:47:21,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-31 19:47:21,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 316. [2022-01-31 19:47:21,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 311 states have (on average 1.0096463022508038) internal successors, (314), 311 states have internal predecessors, (314), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:21,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 318 transitions. [2022-01-31 19:47:21,962 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 318 transitions. Word has length 309 [2022-01-31 19:47:21,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:21,962 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 318 transitions. [2022-01-31 19:47:21,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:21,962 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 318 transitions. [2022-01-31 19:47:21,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-01-31 19:47:21,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:21,964 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:21,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 19:47:21,964 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:21,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:21,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1570147239, now seen corresponding path program 50 times [2022-01-31 19:47:21,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:21,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293066895] [2022-01-31 19:47:21,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:21,965 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:21,965 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:21,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:21,968 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:23,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:23,027 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 19:47:23,027 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:23,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293066895] [2022-01-31 19:47:23,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [293066895] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:23,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:23,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 19:47:23,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397259821] [2022-01-31 19:47:23,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:23,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 19:47:23,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:23,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 19:47:23,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 19:47:23,029 INFO L87 Difference]: Start difference. First operand 316 states and 318 transitions. Second operand has 55 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 53 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:24,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:24,714 INFO L93 Difference]: Finished difference Result 534 states and 540 transitions. [2022-01-31 19:47:24,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 19:47:24,714 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 53 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 315 [2022-01-31 19:47:24,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:24,715 INFO L225 Difference]: With dead ends: 534 [2022-01-31 19:47:24,715 INFO L226 Difference]: Without dead ends: 325 [2022-01-31 19:47:24,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4243, Invalid=7099, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 19:47:24,716 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 619 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 555 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:24,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 19 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [555 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:47:24,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-01-31 19:47:24,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 322. [2022-01-31 19:47:24,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 317 states have (on average 1.0094637223974763) internal successors, (320), 317 states have internal predecessors, (320), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 324 transitions. [2022-01-31 19:47:24,817 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 324 transitions. Word has length 315 [2022-01-31 19:47:24,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:24,817 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 324 transitions. [2022-01-31 19:47:24,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 53 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:24,817 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 324 transitions. [2022-01-31 19:47:24,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-01-31 19:47:24,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:24,818 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:24,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 19:47:24,818 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:24,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:24,819 INFO L85 PathProgramCache]: Analyzing trace with hash 658247009, now seen corresponding path program 51 times [2022-01-31 19:47:24,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:24,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421498687] [2022-01-31 19:47:24,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:24,820 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:24,820 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:24,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:24,823 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:25,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:25,773 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:25,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421498687] [2022-01-31 19:47:25,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1421498687] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:25,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:25,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 19:47:25,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854121932] [2022-01-31 19:47:25,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:25,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 19:47:25,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:25,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 19:47:25,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 19:47:25,774 INFO L87 Difference]: Start difference. First operand 322 states and 324 transitions. Second operand has 56 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:27,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:27,696 INFO L93 Difference]: Finished difference Result 544 states and 550 transitions. [2022-01-31 19:47:27,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 19:47:27,696 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 321 [2022-01-31 19:47:27,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:27,697 INFO L225 Difference]: With dead ends: 544 [2022-01-31 19:47:27,697 INFO L226 Difference]: Without dead ends: 331 [2022-01-31 19:47:27,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4404, Invalid=7368, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 19:47:27,698 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 714 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 646 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 646 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:27,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 19 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [646 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:47:27,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-01-31 19:47:27,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 328. [2022-01-31 19:47:27,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 323 states have (on average 1.0092879256965945) internal successors, (326), 323 states have internal predecessors, (326), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:27,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 330 transitions. [2022-01-31 19:47:27,793 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 330 transitions. Word has length 321 [2022-01-31 19:47:27,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:27,793 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 330 transitions. [2022-01-31 19:47:27,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:27,793 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 330 transitions. [2022-01-31 19:47:27,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-01-31 19:47:27,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:27,795 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:27,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 19:47:27,795 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:27,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:27,795 INFO L85 PathProgramCache]: Analyzing trace with hash -870343781, now seen corresponding path program 52 times [2022-01-31 19:47:27,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:27,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658018638] [2022-01-31 19:47:27,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:27,797 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:27,797 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:27,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:27,801 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:28,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:28,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:28,632 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:28,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658018638] [2022-01-31 19:47:28,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [658018638] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:28,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:28,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 19:47:28,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864110185] [2022-01-31 19:47:28,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:28,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 19:47:28,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:28,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 19:47:28,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1490, Invalid=1702, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 19:47:28,634 INFO L87 Difference]: Start difference. First operand 328 states and 330 transitions. Second operand has 57 states, 56 states have (on average 2.125) internal successors, (119), 55 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:30,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:30,113 INFO L93 Difference]: Finished difference Result 554 states and 560 transitions. [2022-01-31 19:47:30,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 19:47:30,113 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 2.125) internal successors, (119), 55 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 327 [2022-01-31 19:47:30,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:30,114 INFO L225 Difference]: With dead ends: 554 [2022-01-31 19:47:30,114 INFO L226 Difference]: Without dead ends: 337 [2022-01-31 19:47:30,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4568, Invalid=7642, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 19:47:30,116 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 699 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 635 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 635 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:30,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 19 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [635 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:47:30,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-01-31 19:47:30,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 334. [2022-01-31 19:47:30,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 329 states have (on average 1.0091185410334347) internal successors, (332), 329 states have internal predecessors, (332), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:30,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 336 transitions. [2022-01-31 19:47:30,234 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 336 transitions. Word has length 327 [2022-01-31 19:47:30,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:30,234 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 336 transitions. [2022-01-31 19:47:30,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 2.125) internal successors, (119), 55 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:30,234 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 336 transitions. [2022-01-31 19:47:30,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-01-31 19:47:30,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:30,239 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:30,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 19:47:30,239 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:30,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:30,239 INFO L85 PathProgramCache]: Analyzing trace with hash -2118265259, now seen corresponding path program 53 times [2022-01-31 19:47:30,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:30,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573152382] [2022-01-31 19:47:30,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:30,241 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:30,241 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:30,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:30,252 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:31,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:31,353 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:31,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573152382] [2022-01-31 19:47:31,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1573152382] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:31,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:31,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 19:47:31,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754626270] [2022-01-31 19:47:31,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:31,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 19:47:31,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:31,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 19:47:31,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1545, Invalid=1761, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:47:31,356 INFO L87 Difference]: Start difference. First operand 334 states and 336 transitions. Second operand has 58 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:33,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:33,081 INFO L93 Difference]: Finished difference Result 564 states and 570 transitions. [2022-01-31 19:47:33,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 19:47:33,081 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 333 [2022-01-31 19:47:33,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:33,082 INFO L225 Difference]: With dead ends: 564 [2022-01-31 19:47:33,082 INFO L226 Difference]: Without dead ends: 343 [2022-01-31 19:47:33,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4735, Invalid=7921, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 19:47:33,083 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 754 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 688 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 688 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:33,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 27 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [688 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:47:33,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-01-31 19:47:33,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 340. [2022-01-31 19:47:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 335 states have (on average 1.008955223880597) internal successors, (338), 335 states have internal predecessors, (338), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 342 transitions. [2022-01-31 19:47:33,174 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 342 transitions. Word has length 333 [2022-01-31 19:47:33,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:33,174 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 342 transitions. [2022-01-31 19:47:33,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:33,175 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 342 transitions. [2022-01-31 19:47:33,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-01-31 19:47:33,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:33,176 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:33,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 19:47:33,176 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:33,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:33,176 INFO L85 PathProgramCache]: Analyzing trace with hash -342139505, now seen corresponding path program 54 times [2022-01-31 19:47:33,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:33,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819305035] [2022-01-31 19:47:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:33,178 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:33,178 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:33,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:33,181 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:34,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:34,415 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:34,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819305035] [2022-01-31 19:47:34,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [819305035] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:34,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:34,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 19:47:34,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770075789] [2022-01-31 19:47:34,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:34,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 19:47:34,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:34,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 19:47:34,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=1821, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 19:47:34,417 INFO L87 Difference]: Start difference. First operand 340 states and 342 transitions. Second operand has 59 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 57 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:36,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:36,333 INFO L93 Difference]: Finished difference Result 574 states and 580 transitions. [2022-01-31 19:47:36,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 19:47:36,333 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 57 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 339 [2022-01-31 19:47:36,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:36,334 INFO L225 Difference]: With dead ends: 574 [2022-01-31 19:47:36,334 INFO L226 Difference]: Without dead ends: 349 [2022-01-31 19:47:36,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4905, Invalid=8205, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 19:47:36,336 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 691 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:36,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [691 Valid, 19 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:47:36,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-31 19:47:36,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 346. [2022-01-31 19:47:36,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 341 states have (on average 1.0087976539589443) internal successors, (344), 341 states have internal predecessors, (344), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:36,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 348 transitions. [2022-01-31 19:47:36,435 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 348 transitions. Word has length 339 [2022-01-31 19:47:36,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:36,435 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 348 transitions. [2022-01-31 19:47:36,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 57 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:36,435 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 348 transitions. [2022-01-31 19:47:36,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-01-31 19:47:36,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:36,437 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:36,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 19:47:36,437 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:36,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:36,437 INFO L85 PathProgramCache]: Analyzing trace with hash -180039351, now seen corresponding path program 55 times [2022-01-31 19:47:36,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:36,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622251720] [2022-01-31 19:47:36,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:36,439 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:36,439 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:36,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:36,443 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:37,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:37,403 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:37,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622251720] [2022-01-31 19:47:37,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [622251720] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:37,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:37,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 19:47:37,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458528220] [2022-01-31 19:47:37,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:37,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 19:47:37,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:37,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 19:47:37,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1658, Invalid=1882, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 19:47:37,405 INFO L87 Difference]: Start difference. First operand 346 states and 348 transitions. Second operand has 60 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 58 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:39,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:39,056 INFO L93 Difference]: Finished difference Result 584 states and 590 transitions. [2022-01-31 19:47:39,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 19:47:39,056 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 58 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 345 [2022-01-31 19:47:39,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:39,057 INFO L225 Difference]: With dead ends: 584 [2022-01-31 19:47:39,057 INFO L226 Difference]: Without dead ends: 355 [2022-01-31 19:47:39,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1651 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5078, Invalid=8494, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 19:47:39,058 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 678 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:39,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 23 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:47:39,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-01-31 19:47:39,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 352. [2022-01-31 19:47:39,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 347 states have (on average 1.0086455331412103) internal successors, (350), 347 states have internal predecessors, (350), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:39,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 354 transitions. [2022-01-31 19:47:39,153 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 354 transitions. Word has length 345 [2022-01-31 19:47:39,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:39,153 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 354 transitions. [2022-01-31 19:47:39,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 58 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:39,153 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 354 transitions. [2022-01-31 19:47:39,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-01-31 19:47:39,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:39,155 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:39,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 19:47:39,155 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:39,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:39,155 INFO L85 PathProgramCache]: Analyzing trace with hash 743362947, now seen corresponding path program 56 times [2022-01-31 19:47:39,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:39,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529896583] [2022-01-31 19:47:39,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:39,157 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:39,157 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:39,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:39,160 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:40,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:40,310 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:40,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529896583] [2022-01-31 19:47:40,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1529896583] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:40,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:40,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 19:47:40,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250067692] [2022-01-31 19:47:40,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:40,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 19:47:40,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:40,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 19:47:40,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1716, Invalid=1944, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 19:47:40,312 INFO L87 Difference]: Start difference. First operand 352 states and 354 transitions. Second operand has 61 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 59 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:42,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:42,152 INFO L93 Difference]: Finished difference Result 594 states and 600 transitions. [2022-01-31 19:47:42,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 19:47:42,152 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 59 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 351 [2022-01-31 19:47:42,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:42,153 INFO L225 Difference]: With dead ends: 594 [2022-01-31 19:47:42,153 INFO L226 Difference]: Without dead ends: 361 [2022-01-31 19:47:42,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5254, Invalid=8788, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 19:47:42,157 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 779 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 711 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 711 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:42,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 19 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [711 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:47:42,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-01-31 19:47:42,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 358. [2022-01-31 19:47:42,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 353 states have (on average 1.0084985835694051) internal successors, (356), 353 states have internal predecessors, (356), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:42,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 360 transitions. [2022-01-31 19:47:42,256 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 360 transitions. Word has length 351 [2022-01-31 19:47:42,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:42,256 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 360 transitions. [2022-01-31 19:47:42,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 59 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:42,257 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 360 transitions. [2022-01-31 19:47:42,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-01-31 19:47:42,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:42,258 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:42,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 19:47:42,258 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:42,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:42,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1705640387, now seen corresponding path program 57 times [2022-01-31 19:47:42,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:42,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687734159] [2022-01-31 19:47:42,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:42,260 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:42,260 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:42,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:42,263 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:43,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:43,230 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:43,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687734159] [2022-01-31 19:47:43,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1687734159] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:43,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:43,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 19:47:43,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620241764] [2022-01-31 19:47:43,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:43,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 19:47:43,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:43,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 19:47:43,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1775, Invalid=2007, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 19:47:43,232 INFO L87 Difference]: Start difference. First operand 358 states and 360 transitions. Second operand has 62 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:44,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:44,950 INFO L93 Difference]: Finished difference Result 604 states and 610 transitions. [2022-01-31 19:47:44,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 19:47:44,951 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 357 [2022-01-31 19:47:44,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:44,952 INFO L225 Difference]: With dead ends: 604 [2022-01-31 19:47:44,952 INFO L226 Difference]: Without dead ends: 367 [2022-01-31 19:47:44,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1768 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5433, Invalid=9087, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 19:47:44,953 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 680 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:44,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [680 Valid, 29 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:47:44,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-01-31 19:47:45,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 364. [2022-01-31 19:47:45,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 359 states have (on average 1.0083565459610029) internal successors, (362), 359 states have internal predecessors, (362), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:45,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 366 transitions. [2022-01-31 19:47:45,055 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 366 transitions. Word has length 357 [2022-01-31 19:47:45,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:45,055 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 366 transitions. [2022-01-31 19:47:45,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:45,055 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 366 transitions. [2022-01-31 19:47:45,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-01-31 19:47:45,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:45,056 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:45,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 19:47:45,056 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:45,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:45,057 INFO L85 PathProgramCache]: Analyzing trace with hash 520025975, now seen corresponding path program 58 times [2022-01-31 19:47:45,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:45,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662818222] [2022-01-31 19:47:45,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:45,058 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:45,058 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:45,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:45,062 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:45,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:45,922 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:45,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662818222] [2022-01-31 19:47:45,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1662818222] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:45,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:45,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 19:47:45,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848198358] [2022-01-31 19:47:45,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:45,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 19:47:45,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:45,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 19:47:45,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1835, Invalid=2071, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 19:47:45,924 INFO L87 Difference]: Start difference. First operand 364 states and 366 transitions. Second operand has 63 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 61 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:47,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:47,645 INFO L93 Difference]: Finished difference Result 614 states and 620 transitions. [2022-01-31 19:47:47,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 19:47:47,645 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 61 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 363 [2022-01-31 19:47:47,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:47,646 INFO L225 Difference]: With dead ends: 614 [2022-01-31 19:47:47,646 INFO L226 Difference]: Without dead ends: 373 [2022-01-31 19:47:47,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5615, Invalid=9391, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 19:47:47,648 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 681 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:47,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 25 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:47:47,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-01-31 19:47:47,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 370. [2022-01-31 19:47:47,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 365 states have (on average 1.0082191780821919) internal successors, (368), 365 states have internal predecessors, (368), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:47,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 372 transitions. [2022-01-31 19:47:47,761 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 372 transitions. Word has length 363 [2022-01-31 19:47:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:47,761 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 372 transitions. [2022-01-31 19:47:47,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 61 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 372 transitions. [2022-01-31 19:47:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-01-31 19:47:47,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:47,763 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:47,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 19:47:47,763 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:47,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:47,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1240882481, now seen corresponding path program 59 times [2022-01-31 19:47:47,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:47,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305942399] [2022-01-31 19:47:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:47,764 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:47,765 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:47,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:47,769 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:48,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:48,719 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 19:47:48,720 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:48,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305942399] [2022-01-31 19:47:48,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [305942399] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:48,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:48,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 19:47:48,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211755199] [2022-01-31 19:47:48,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:48,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 19:47:48,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:48,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 19:47:48,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1896, Invalid=2136, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 19:47:48,721 INFO L87 Difference]: Start difference. First operand 370 states and 372 transitions. Second operand has 64 states, 63 states have (on average 2.111111111111111) internal successors, (133), 62 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:50,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:50,968 INFO L93 Difference]: Finished difference Result 624 states and 630 transitions. [2022-01-31 19:47:50,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 19:47:50,968 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 2.111111111111111) internal successors, (133), 62 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 369 [2022-01-31 19:47:50,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:50,969 INFO L225 Difference]: With dead ends: 624 [2022-01-31 19:47:50,969 INFO L226 Difference]: Without dead ends: 379 [2022-01-31 19:47:50,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5800, Invalid=9700, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 19:47:50,971 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 720 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 646 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 646 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:50,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 21 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [646 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:47:50,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-01-31 19:47:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 376. [2022-01-31 19:47:51,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 371 states have (on average 1.0080862533692723) internal successors, (374), 371 states have internal predecessors, (374), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:51,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 378 transitions. [2022-01-31 19:47:51,097 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 378 transitions. Word has length 369 [2022-01-31 19:47:51,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:51,097 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 378 transitions. [2022-01-31 19:47:51,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 2.111111111111111) internal successors, (133), 62 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:51,098 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 378 transitions. [2022-01-31 19:47:51,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-01-31 19:47:51,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:51,099 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:51,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 19:47:51,099 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:51,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:51,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1259286677, now seen corresponding path program 60 times [2022-01-31 19:47:51,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:51,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334331304] [2022-01-31 19:47:51,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:51,101 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:51,101 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:51,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:51,105 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:52,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:52,542 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:52,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334331304] [2022-01-31 19:47:52,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1334331304] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:52,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:52,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 19:47:52,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432021564] [2022-01-31 19:47:52,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:52,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 19:47:52,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:52,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 19:47:52,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1958, Invalid=2202, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 19:47:52,544 INFO L87 Difference]: Start difference. First operand 376 states and 378 transitions. Second operand has 65 states, 64 states have (on average 2.109375) internal successors, (135), 63 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:54,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:54,725 INFO L93 Difference]: Finished difference Result 634 states and 640 transitions. [2022-01-31 19:47:54,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 19:47:54,725 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 2.109375) internal successors, (135), 63 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 375 [2022-01-31 19:47:54,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:54,726 INFO L225 Difference]: With dead ends: 634 [2022-01-31 19:47:54,726 INFO L226 Difference]: Without dead ends: 385 [2022-01-31 19:47:54,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1951 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5988, Invalid=10014, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 19:47:54,728 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 683 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:54,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 29 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:47:54,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-01-31 19:47:54,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 382. [2022-01-31 19:47:54,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 377 states have (on average 1.0079575596816976) internal successors, (380), 377 states have internal predecessors, (380), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 384 transitions. [2022-01-31 19:47:54,853 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 384 transitions. Word has length 375 [2022-01-31 19:47:54,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:54,853 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 384 transitions. [2022-01-31 19:47:54,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 2.109375) internal successors, (135), 63 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:54,854 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 384 transitions. [2022-01-31 19:47:54,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-01-31 19:47:54,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:54,856 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:54,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 19:47:54,856 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:54,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:54,856 INFO L85 PathProgramCache]: Analyzing trace with hash -576000475, now seen corresponding path program 61 times [2022-01-31 19:47:54,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:54,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305177856] [2022-01-31 19:47:54,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:54,858 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:54,859 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:54,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:54,865 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:55,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:56,001 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:56,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305177856] [2022-01-31 19:47:56,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [305177856] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:56,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:56,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 19:47:56,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351761439] [2022-01-31 19:47:56,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:56,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 19:47:56,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:56,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 19:47:56,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 19:47:56,002 INFO L87 Difference]: Start difference. First operand 382 states and 384 transitions. Second operand has 66 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 64 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:57,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:57,946 INFO L93 Difference]: Finished difference Result 644 states and 650 transitions. [2022-01-31 19:47:57,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 19:47:57,946 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 64 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 381 [2022-01-31 19:47:57,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:57,947 INFO L225 Difference]: With dead ends: 644 [2022-01-31 19:47:57,947 INFO L226 Difference]: Without dead ends: 391 [2022-01-31 19:47:57,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6179, Invalid=10333, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 19:47:57,949 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 822 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:57,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 19 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:47:57,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-01-31 19:47:58,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 388. [2022-01-31 19:47:58,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 383 states have (on average 1.0078328981723237) internal successors, (386), 383 states have internal predecessors, (386), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:58,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 390 transitions. [2022-01-31 19:47:58,076 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 390 transitions. Word has length 381 [2022-01-31 19:47:58,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:58,077 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 390 transitions. [2022-01-31 19:47:58,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 64 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:58,077 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 390 transitions. [2022-01-31 19:47:58,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-01-31 19:47:58,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:58,079 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:58,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 19:47:58,079 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:58,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:58,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2145999199, now seen corresponding path program 62 times [2022-01-31 19:47:58,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:58,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514294760] [2022-01-31 19:47:58,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:58,090 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:58,090 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:58,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:58,096 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:59,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:59,329 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:59,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514294760] [2022-01-31 19:47:59,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [514294760] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:59,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:59,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 19:47:59,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766410359] [2022-01-31 19:47:59,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:59,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 19:47:59,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:59,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 19:47:59,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2085, Invalid=2337, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 19:47:59,331 INFO L87 Difference]: Start difference. First operand 388 states and 390 transitions. Second operand has 67 states, 66 states have (on average 2.106060606060606) internal successors, (139), 65 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:01,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:48:01,347 INFO L93 Difference]: Finished difference Result 654 states and 660 transitions. [2022-01-31 19:48:01,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 19:48:01,348 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.106060606060606) internal successors, (139), 65 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 387 [2022-01-31 19:48:01,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:48:01,349 INFO L225 Difference]: With dead ends: 654 [2022-01-31 19:48:01,349 INFO L226 Difference]: Without dead ends: 397 [2022-01-31 19:48:01,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6373, Invalid=10657, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 19:48:01,351 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 817 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 743 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 743 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:48:01,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 21 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [743 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:48:01,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-01-31 19:48:01,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 394. [2022-01-31 19:48:01,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 389 states have (on average 1.0077120822622108) internal successors, (392), 389 states have internal predecessors, (392), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 396 transitions. [2022-01-31 19:48:01,483 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 396 transitions. Word has length 387 [2022-01-31 19:48:01,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:48:01,483 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 396 transitions. [2022-01-31 19:48:01,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.106060606060606) internal successors, (139), 65 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:01,483 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 396 transitions. [2022-01-31 19:48:01,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2022-01-31 19:48:01,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:48:01,485 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:48:01,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 19:48:01,485 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:48:01,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:48:01,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1870180633, now seen corresponding path program 63 times [2022-01-31 19:48:01,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:48:01,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642952312] [2022-01-31 19:48:01,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:48:01,487 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:48:01,487 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:48:01,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:48:01,491 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:48:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:02,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:48:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:02,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:48:02,872 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:48:02,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642952312] [2022-01-31 19:48:02,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1642952312] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:48:02,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:48:02,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 19:48:02,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9799986] [2022-01-31 19:48:02,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:48:02,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 19:48:02,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:48:02,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 19:48:02,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2150, Invalid=2406, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 19:48:02,874 INFO L87 Difference]: Start difference. First operand 394 states and 396 transitions. Second operand has 68 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 66 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:04,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:48:04,901 INFO L93 Difference]: Finished difference Result 664 states and 670 transitions. [2022-01-31 19:48:04,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 19:48:04,902 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 66 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 393 [2022-01-31 19:48:04,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:48:04,903 INFO L225 Difference]: With dead ends: 664 [2022-01-31 19:48:04,903 INFO L226 Difference]: Without dead ends: 403 [2022-01-31 19:48:04,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2143 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6570, Invalid=10986, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 19:48:04,904 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 716 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 637 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:48:04,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [716 Valid, 27 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [637 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:48:04,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-01-31 19:48:05,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 400. [2022-01-31 19:48:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 395 states have (on average 1.0075949367088608) internal successors, (398), 395 states have internal predecessors, (398), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:05,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 402 transitions. [2022-01-31 19:48:05,027 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 402 transitions. Word has length 393 [2022-01-31 19:48:05,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:48:05,027 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 402 transitions. [2022-01-31 19:48:05,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 66 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:05,027 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 402 transitions. [2022-01-31 19:48:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-01-31 19:48:05,028 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:48:05,028 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:48:05,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 19:48:05,029 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:48:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:48:05,029 INFO L85 PathProgramCache]: Analyzing trace with hash -231893677, now seen corresponding path program 64 times [2022-01-31 19:48:05,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:48:05,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274102624] [2022-01-31 19:48:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:48:05,030 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:48:05,030 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:48:05,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:48:05,034 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:48:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:06,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:48:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:48:06,531 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:48:06,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274102624] [2022-01-31 19:48:06,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [274102624] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:48:06,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:48:06,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 19:48:06,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051547438] [2022-01-31 19:48:06,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:48:06,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 19:48:06,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:48:06,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 19:48:06,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2216, Invalid=2476, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 19:48:06,532 INFO L87 Difference]: Start difference. First operand 400 states and 402 transitions. Second operand has 69 states, 68 states have (on average 2.1029411764705883) internal successors, (143), 67 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:08,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:48:08,994 INFO L93 Difference]: Finished difference Result 674 states and 680 transitions. [2022-01-31 19:48:08,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 19:48:08,994 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 2.1029411764705883) internal successors, (143), 67 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 399 [2022-01-31 19:48:08,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:48:08,995 INFO L225 Difference]: With dead ends: 674 [2022-01-31 19:48:08,995 INFO L226 Difference]: Without dead ends: 409 [2022-01-31 19:48:08,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2209 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6770, Invalid=11320, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 19:48:08,997 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 793 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 715 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 715 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:48:08,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 23 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [715 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:48:08,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-01-31 19:48:09,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 406. [2022-01-31 19:48:09,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 401 states have (on average 1.0074812967581048) internal successors, (404), 401 states have internal predecessors, (404), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 408 transitions. [2022-01-31 19:48:09,122 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 408 transitions. Word has length 399 [2022-01-31 19:48:09,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:48:09,123 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 408 transitions. [2022-01-31 19:48:09,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 2.1029411764705883) internal successors, (143), 67 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:09,123 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 408 transitions. [2022-01-31 19:48:09,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2022-01-31 19:48:09,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:48:09,124 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:48:09,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 19:48:09,125 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:48:09,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:48:09,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1713068531, now seen corresponding path program 65 times [2022-01-31 19:48:09,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:48:09,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823883799] [2022-01-31 19:48:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:48:09,126 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:48:09,126 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:48:09,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:48:09,130 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:48:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:10,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:48:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:48:10,413 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:48:10,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823883799] [2022-01-31 19:48:10,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1823883799] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:48:10,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:48:10,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 19:48:10,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643454923] [2022-01-31 19:48:10,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:48:10,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 19:48:10,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:48:10,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 19:48:10,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2283, Invalid=2547, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 19:48:10,415 INFO L87 Difference]: Start difference. First operand 406 states and 408 transitions. Second operand has 70 states, 69 states have (on average 2.101449275362319) internal successors, (145), 68 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:12,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:48:12,919 INFO L93 Difference]: Finished difference Result 684 states and 690 transitions. [2022-01-31 19:48:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 19:48:12,919 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 2.101449275362319) internal successors, (145), 68 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 405 [2022-01-31 19:48:12,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:48:12,920 INFO L225 Difference]: With dead ends: 684 [2022-01-31 19:48:12,920 INFO L226 Difference]: Without dead ends: 415 [2022-01-31 19:48:12,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2276 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6973, Invalid=11659, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 19:48:12,922 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 746 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 667 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 667 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:48:12,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 29 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [667 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:48:12,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-01-31 19:48:13,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 412. [2022-01-31 19:48:13,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 407 states have (on average 1.0073710073710074) internal successors, (410), 407 states have internal predecessors, (410), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:13,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 414 transitions. [2022-01-31 19:48:13,085 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 414 transitions. Word has length 405 [2022-01-31 19:48:13,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:48:13,085 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 414 transitions. [2022-01-31 19:48:13,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 2.101449275362319) internal successors, (145), 68 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:13,085 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 414 transitions. [2022-01-31 19:48:13,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-01-31 19:48:13,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:48:13,087 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:48:13,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 19:48:13,087 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:48:13,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:48:13,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1635613881, now seen corresponding path program 66 times [2022-01-31 19:48:13,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:48:13,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130422915] [2022-01-31 19:48:13,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:48:13,089 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:48:13,089 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:48:13,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:48:13,093 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:48:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:14,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:48:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:14,604 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 19:48:14,604 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:48:14,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130422915] [2022-01-31 19:48:14,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2130422915] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:48:14,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:48:14,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 19:48:14,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782676543] [2022-01-31 19:48:14,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:48:14,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 19:48:14,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:48:14,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 19:48:14,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=2619, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 19:48:14,611 INFO L87 Difference]: Start difference. First operand 412 states and 414 transitions. Second operand has 71 states, 70 states have (on average 2.1) internal successors, (147), 69 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:17,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:48:17,198 INFO L93 Difference]: Finished difference Result 694 states and 700 transitions. [2022-01-31 19:48:17,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 19:48:17,198 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 2.1) internal successors, (147), 69 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 411 [2022-01-31 19:48:17,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:48:17,199 INFO L225 Difference]: With dead ends: 694 [2022-01-31 19:48:17,199 INFO L226 Difference]: Without dead ends: 421 [2022-01-31 19:48:17,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7179, Invalid=12003, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 19:48:17,200 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 743 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:48:17,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 31 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:48:17,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-01-31 19:48:17,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 418. [2022-01-31 19:48:17,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 413 states have (on average 1.0072639225181599) internal successors, (416), 413 states have internal predecessors, (416), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:17,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 420 transitions. [2022-01-31 19:48:17,334 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 420 transitions. Word has length 411 [2022-01-31 19:48:17,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:48:17,334 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 420 transitions. [2022-01-31 19:48:17,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 2.1) internal successors, (147), 69 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:17,334 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 420 transitions. [2022-01-31 19:48:17,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-01-31 19:48:17,335 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:48:17,336 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:48:17,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 19:48:17,336 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:48:17,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:48:17,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1208759039, now seen corresponding path program 67 times [2022-01-31 19:48:17,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:48:17,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118153991] [2022-01-31 19:48:17,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:48:17,337 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:48:17,337 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:48:17,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:48:17,342 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:48:17,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:18,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:48:18,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:48:18,642 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:48:18,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118153991] [2022-01-31 19:48:18,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1118153991] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:48:18,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:48:18,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 19:48:18,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961039987] [2022-01-31 19:48:18,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:48:18,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 19:48:18,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:48:18,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 19:48:18,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2420, Invalid=2692, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 19:48:18,643 INFO L87 Difference]: Start difference. First operand 418 states and 420 transitions. Second operand has 72 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 70 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:21,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:48:21,167 INFO L93 Difference]: Finished difference Result 704 states and 710 transitions. [2022-01-31 19:48:21,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 19:48:21,167 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 70 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 417 [2022-01-31 19:48:21,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:48:21,168 INFO L225 Difference]: With dead ends: 704 [2022-01-31 19:48:21,168 INFO L226 Difference]: Without dead ends: 427 [2022-01-31 19:48:21,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2413 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7388, Invalid=12352, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 19:48:21,170 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 896 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 816 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:48:21,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 25 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [816 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:48:21,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-01-31 19:48:21,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 424. [2022-01-31 19:48:21,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 419 states have (on average 1.0071599045346062) internal successors, (422), 419 states have internal predecessors, (422), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 426 transitions. [2022-01-31 19:48:21,329 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 426 transitions. Word has length 417 [2022-01-31 19:48:21,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:48:21,329 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 426 transitions. [2022-01-31 19:48:21,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 70 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:21,329 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 426 transitions. [2022-01-31 19:48:21,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2022-01-31 19:48:21,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:48:21,331 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:48:21,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 19:48:21,331 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:48:21,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:48:21,331 INFO L85 PathProgramCache]: Analyzing trace with hash 2016224059, now seen corresponding path program 68 times [2022-01-31 19:48:21,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:48:21,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511703573] [2022-01-31 19:48:21,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:48:21,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:48:21,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:48:21,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:48:21,338 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:48:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:22,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:48:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:48:22,677 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:48:22,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511703573] [2022-01-31 19:48:22,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1511703573] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:48:22,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:48:22,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 19:48:22,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718457152] [2022-01-31 19:48:22,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:48:22,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 19:48:22,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:48:22,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 19:48:22,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2490, Invalid=2766, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 19:48:22,679 INFO L87 Difference]: Start difference. First operand 424 states and 426 transitions. Second operand has 73 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 71 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:24,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:48:24,973 INFO L93 Difference]: Finished difference Result 714 states and 720 transitions. [2022-01-31 19:48:24,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 19:48:24,973 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 71 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 423 [2022-01-31 19:48:24,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:48:24,975 INFO L225 Difference]: With dead ends: 714 [2022-01-31 19:48:24,975 INFO L226 Difference]: Without dead ends: 433 [2022-01-31 19:48:24,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7600, Invalid=12706, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 19:48:24,976 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 837 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 755 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:48:24,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [837 Valid, 23 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [755 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:48:24,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-01-31 19:48:25,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 430. [2022-01-31 19:48:25,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 425 states have (on average 1.0070588235294118) internal successors, (428), 425 states have internal predecessors, (428), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:25,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 432 transitions. [2022-01-31 19:48:25,118 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 432 transitions. Word has length 423 [2022-01-31 19:48:25,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:48:25,118 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 432 transitions. [2022-01-31 19:48:25,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 71 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 432 transitions. [2022-01-31 19:48:25,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2022-01-31 19:48:25,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:48:25,120 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:48:25,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 19:48:25,120 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:48:25,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:48:25,120 INFO L85 PathProgramCache]: Analyzing trace with hash 623584757, now seen corresponding path program 69 times [2022-01-31 19:48:25,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:48:25,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728752041] [2022-01-31 19:48:25,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:48:25,122 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:48:25,122 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:48:25,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:48:25,127 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:48:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:26,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:48:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:48:26,910 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:48:26,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728752041] [2022-01-31 19:48:26,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1728752041] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:48:26,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:48:26,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 19:48:26,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098577988] [2022-01-31 19:48:26,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:48:26,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 19:48:26,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:48:26,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 19:48:26,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2561, Invalid=2841, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 19:48:26,912 INFO L87 Difference]: Start difference. First operand 430 states and 432 transitions. Second operand has 74 states, 73 states have (on average 2.095890410958904) internal successors, (153), 72 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:29,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:48:29,347 INFO L93 Difference]: Finished difference Result 724 states and 730 transitions. [2022-01-31 19:48:29,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 19:48:29,347 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 2.095890410958904) internal successors, (153), 72 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 429 [2022-01-31 19:48:29,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:48:29,349 INFO L225 Difference]: With dead ends: 724 [2022-01-31 19:48:29,349 INFO L226 Difference]: Without dead ends: 439 [2022-01-31 19:48:29,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2554 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7815, Invalid=13065, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 19:48:29,351 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 928 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 845 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 845 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:48:29,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [928 Valid, 29 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [845 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:48:29,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-01-31 19:48:29,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 436. [2022-01-31 19:48:29,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 431 states have (on average 1.0069605568445477) internal successors, (434), 431 states have internal predecessors, (434), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:29,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 438 transitions. [2022-01-31 19:48:29,505 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 438 transitions. Word has length 429 [2022-01-31 19:48:29,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:48:29,506 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 438 transitions. [2022-01-31 19:48:29,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 2.095890410958904) internal successors, (153), 72 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:29,506 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 438 transitions. [2022-01-31 19:48:29,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-01-31 19:48:29,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:48:29,508 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:48:29,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 19:48:29,508 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:48:29,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:48:29,508 INFO L85 PathProgramCache]: Analyzing trace with hash 317879599, now seen corresponding path program 70 times [2022-01-31 19:48:29,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:48:29,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929611832] [2022-01-31 19:48:29,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:48:29,509 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:48:29,509 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:48:29,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:48:29,514 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:48:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:30,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:48:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:30,696 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 19:48:30,696 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:48:30,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929611832] [2022-01-31 19:48:30,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1929611832] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:48:30,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:48:30,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 19:48:30,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374763659] [2022-01-31 19:48:30,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:48:30,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 19:48:30,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:48:30,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 19:48:30,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2633, Invalid=2917, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 19:48:30,699 INFO L87 Difference]: Start difference. First operand 436 states and 438 transitions. Second operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 73 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:33,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:48:33,149 INFO L93 Difference]: Finished difference Result 734 states and 740 transitions. [2022-01-31 19:48:33,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 19:48:33,150 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 73 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 435 [2022-01-31 19:48:33,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:48:33,151 INFO L225 Difference]: With dead ends: 734 [2022-01-31 19:48:33,151 INFO L226 Difference]: Without dead ends: 445 [2022-01-31 19:48:33,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2626 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=8033, Invalid=13429, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 19:48:33,152 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 961 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 879 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 879 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:48:33,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [961 Valid, 27 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [879 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:48:33,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-01-31 19:48:33,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 442. [2022-01-31 19:48:33,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 437 states have (on average 1.0068649885583525) internal successors, (440), 437 states have internal predecessors, (440), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:33,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 444 transitions. [2022-01-31 19:48:33,312 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 444 transitions. Word has length 435 [2022-01-31 19:48:33,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:48:33,312 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 444 transitions. [2022-01-31 19:48:33,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 73 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:33,312 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 444 transitions. [2022-01-31 19:48:33,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-01-31 19:48:33,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:48:33,314 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:48:33,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 19:48:33,314 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:48:33,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:48:33,314 INFO L85 PathProgramCache]: Analyzing trace with hash 2106568937, now seen corresponding path program 71 times [2022-01-31 19:48:33,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:48:33,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973375223] [2022-01-31 19:48:33,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:48:33,315 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:48:33,316 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:48:33,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:48:33,321 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:48:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:34,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:48:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:48:34,800 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:48:34,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973375223] [2022-01-31 19:48:34,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1973375223] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:48:34,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:48:34,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 19:48:34,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766412939] [2022-01-31 19:48:34,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:48:34,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 19:48:34,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:48:34,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 19:48:34,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2706, Invalid=2994, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 19:48:34,803 INFO L87 Difference]: Start difference. First operand 442 states and 444 transitions. Second operand has 76 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 74 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:37,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:48:37,871 INFO L93 Difference]: Finished difference Result 744 states and 750 transitions. [2022-01-31 19:48:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 19:48:37,871 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 74 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 441 [2022-01-31 19:48:37,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:48:37,872 INFO L225 Difference]: With dead ends: 744 [2022-01-31 19:48:37,872 INFO L226 Difference]: Without dead ends: 451 [2022-01-31 19:48:37,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8254, Invalid=13798, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 19:48:37,874 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 946 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:48:37,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [946 Valid, 19 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:48:37,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-01-31 19:48:38,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 448. [2022-01-31 19:48:38,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 443 states have (on average 1.0067720090293453) internal successors, (446), 443 states have internal predecessors, (446), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:38,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 450 transitions. [2022-01-31 19:48:38,029 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 450 transitions. Word has length 441 [2022-01-31 19:48:38,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:48:38,029 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 450 transitions. [2022-01-31 19:48:38,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 74 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:38,029 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 450 transitions. [2022-01-31 19:48:38,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-01-31 19:48:38,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:48:38,031 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:48:38,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 19:48:38,031 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:48:38,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:48:38,031 INFO L85 PathProgramCache]: Analyzing trace with hash -485000925, now seen corresponding path program 72 times [2022-01-31 19:48:38,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:48:38,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976772023] [2022-01-31 19:48:38,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:48:38,032 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:48:38,033 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:48:38,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:48:38,044 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:48:38,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:39,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:48:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:48:39,331 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:48:39,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976772023] [2022-01-31 19:48:39,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1976772023] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:48:39,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:48:39,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 19:48:39,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696631229] [2022-01-31 19:48:39,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:48:39,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 19:48:39,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:48:39,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 19:48:39,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2780, Invalid=3072, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 19:48:39,333 INFO L87 Difference]: Start difference. First operand 448 states and 450 transitions. Second operand has 77 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 75 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:41,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:48:41,855 INFO L93 Difference]: Finished difference Result 754 states and 760 transitions. [2022-01-31 19:48:41,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 19:48:41,856 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 75 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 447 [2022-01-31 19:48:41,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:48:41,857 INFO L225 Difference]: With dead ends: 754 [2022-01-31 19:48:41,857 INFO L226 Difference]: Without dead ends: 457 [2022-01-31 19:48:41,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2773 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=8478, Invalid=14172, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 19:48:41,858 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 979 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 896 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 896 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:48:41,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [979 Valid, 21 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [896 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:48:41,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-01-31 19:48:42,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 454. [2022-01-31 19:48:42,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 449 states have (on average 1.0066815144766148) internal successors, (452), 449 states have internal predecessors, (452), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:42,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 456 transitions. [2022-01-31 19:48:42,017 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 456 transitions. Word has length 447 [2022-01-31 19:48:42,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:48:42,018 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 456 transitions. [2022-01-31 19:48:42,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 75 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:42,018 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 456 transitions. [2022-01-31 19:48:42,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2022-01-31 19:48:42,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:48:42,019 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:48:42,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 19:48:42,020 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:48:42,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:48:42,020 INFO L85 PathProgramCache]: Analyzing trace with hash -576295459, now seen corresponding path program 73 times [2022-01-31 19:48:42,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:48:42,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395682607] [2022-01-31 19:48:42,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:48:42,021 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:48:42,021 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:48:42,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:48:42,027 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:48:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:43,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:48:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:48:43,615 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:48:43,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395682607] [2022-01-31 19:48:43,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [395682607] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:48:43,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:48:43,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 19:48:43,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604036706] [2022-01-31 19:48:43,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:48:43,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 19:48:43,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:48:43,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 19:48:43,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2855, Invalid=3151, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 19:48:43,633 INFO L87 Difference]: Start difference. First operand 454 states and 456 transitions. Second operand has 78 states, 77 states have (on average 2.090909090909091) internal successors, (161), 76 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:46,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:48:46,428 INFO L93 Difference]: Finished difference Result 764 states and 770 transitions. [2022-01-31 19:48:46,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 19:48:46,429 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 2.090909090909091) internal successors, (161), 76 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 453 [2022-01-31 19:48:46,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:48:46,430 INFO L225 Difference]: With dead ends: 764 [2022-01-31 19:48:46,430 INFO L226 Difference]: Without dead ends: 463 [2022-01-31 19:48:46,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=8705, Invalid=14551, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 19:48:46,431 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1332 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 1250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1332 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1250 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:48:46,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1332 Valid, 21 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1250 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:48:46,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-31 19:48:46,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 460. [2022-01-31 19:48:46,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 455 states have (on average 1.0065934065934066) internal successors, (458), 455 states have internal predecessors, (458), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:46,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 462 transitions. [2022-01-31 19:48:46,593 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 462 transitions. Word has length 453 [2022-01-31 19:48:46,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:48:46,594 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 462 transitions. [2022-01-31 19:48:46,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 2.090909090909091) internal successors, (161), 76 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:46,594 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 462 transitions. [2022-01-31 19:48:46,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2022-01-31 19:48:46,595 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:48:46,596 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:48:46,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 19:48:46,596 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:48:46,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:48:46,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2103521047, now seen corresponding path program 74 times [2022-01-31 19:48:46,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:48:46,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988212940] [2022-01-31 19:48:46,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:48:46,598 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:48:46,598 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:48:46,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:48:46,603 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:48:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:48,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:48:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:48:48,533 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:48:48,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988212940] [2022-01-31 19:48:48,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [988212940] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:48:48,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:48:48,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 19:48:48,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066112159] [2022-01-31 19:48:48,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:48:48,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 19:48:48,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:48:48,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 19:48:48,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2931, Invalid=3231, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:48:48,535 INFO L87 Difference]: Start difference. First operand 460 states and 462 transitions. Second operand has 79 states, 78 states have (on average 2.08974358974359) internal successors, (163), 77 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:51,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:48:51,606 INFO L93 Difference]: Finished difference Result 774 states and 780 transitions. [2022-01-31 19:48:51,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 19:48:51,607 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 2.08974358974359) internal successors, (163), 77 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 459 [2022-01-31 19:48:51,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:48:51,608 INFO L225 Difference]: With dead ends: 774 [2022-01-31 19:48:51,608 INFO L226 Difference]: Without dead ends: 469 [2022-01-31 19:48:51,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2924 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=8935, Invalid=14935, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 19:48:51,609 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 893 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 803 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 803 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:48:51,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 25 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [803 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:48:51,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-31 19:48:51,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 466. [2022-01-31 19:48:51,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 461 states have (on average 1.0065075921908895) internal successors, (464), 461 states have internal predecessors, (464), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 468 transitions. [2022-01-31 19:48:51,779 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 468 transitions. Word has length 459 [2022-01-31 19:48:51,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:48:51,779 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 468 transitions. [2022-01-31 19:48:51,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 2.08974358974359) internal successors, (163), 77 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:51,780 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 468 transitions. [2022-01-31 19:48:51,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2022-01-31 19:48:51,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:48:51,789 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:48:51,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 19:48:51,789 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:48:51,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:48:51,790 INFO L85 PathProgramCache]: Analyzing trace with hash 578051281, now seen corresponding path program 75 times [2022-01-31 19:48:51,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:48:51,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029752961] [2022-01-31 19:48:51,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:48:51,793 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:48:51,793 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:48:51,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:48:51,798 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:48:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:53,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:48:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:48:53,836 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:48:53,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029752961] [2022-01-31 19:48:53,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2029752961] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:48:53,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:48:53,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 19:48:53,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687181411] [2022-01-31 19:48:53,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:48:53,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 19:48:53,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:48:53,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 19:48:53,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3008, Invalid=3312, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 19:48:53,838 INFO L87 Difference]: Start difference. First operand 466 states and 468 transitions. Second operand has 80 states, 79 states have (on average 2.088607594936709) internal successors, (165), 78 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:56,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:48:56,647 INFO L93 Difference]: Finished difference Result 784 states and 790 transitions. [2022-01-31 19:48:56,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 19:48:56,649 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 2.088607594936709) internal successors, (165), 78 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 465 [2022-01-31 19:48:56,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:48:56,650 INFO L225 Difference]: With dead ends: 784 [2022-01-31 19:48:56,650 INFO L226 Difference]: Without dead ends: 475 [2022-01-31 19:48:56,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3001 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9168, Invalid=15324, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 19:48:56,651 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 962 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:48:56,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [962 Valid, 25 Invalid, 1403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [875 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:48:56,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-01-31 19:48:56,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 472. [2022-01-31 19:48:56,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 467 states have (on average 1.006423982869379) internal successors, (470), 467 states have internal predecessors, (470), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:56,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 474 transitions. [2022-01-31 19:48:56,833 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 474 transitions. Word has length 465 [2022-01-31 19:48:56,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:48:56,833 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 474 transitions. [2022-01-31 19:48:56,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 2.088607594936709) internal successors, (165), 78 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:56,833 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 474 transitions. [2022-01-31 19:48:56,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2022-01-31 19:48:56,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:48:56,835 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:48:56,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 19:48:56,835 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:48:56,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:48:56,835 INFO L85 PathProgramCache]: Analyzing trace with hash -686516469, now seen corresponding path program 76 times [2022-01-31 19:48:56,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:48:56,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367640227] [2022-01-31 19:48:56,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:48:56,837 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:48:56,837 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:48:56,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:48:56,842 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:48:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:58,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:48:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:48:58,786 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:48:58,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367640227] [2022-01-31 19:48:58,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1367640227] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:48:58,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:48:58,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 19:48:58,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137842742] [2022-01-31 19:48:58,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:48:58,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 19:48:58,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:48:58,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 19:48:58,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3086, Invalid=3394, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 19:48:58,789 INFO L87 Difference]: Start difference. First operand 472 states and 474 transitions. Second operand has 81 states, 80 states have (on average 2.0875) internal successors, (167), 79 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:01,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:49:01,642 INFO L93 Difference]: Finished difference Result 794 states and 800 transitions. [2022-01-31 19:49:01,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 19:49:01,642 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 2.0875) internal successors, (167), 79 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 471 [2022-01-31 19:49:01,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:49:01,643 INFO L225 Difference]: With dead ends: 794 [2022-01-31 19:49:01,643 INFO L226 Difference]: Without dead ends: 481 [2022-01-31 19:49:01,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3079 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=9404, Invalid=15718, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 19:49:01,645 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 949 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 860 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 860 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:49:01,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [949 Valid, 23 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [860 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:49:01,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-01-31 19:49:01,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 478. [2022-01-31 19:49:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 473 states have (on average 1.0063424947145878) internal successors, (476), 473 states have internal predecessors, (476), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 480 transitions. [2022-01-31 19:49:01,822 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 480 transitions. Word has length 471 [2022-01-31 19:49:01,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:49:01,822 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 480 transitions. [2022-01-31 19:49:01,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 2.0875) internal successors, (167), 79 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:01,822 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 480 transitions. [2022-01-31 19:49:01,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2022-01-31 19:49:01,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:49:01,824 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:49:01,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 19:49:01,824 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:49:01,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:49:01,825 INFO L85 PathProgramCache]: Analyzing trace with hash 696155589, now seen corresponding path program 77 times [2022-01-31 19:49:01,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:49:01,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206752180] [2022-01-31 19:49:01,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:49:01,826 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:49:01,826 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:49:01,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:49:01,832 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:49:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:04,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:49:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:49:04,049 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:49:04,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206752180] [2022-01-31 19:49:04,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1206752180] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:49:04,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:49:04,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 19:49:04,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038488130] [2022-01-31 19:49:04,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:49:04,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 19:49:04,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:49:04,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 19:49:04,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3165, Invalid=3477, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 19:49:04,051 INFO L87 Difference]: Start difference. First operand 478 states and 480 transitions. Second operand has 82 states, 81 states have (on average 2.0864197530864197) internal successors, (169), 80 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:06,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:49:06,912 INFO L93 Difference]: Finished difference Result 804 states and 810 transitions. [2022-01-31 19:49:06,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 19:49:06,913 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 2.0864197530864197) internal successors, (169), 80 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 477 [2022-01-31 19:49:06,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:49:06,914 INFO L225 Difference]: With dead ends: 804 [2022-01-31 19:49:06,914 INFO L226 Difference]: Without dead ends: 487 [2022-01-31 19:49:06,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3158 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9643, Invalid=16117, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 19:49:06,916 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 966 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 876 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 876 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:49:06,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [966 Valid, 23 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [876 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:49:06,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-01-31 19:49:07,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 484. [2022-01-31 19:49:07,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 479 states have (on average 1.0062630480167014) internal successors, (482), 479 states have internal predecessors, (482), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:07,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 486 transitions. [2022-01-31 19:49:07,106 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 486 transitions. Word has length 477 [2022-01-31 19:49:07,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:49:07,106 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 486 transitions. [2022-01-31 19:49:07,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 2.0864197530864197) internal successors, (169), 80 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:07,106 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 486 transitions. [2022-01-31 19:49:07,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-01-31 19:49:07,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:49:07,108 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:49:07,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 19:49:07,108 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:49:07,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:49:07,109 INFO L85 PathProgramCache]: Analyzing trace with hash -2047430401, now seen corresponding path program 78 times [2022-01-31 19:49:07,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:49:07,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378024519] [2022-01-31 19:49:07,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:49:07,110 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:49:07,110 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:49:07,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:49:07,117 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:49:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:09,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:49:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:49:09,102 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:49:09,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378024519] [2022-01-31 19:49:09,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [378024519] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:49:09,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:49:09,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 19:49:09,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675212415] [2022-01-31 19:49:09,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:49:09,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 19:49:09,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:49:09,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 19:49:09,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3245, Invalid=3561, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 19:49:09,104 INFO L87 Difference]: Start difference. First operand 484 states and 486 transitions. Second operand has 83 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 81 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:12,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:49:12,693 INFO L93 Difference]: Finished difference Result 814 states and 820 transitions. [2022-01-31 19:49:12,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 19:49:12,694 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 81 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 483 [2022-01-31 19:49:12,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:49:12,695 INFO L225 Difference]: With dead ends: 814 [2022-01-31 19:49:12,695 INFO L226 Difference]: Without dead ends: 493 [2022-01-31 19:49:12,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3238 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=9885, Invalid=16521, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 19:49:12,697 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1127 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 1035 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1127 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1035 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:49:12,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1127 Valid, 21 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1035 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:49:12,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-31 19:49:12,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 490. [2022-01-31 19:49:12,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 485 states have (on average 1.0061855670103093) internal successors, (488), 485 states have internal predecessors, (488), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:12,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 492 transitions. [2022-01-31 19:49:12,898 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 492 transitions. Word has length 483 [2022-01-31 19:49:12,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:49:12,898 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 492 transitions. [2022-01-31 19:49:12,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 81 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:12,898 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 492 transitions. [2022-01-31 19:49:12,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2022-01-31 19:49:12,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:49:12,901 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:49:12,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 19:49:12,901 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:49:12,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:49:12,906 INFO L85 PathProgramCache]: Analyzing trace with hash 281661625, now seen corresponding path program 79 times [2022-01-31 19:49:12,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:49:12,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139901235] [2022-01-31 19:49:12,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:49:12,907 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:49:12,907 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:49:12,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:49:12,918 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:49:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:15,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:49:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:15,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:49:15,080 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:49:15,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139901235] [2022-01-31 19:49:15,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [139901235] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:49:15,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:49:15,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 19:49:15,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882862875] [2022-01-31 19:49:15,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:49:15,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 19:49:15,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:49:15,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 19:49:15,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3326, Invalid=3646, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 19:49:15,082 INFO L87 Difference]: Start difference. First operand 490 states and 492 transitions. Second operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 82 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:18,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:49:18,196 INFO L93 Difference]: Finished difference Result 824 states and 830 transitions. [2022-01-31 19:49:18,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 19:49:18,196 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 82 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 489 [2022-01-31 19:49:18,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:49:18,197 INFO L225 Difference]: With dead ends: 824 [2022-01-31 19:49:18,197 INFO L226 Difference]: Without dead ends: 499 [2022-01-31 19:49:18,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3319 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10130, Invalid=16930, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 19:49:18,199 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 924 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 829 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 829 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:49:18,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 27 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [829 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:49:18,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-31 19:49:18,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 496. [2022-01-31 19:49:18,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 491 states have (on average 1.0061099796334012) internal successors, (494), 491 states have internal predecessors, (494), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:18,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 498 transitions. [2022-01-31 19:49:18,398 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 498 transitions. Word has length 489 [2022-01-31 19:49:18,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:49:18,399 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 498 transitions. [2022-01-31 19:49:18,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 82 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:18,399 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 498 transitions. [2022-01-31 19:49:18,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2022-01-31 19:49:18,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:49:18,401 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:49:18,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 19:49:18,401 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:49:18,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:49:18,401 INFO L85 PathProgramCache]: Analyzing trace with hash 5012723, now seen corresponding path program 80 times [2022-01-31 19:49:18,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:49:18,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085797724] [2022-01-31 19:49:18,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:49:18,403 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:49:18,403 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:49:18,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:49:18,409 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:49:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:19,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:49:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:49:19,897 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:49:19,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085797724] [2022-01-31 19:49:19,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1085797724] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:49:19,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:49:19,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 19:49:19,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442671988] [2022-01-31 19:49:19,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:49:19,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 19:49:19,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:49:19,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 19:49:19,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3408, Invalid=3732, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 19:49:19,899 INFO L87 Difference]: Start difference. First operand 496 states and 498 transitions. Second operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 83 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:23,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:49:23,018 INFO L93 Difference]: Finished difference Result 834 states and 840 transitions. [2022-01-31 19:49:23,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 19:49:23,018 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 83 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 495 [2022-01-31 19:49:23,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:49:23,019 INFO L225 Difference]: With dead ends: 834 [2022-01-31 19:49:23,019 INFO L226 Difference]: Without dead ends: 505 [2022-01-31 19:49:23,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3401 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=10378, Invalid=17344, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 19:49:23,021 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1071 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 976 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 976 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:49:23,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 23 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [976 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:49:23,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-01-31 19:49:23,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 502. [2022-01-31 19:49:23,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 497 states have (on average 1.0060362173038229) internal successors, (500), 497 states have internal predecessors, (500), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:23,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 504 transitions. [2022-01-31 19:49:23,218 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 504 transitions. Word has length 495 [2022-01-31 19:49:23,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:49:23,219 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 504 transitions. [2022-01-31 19:49:23,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 83 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:23,219 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 504 transitions. [2022-01-31 19:49:23,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2022-01-31 19:49:23,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:49:23,221 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:49:23,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 19:49:23,221 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:49:23,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:49:23,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1994085805, now seen corresponding path program 81 times [2022-01-31 19:49:23,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:49:23,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136578134] [2022-01-31 19:49:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:49:23,224 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:49:23,224 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:49:23,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:49:23,231 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:49:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:25,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:49:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:25,322 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 19:49:25,323 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:49:25,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136578134] [2022-01-31 19:49:25,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [136578134] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:49:25,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:49:25,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 19:49:25,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630458753] [2022-01-31 19:49:25,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:49:25,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 19:49:25,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:49:25,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 19:49:25,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3491, Invalid=3819, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 19:49:25,325 INFO L87 Difference]: Start difference. First operand 502 states and 504 transitions. Second operand has 86 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 84 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:29,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:49:29,243 INFO L93 Difference]: Finished difference Result 844 states and 850 transitions. [2022-01-31 19:49:29,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 19:49:29,243 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 84 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 501 [2022-01-31 19:49:29,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:49:29,245 INFO L225 Difference]: With dead ends: 844 [2022-01-31 19:49:29,245 INFO L226 Difference]: Without dead ends: 511 [2022-01-31 19:49:29,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3484 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=10629, Invalid=17763, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 19:49:29,246 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1056 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 960 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 960 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:49:29,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1056 Valid, 23 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [960 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:49:29,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-31 19:49:29,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 508. [2022-01-31 19:49:29,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 503 states have (on average 1.0059642147117296) internal successors, (506), 503 states have internal predecessors, (506), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:29,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 510 transitions. [2022-01-31 19:49:29,453 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 510 transitions. Word has length 501 [2022-01-31 19:49:29,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:49:29,453 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 510 transitions. [2022-01-31 19:49:29,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 84 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:29,454 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 510 transitions. [2022-01-31 19:49:29,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2022-01-31 19:49:29,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:49:29,456 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:49:29,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 19:49:29,456 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:49:29,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:49:29,456 INFO L85 PathProgramCache]: Analyzing trace with hash -589628697, now seen corresponding path program 82 times [2022-01-31 19:49:29,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:49:29,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326545928] [2022-01-31 19:49:29,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:49:29,457 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:49:29,457 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:49:29,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:49:29,464 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:49:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:31,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:49:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:49:31,430 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:49:31,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326545928] [2022-01-31 19:49:31,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1326545928] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:49:31,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:49:31,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 19:49:31,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336209581] [2022-01-31 19:49:31,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:49:31,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 19:49:31,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:49:31,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 19:49:31,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3575, Invalid=3907, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 19:49:31,433 INFO L87 Difference]: Start difference. First operand 508 states and 510 transitions. Second operand has 87 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 85 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:35,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:49:35,303 INFO L93 Difference]: Finished difference Result 854 states and 860 transitions. [2022-01-31 19:49:35,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 19:49:35,303 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 85 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 507 [2022-01-31 19:49:35,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:49:35,304 INFO L225 Difference]: With dead ends: 854 [2022-01-31 19:49:35,304 INFO L226 Difference]: Without dead ends: 517 [2022-01-31 19:49:35,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3568 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10883, Invalid=18187, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 19:49:35,306 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1149 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 1053 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1053 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:49:35,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 23 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1053 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:49:35,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-31 19:49:35,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 514. [2022-01-31 19:49:35,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 509 states have (on average 1.005893909626719) internal successors, (512), 509 states have internal predecessors, (512), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:35,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 516 transitions. [2022-01-31 19:49:35,519 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 516 transitions. Word has length 507 [2022-01-31 19:49:35,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:49:35,520 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 516 transitions. [2022-01-31 19:49:35,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 85 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:35,520 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 516 transitions. [2022-01-31 19:49:35,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2022-01-31 19:49:35,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:49:35,522 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:49:35,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 19:49:35,522 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:49:35,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:49:35,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1162343263, now seen corresponding path program 83 times [2022-01-31 19:49:35,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:49:35,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694217219] [2022-01-31 19:49:35,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:49:35,524 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:49:35,524 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:49:35,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:49:35,531 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:49:35,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:37,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:49:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:49:37,190 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:49:37,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694217219] [2022-01-31 19:49:37,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [694217219] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:49:37,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:49:37,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 19:49:37,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606893586] [2022-01-31 19:49:37,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:49:37,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 19:49:37,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:49:37,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 19:49:37,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3660, Invalid=3996, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 19:49:37,192 INFO L87 Difference]: Start difference. First operand 514 states and 516 transitions. Second operand has 88 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 86 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:40,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:49:40,738 INFO L93 Difference]: Finished difference Result 864 states and 870 transitions. [2022-01-31 19:49:40,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 19:49:40,739 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 86 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 513 [2022-01-31 19:49:40,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:49:40,740 INFO L225 Difference]: With dead ends: 864 [2022-01-31 19:49:40,740 INFO L226 Difference]: Without dead ends: 523 [2022-01-31 19:49:40,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3653 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=11140, Invalid=18616, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 19:49:40,742 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1154 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 1057 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1057 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:49:40,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1154 Valid, 17 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1057 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:49:40,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-01-31 19:49:40,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 520. [2022-01-31 19:49:40,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 515 states have (on average 1.0058252427184466) internal successors, (518), 515 states have internal predecessors, (518), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 522 transitions. [2022-01-31 19:49:40,972 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 522 transitions. Word has length 513 [2022-01-31 19:49:40,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:49:40,972 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 522 transitions. [2022-01-31 19:49:40,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 86 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:40,973 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 522 transitions. [2022-01-31 19:49:40,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-01-31 19:49:40,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:49:40,976 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:49:40,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 19:49:40,976 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:49:40,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:49:40,976 INFO L85 PathProgramCache]: Analyzing trace with hash 317139675, now seen corresponding path program 84 times [2022-01-31 19:49:40,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:49:40,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145473907] [2022-01-31 19:49:40,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:49:40,978 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:49:40,978 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:49:40,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:49:40,991 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:49:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:43,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:49:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:49:43,307 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:49:43,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145473907] [2022-01-31 19:49:43,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1145473907] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:49:43,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:49:43,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 19:49:43,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222803416] [2022-01-31 19:49:43,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:49:43,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 19:49:43,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:49:43,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 19:49:43,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3746, Invalid=4086, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 19:49:43,310 INFO L87 Difference]: Start difference. First operand 520 states and 522 transitions. Second operand has 89 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 87 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:46,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:49:46,986 INFO L93 Difference]: Finished difference Result 874 states and 880 transitions. [2022-01-31 19:49:46,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 19:49:46,986 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 87 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 519 [2022-01-31 19:49:46,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:49:46,987 INFO L225 Difference]: With dead ends: 874 [2022-01-31 19:49:46,987 INFO L226 Difference]: Without dead ends: 529 [2022-01-31 19:49:46,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3739 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11400, Invalid=19050, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 19:49:46,989 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1071 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:49:46,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 33 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [975 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:49:46,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-01-31 19:49:47,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 526. [2022-01-31 19:49:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 521 states have (on average 1.0057581573896353) internal successors, (524), 521 states have internal predecessors, (524), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 528 transitions. [2022-01-31 19:49:47,213 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 528 transitions. Word has length 519 [2022-01-31 19:49:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:49:47,214 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 528 transitions. [2022-01-31 19:49:47,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 87 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:47,214 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 528 transitions. [2022-01-31 19:49:47,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2022-01-31 19:49:47,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:49:47,216 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:49:47,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 19:49:47,216 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:49:47,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:49:47,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1004860821, now seen corresponding path program 85 times [2022-01-31 19:49:47,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:49:47,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261365555] [2022-01-31 19:49:47,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:49:47,218 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:49:47,218 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:49:47,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:49:47,225 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:49:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:49,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:49:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:49:49,122 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:49:49,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261365555] [2022-01-31 19:49:49,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1261365555] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:49:49,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:49:49,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 19:49:49,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914456250] [2022-01-31 19:49:49,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:49:49,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 19:49:49,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:49:49,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 19:49:49,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3833, Invalid=4177, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 19:49:49,124 INFO L87 Difference]: Start difference. First operand 526 states and 528 transitions. Second operand has 90 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 88 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:52,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:49:52,958 INFO L93 Difference]: Finished difference Result 884 states and 890 transitions. [2022-01-31 19:49:52,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 19:49:52,958 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 88 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 525 [2022-01-31 19:49:52,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:49:52,960 INFO L225 Difference]: With dead ends: 884 [2022-01-31 19:49:52,960 INFO L226 Difference]: Without dead ends: 535 [2022-01-31 19:49:52,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3826 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=11663, Invalid=19489, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 19:49:52,961 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1128 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 1027 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1027 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:49:52,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1128 Valid, 23 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1027 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:49:52,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-01-31 19:49:53,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 532. [2022-01-31 19:49:53,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 527 states have (on average 1.0056925996204933) internal successors, (530), 527 states have internal predecessors, (530), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:53,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 534 transitions. [2022-01-31 19:49:53,230 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 534 transitions. Word has length 525 [2022-01-31 19:49:53,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:49:53,230 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 534 transitions. [2022-01-31 19:49:53,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 88 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:53,230 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 534 transitions. [2022-01-31 19:49:53,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2022-01-31 19:49:53,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:49:53,232 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:49:53,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 19:49:53,232 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:49:53,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:49:53,233 INFO L85 PathProgramCache]: Analyzing trace with hash 976620751, now seen corresponding path program 86 times [2022-01-31 19:49:53,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:49:53,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365898105] [2022-01-31 19:49:53,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:49:53,236 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:49:53,236 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:49:53,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:49:53,243 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:49:53,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:55,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:49:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:49:55,447 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:49:55,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365898105] [2022-01-31 19:49:55,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [365898105] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:49:55,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:49:55,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 19:49:55,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452578368] [2022-01-31 19:49:55,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:49:55,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 19:49:55,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:49:55,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 19:49:55,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3921, Invalid=4269, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 19:49:55,450 INFO L87 Difference]: Start difference. First operand 532 states and 534 transitions. Second operand has 91 states, 90 states have (on average 2.077777777777778) internal successors, (187), 89 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:59,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:49:59,009 INFO L93 Difference]: Finished difference Result 894 states and 900 transitions. [2022-01-31 19:49:59,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 19:49:59,009 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 2.077777777777778) internal successors, (187), 89 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 531 [2022-01-31 19:49:59,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:49:59,011 INFO L225 Difference]: With dead ends: 894 [2022-01-31 19:49:59,011 INFO L226 Difference]: Without dead ends: 541 [2022-01-31 19:49:59,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3914 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=11929, Invalid=19933, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 19:49:59,013 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1061 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 960 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 960 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:49:59,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1061 Valid, 25 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [960 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:49:59,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-01-31 19:49:59,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 538. [2022-01-31 19:49:59,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 533 states have (on average 1.0056285178236397) internal successors, (536), 533 states have internal predecessors, (536), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:59,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 540 transitions. [2022-01-31 19:49:59,237 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 540 transitions. Word has length 531 [2022-01-31 19:49:59,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:49:59,237 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 540 transitions. [2022-01-31 19:49:59,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 2.077777777777778) internal successors, (187), 89 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:59,238 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 540 transitions. [2022-01-31 19:49:59,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2022-01-31 19:49:59,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:49:59,240 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:49:59,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 19:49:59,240 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:49:59,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:49:59,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1704521591, now seen corresponding path program 87 times [2022-01-31 19:49:59,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:49:59,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719450919] [2022-01-31 19:49:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:49:59,242 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:49:59,242 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:49:59,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:49:59,249 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:49:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:01,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:50:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:50:01,842 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:50:01,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719450919] [2022-01-31 19:50:01,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1719450919] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:50:01,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:50:01,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 19:50:01,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967580791] [2022-01-31 19:50:01,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:50:01,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 19:50:01,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:50:01,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 19:50:01,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4010, Invalid=4362, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 19:50:01,844 INFO L87 Difference]: Start difference. First operand 538 states and 540 transitions. Second operand has 92 states, 91 states have (on average 2.076923076923077) internal successors, (189), 90 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:06,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:50:06,175 INFO L93 Difference]: Finished difference Result 904 states and 910 transitions. [2022-01-31 19:50:06,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 19:50:06,175 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 2.076923076923077) internal successors, (189), 90 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 537 [2022-01-31 19:50:06,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:50:06,177 INFO L225 Difference]: With dead ends: 904 [2022-01-31 19:50:06,177 INFO L226 Difference]: Without dead ends: 547 [2022-01-31 19:50:06,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4003 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=12198, Invalid=20382, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 19:50:06,182 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1174 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 1074 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1074 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:50:06,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1174 Valid, 25 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1074 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:50:06,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-01-31 19:50:06,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 544. [2022-01-31 19:50:06,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 539 states have (on average 1.0055658627087198) internal successors, (542), 539 states have internal predecessors, (542), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:06,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 546 transitions. [2022-01-31 19:50:06,422 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 546 transitions. Word has length 537 [2022-01-31 19:50:06,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:50:06,422 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 546 transitions. [2022-01-31 19:50:06,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 2.076923076923077) internal successors, (189), 90 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:06,423 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 546 transitions. [2022-01-31 19:50:06,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2022-01-31 19:50:06,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:50:06,425 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:50:06,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 19:50:06,425 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:50:06,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:50:06,425 INFO L85 PathProgramCache]: Analyzing trace with hash -888364861, now seen corresponding path program 88 times [2022-01-31 19:50:06,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:50:06,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445583403] [2022-01-31 19:50:06,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:50:06,427 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:50:06,427 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:50:06,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:50:06,435 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:50:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:09,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:50:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:50:09,124 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:50:09,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445583403] [2022-01-31 19:50:09,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [445583403] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:50:09,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:50:09,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 19:50:09,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709917614] [2022-01-31 19:50:09,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:50:09,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 19:50:09,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:50:09,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 19:50:09,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4100, Invalid=4456, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 19:50:09,126 INFO L87 Difference]: Start difference. First operand 544 states and 546 transitions. Second operand has 93 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 91 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:13,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:50:13,349 INFO L93 Difference]: Finished difference Result 914 states and 920 transitions. [2022-01-31 19:50:13,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 19:50:13,349 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 91 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 543 [2022-01-31 19:50:13,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:50:13,350 INFO L225 Difference]: With dead ends: 914 [2022-01-31 19:50:13,351 INFO L226 Difference]: Without dead ends: 553 [2022-01-31 19:50:13,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4093 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=12470, Invalid=20836, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 19:50:13,352 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1171 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 1068 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1171 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1068 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:50:13,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1171 Valid, 23 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1068 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:50:13,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-01-31 19:50:13,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 550. [2022-01-31 19:50:13,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 545 states have (on average 1.0055045871559634) internal successors, (548), 545 states have internal predecessors, (548), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:13,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 552 transitions. [2022-01-31 19:50:13,585 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 552 transitions. Word has length 543 [2022-01-31 19:50:13,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:50:13,586 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 552 transitions. [2022-01-31 19:50:13,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 91 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:13,586 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 552 transitions. [2022-01-31 19:50:13,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2022-01-31 19:50:13,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:50:13,588 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:50:13,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 19:50:13,588 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:50:13,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:50:13,589 INFO L85 PathProgramCache]: Analyzing trace with hash -154968707, now seen corresponding path program 89 times [2022-01-31 19:50:13,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:50:13,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917272064] [2022-01-31 19:50:13,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:50:13,590 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:50:13,590 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:50:13,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:50:13,598 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:50:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:16,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:50:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:50:16,323 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:50:16,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917272064] [2022-01-31 19:50:16,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1917272064] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:50:16,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:50:16,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 19:50:16,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23914648] [2022-01-31 19:50:16,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:50:16,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 19:50:16,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:50:16,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 19:50:16,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4191, Invalid=4551, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 19:50:16,326 INFO L87 Difference]: Start difference. First operand 550 states and 552 transitions. Second operand has 94 states, 93 states have (on average 2.075268817204301) internal successors, (193), 92 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:20,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:50:20,658 INFO L93 Difference]: Finished difference Result 924 states and 930 transitions. [2022-01-31 19:50:20,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 19:50:20,659 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 2.075268817204301) internal successors, (193), 92 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 549 [2022-01-31 19:50:20,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:50:20,660 INFO L225 Difference]: With dead ends: 924 [2022-01-31 19:50:20,660 INFO L226 Difference]: Without dead ends: 559 [2022-01-31 19:50:20,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4184 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=12745, Invalid=21295, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 19:50:20,662 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1330 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 1231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1330 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1231 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:50:20,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1330 Valid, 25 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1231 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:50:20,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-31 19:50:20,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 556. [2022-01-31 19:50:20,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 551 states have (on average 1.0054446460980035) internal successors, (554), 551 states have internal predecessors, (554), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:20,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 558 transitions. [2022-01-31 19:50:20,914 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 558 transitions. Word has length 549 [2022-01-31 19:50:20,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:50:20,914 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 558 transitions. [2022-01-31 19:50:20,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 2.075268817204301) internal successors, (193), 92 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:20,914 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 558 transitions. [2022-01-31 19:50:20,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2022-01-31 19:50:20,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:50:20,917 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:50:20,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 19:50:20,917 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:50:20,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:50:20,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1580197559, now seen corresponding path program 90 times [2022-01-31 19:50:20,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:50:20,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502933806] [2022-01-31 19:50:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:50:20,918 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:50:20,918 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:50:20,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:50:20,926 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:50:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:23,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:50:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:50:23,828 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:50:23,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502933806] [2022-01-31 19:50:23,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1502933806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:50:23,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:50:23,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 19:50:23,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739537846] [2022-01-31 19:50:23,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:50:23,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 19:50:23,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:50:23,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 19:50:23,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4283, Invalid=4647, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 19:50:23,830 INFO L87 Difference]: Start difference. First operand 556 states and 558 transitions. Second operand has 95 states, 94 states have (on average 2.074468085106383) internal successors, (195), 93 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:27,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:50:27,941 INFO L93 Difference]: Finished difference Result 934 states and 940 transitions. [2022-01-31 19:50:27,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 19:50:27,942 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 2.074468085106383) internal successors, (195), 93 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 555 [2022-01-31 19:50:27,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:50:27,943 INFO L225 Difference]: With dead ends: 934 [2022-01-31 19:50:27,943 INFO L226 Difference]: Without dead ends: 565 [2022-01-31 19:50:27,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4276 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13023, Invalid=21759, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 19:50:27,945 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1465 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 1361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1465 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1361 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:50:27,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1465 Valid, 21 Invalid, 1959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1361 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:50:27,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-01-31 19:50:28,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 562. [2022-01-31 19:50:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 557 states have (on average 1.0053859964093357) internal successors, (560), 557 states have internal predecessors, (560), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:28,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 564 transitions. [2022-01-31 19:50:28,199 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 564 transitions. Word has length 555 [2022-01-31 19:50:28,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:50:28,199 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 564 transitions. [2022-01-31 19:50:28,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 2.074468085106383) internal successors, (195), 93 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:28,199 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 564 transitions. [2022-01-31 19:50:28,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2022-01-31 19:50:28,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:50:28,202 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:50:28,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 19:50:28,202 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:50:28,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:50:28,202 INFO L85 PathProgramCache]: Analyzing trace with hash 838786161, now seen corresponding path program 91 times [2022-01-31 19:50:28,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:50:28,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412019465] [2022-01-31 19:50:28,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:50:28,205 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:50:28,205 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:50:28,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:50:28,213 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:50:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:30,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:50:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:50:30,546 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:50:30,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412019465] [2022-01-31 19:50:30,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1412019465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:50:30,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:50:30,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 19:50:30,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143509252] [2022-01-31 19:50:30,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:50:30,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 19:50:30,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:50:30,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 19:50:30,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4376, Invalid=4744, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 19:50:30,548 INFO L87 Difference]: Start difference. First operand 562 states and 564 transitions. Second operand has 96 states, 95 states have (on average 2.0736842105263156) internal successors, (197), 94 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:35,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:50:35,564 INFO L93 Difference]: Finished difference Result 944 states and 950 transitions. [2022-01-31 19:50:35,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 19:50:35,565 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 2.0736842105263156) internal successors, (197), 94 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 561 [2022-01-31 19:50:35,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:50:35,566 INFO L225 Difference]: With dead ends: 944 [2022-01-31 19:50:35,566 INFO L226 Difference]: Without dead ends: 571 [2022-01-31 19:50:35,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4369 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13304, Invalid=22228, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 19:50:35,568 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1362 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 1256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1256 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:50:35,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1362 Valid, 23 Invalid, 1870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1256 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:50:35,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-31 19:50:35,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 568. [2022-01-31 19:50:35,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 563 states have (on average 1.0053285968028418) internal successors, (566), 563 states have internal predecessors, (566), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:35,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 570 transitions. [2022-01-31 19:50:35,830 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 570 transitions. Word has length 561 [2022-01-31 19:50:35,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:50:35,830 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 570 transitions. [2022-01-31 19:50:35,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 2.0736842105263156) internal successors, (197), 94 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:35,830 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 570 transitions. [2022-01-31 19:50:35,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2022-01-31 19:50:35,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:50:35,833 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:50:35,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 19:50:35,833 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:50:35,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:50:35,833 INFO L85 PathProgramCache]: Analyzing trace with hash -320545109, now seen corresponding path program 92 times [2022-01-31 19:50:35,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:50:35,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981219417] [2022-01-31 19:50:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:50:35,835 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:50:35,835 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:50:35,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:50:35,843 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:50:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:38,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:50:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:50:38,333 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:50:38,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981219417] [2022-01-31 19:50:38,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [981219417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:50:38,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:50:38,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 19:50:38,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572162777] [2022-01-31 19:50:38,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:50:38,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 19:50:38,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:50:38,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 19:50:38,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4470, Invalid=4842, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 19:50:38,334 INFO L87 Difference]: Start difference. First operand 568 states and 570 transitions. Second operand has 97 states, 96 states have (on average 2.0729166666666665) internal successors, (199), 95 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:43,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:50:43,046 INFO L93 Difference]: Finished difference Result 954 states and 960 transitions. [2022-01-31 19:50:43,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 19:50:43,047 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 2.0729166666666665) internal successors, (199), 95 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 567 [2022-01-31 19:50:43,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:50:43,048 INFO L225 Difference]: With dead ends: 954 [2022-01-31 19:50:43,048 INFO L226 Difference]: Without dead ends: 577 [2022-01-31 19:50:43,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4463 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13588, Invalid=22702, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 19:50:43,050 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1483 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 1381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1483 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 1981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1381 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:50:43,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1483 Valid, 19 Invalid, 1981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1381 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:50:43,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-01-31 19:50:43,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 574. [2022-01-31 19:50:43,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 569 states have (on average 1.0052724077328647) internal successors, (572), 569 states have internal predecessors, (572), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 576 transitions. [2022-01-31 19:50:43,328 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 576 transitions. Word has length 567 [2022-01-31 19:50:43,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:50:43,328 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 576 transitions. [2022-01-31 19:50:43,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 2.0729166666666665) internal successors, (199), 95 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:43,328 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 576 transitions. [2022-01-31 19:50:43,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2022-01-31 19:50:43,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:50:43,331 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:50:43,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 19:50:43,331 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:50:43,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:50:43,331 INFO L85 PathProgramCache]: Analyzing trace with hash 765365605, now seen corresponding path program 93 times [2022-01-31 19:50:43,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:50:43,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918037938] [2022-01-31 19:50:43,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:50:43,332 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:50:43,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:50:43,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:50:43,341 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:50:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:46,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:50:46,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:50:46,366 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:50:46,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918037938] [2022-01-31 19:50:46,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1918037938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:50:46,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:50:46,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 19:50:46,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835735495] [2022-01-31 19:50:46,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:50:46,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 19:50:46,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:50:46,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 19:50:46,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 19:50:46,369 INFO L87 Difference]: Start difference. First operand 574 states and 576 transitions. Second operand has 98 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 96 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:51,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:50:51,908 INFO L93 Difference]: Finished difference Result 964 states and 970 transitions. [2022-01-31 19:50:51,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 19:50:51,909 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 96 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 573 [2022-01-31 19:50:51,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:50:51,910 INFO L225 Difference]: With dead ends: 964 [2022-01-31 19:50:51,910 INFO L226 Difference]: Without dead ends: 583 [2022-01-31 19:50:51,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4558 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=13875, Invalid=23181, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 19:50:51,912 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1386 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 1279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1279 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:50:51,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1386 Valid, 21 Invalid, 1895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1279 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:50:51,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-01-31 19:50:52,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 580. [2022-01-31 19:50:52,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 575 states have (on average 1.0052173913043478) internal successors, (578), 575 states have internal predecessors, (578), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:52,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 582 transitions. [2022-01-31 19:50:52,172 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 582 transitions. Word has length 573 [2022-01-31 19:50:52,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:50:52,172 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 582 transitions. [2022-01-31 19:50:52,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 96 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:52,173 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 582 transitions. [2022-01-31 19:50:52,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2022-01-31 19:50:52,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:50:52,175 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:50:52,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 19:50:52,175 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:50:52,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:50:52,176 INFO L85 PathProgramCache]: Analyzing trace with hash 284199071, now seen corresponding path program 94 times [2022-01-31 19:50:52,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:50:52,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635476345] [2022-01-31 19:50:52,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:50:52,181 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:50:52,181 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:50:52,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:50:52,193 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:50:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:55,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:50:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:50:55,375 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:50:55,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635476345] [2022-01-31 19:50:55,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [635476345] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:50:55,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:50:55,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 19:50:55,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199960699] [2022-01-31 19:50:55,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:50:55,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 19:50:55,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:50:55,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 19:50:55,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4661, Invalid=5041, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 19:50:55,378 INFO L87 Difference]: Start difference. First operand 580 states and 582 transitions. Second operand has 99 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 97 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:00,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:51:00,172 INFO L93 Difference]: Finished difference Result 974 states and 980 transitions. [2022-01-31 19:51:00,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 19:51:00,172 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 97 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 579 [2022-01-31 19:51:00,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:51:00,174 INFO L225 Difference]: With dead ends: 974 [2022-01-31 19:51:00,174 INFO L226 Difference]: Without dead ends: 589 [2022-01-31 19:51:00,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4654 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=14165, Invalid=23665, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 19:51:00,176 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1251 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 1145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1145 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:51:00,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1251 Valid, 25 Invalid, 1787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1145 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:51:00,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-31 19:51:00,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 586. [2022-01-31 19:51:00,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 581 states have (on average 1.0051635111876076) internal successors, (584), 581 states have internal predecessors, (584), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 588 transitions. [2022-01-31 19:51:00,457 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 588 transitions. Word has length 579 [2022-01-31 19:51:00,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:51:00,457 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 588 transitions. [2022-01-31 19:51:00,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 97 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:00,458 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 588 transitions. [2022-01-31 19:51:00,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2022-01-31 19:51:00,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:51:00,461 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:51:00,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 19:51:00,461 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:51:00,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:51:00,462 INFO L85 PathProgramCache]: Analyzing trace with hash 195522649, now seen corresponding path program 95 times [2022-01-31 19:51:00,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:51:00,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075019631] [2022-01-31 19:51:00,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:51:00,463 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:51:00,463 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:51:00,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:51:00,473 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:51:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:02,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:51:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:51:02,770 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:51:02,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075019631] [2022-01-31 19:51:02,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1075019631] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:51:02,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:51:02,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 19:51:02,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970133461] [2022-01-31 19:51:02,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:51:02,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 19:51:02,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:51:02,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 19:51:02,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4758, Invalid=5142, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 19:51:02,773 INFO L87 Difference]: Start difference. First operand 586 states and 588 transitions. Second operand has 100 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 98 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:07,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:51:07,701 INFO L93 Difference]: Finished difference Result 984 states and 990 transitions. [2022-01-31 19:51:07,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 19:51:07,705 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 98 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 585 [2022-01-31 19:51:07,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:51:07,706 INFO L225 Difference]: With dead ends: 984 [2022-01-31 19:51:07,706 INFO L226 Difference]: Without dead ends: 595 [2022-01-31 19:51:07,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4751 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=14458, Invalid=24154, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 19:51:07,708 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1306 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 1196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1306 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1196 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:51:07,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1306 Valid, 25 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1196 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:51:07,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-01-31 19:51:07,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 592. [2022-01-31 19:51:07,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 587 states have (on average 1.0051107325383304) internal successors, (590), 587 states have internal predecessors, (590), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:07,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 594 transitions. [2022-01-31 19:51:07,980 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 594 transitions. Word has length 585 [2022-01-31 19:51:07,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:51:07,981 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 594 transitions. [2022-01-31 19:51:07,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 98 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:07,981 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 594 transitions. [2022-01-31 19:51:07,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2022-01-31 19:51:07,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:51:07,983 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:51:07,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 19:51:07,984 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:51:07,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:51:07,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1150805139, now seen corresponding path program 96 times [2022-01-31 19:51:07,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:51:07,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575108616] [2022-01-31 19:51:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:51:07,985 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:51:07,985 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:51:07,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:51:07,995 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:51:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:11,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:51:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:51:11,281 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:51:11,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575108616] [2022-01-31 19:51:11,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1575108616] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:51:11,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:51:11,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 19:51:11,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135364973] [2022-01-31 19:51:11,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:51:11,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 19:51:11,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:51:11,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 19:51:11,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4856, Invalid=5244, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 19:51:11,285 INFO L87 Difference]: Start difference. First operand 592 states and 594 transitions. Second operand has 101 states, 100 states have (on average 2.07) internal successors, (207), 99 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:17,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:51:17,022 INFO L93 Difference]: Finished difference Result 994 states and 1000 transitions. [2022-01-31 19:51:17,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 19:51:17,022 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 100 states have (on average 2.07) internal successors, (207), 99 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 591 [2022-01-31 19:51:17,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:51:17,023 INFO L225 Difference]: With dead ends: 994 [2022-01-31 19:51:17,024 INFO L226 Difference]: Without dead ends: 601 [2022-01-31 19:51:17,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4849 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=14754, Invalid=24648, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 19:51:17,025 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1243 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 1134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1243 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1134 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:51:17,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1243 Valid, 27 Invalid, 1798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1134 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:51:17,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-01-31 19:51:17,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 598. [2022-01-31 19:51:17,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 593 states have (on average 1.0050590219224282) internal successors, (596), 593 states have internal predecessors, (596), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:17,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 600 transitions. [2022-01-31 19:51:17,324 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 600 transitions. Word has length 591 [2022-01-31 19:51:17,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:51:17,325 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 600 transitions. [2022-01-31 19:51:17,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 100 states have (on average 2.07) internal successors, (207), 99 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:17,325 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 600 transitions. [2022-01-31 19:51:17,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2022-01-31 19:51:17,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:51:17,328 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:51:17,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 19:51:17,328 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:51:17,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:51:17,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1855882573, now seen corresponding path program 97 times [2022-01-31 19:51:17,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:51:17,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207884095] [2022-01-31 19:51:17,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:51:17,329 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:51:17,330 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:51:17,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:51:17,339 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:51:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:20,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:51:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:51:20,805 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:51:20,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207884095] [2022-01-31 19:51:20,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1207884095] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:51:20,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:51:20,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 19:51:20,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524234239] [2022-01-31 19:51:20,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:51:20,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 19:51:20,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:51:20,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 19:51:20,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4955, Invalid=5347, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 19:51:20,808 INFO L87 Difference]: Start difference. First operand 598 states and 600 transitions. Second operand has 102 states, 101 states have (on average 2.0693069306930694) internal successors, (209), 100 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:26,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:51:26,221 INFO L93 Difference]: Finished difference Result 1004 states and 1010 transitions. [2022-01-31 19:51:26,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 19:51:26,221 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 101 states have (on average 2.0693069306930694) internal successors, (209), 100 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 597 [2022-01-31 19:51:26,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:51:26,235 INFO L225 Difference]: With dead ends: 1004 [2022-01-31 19:51:26,235 INFO L226 Difference]: Without dead ends: 607 [2022-01-31 19:51:26,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4948 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=15053, Invalid=25147, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 19:51:26,237 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1214 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 1106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1106 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:51:26,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1214 Valid, 27 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1106 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:51:26,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-01-31 19:51:26,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 604. [2022-01-31 19:51:26,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 599 states have (on average 1.005008347245409) internal successors, (602), 599 states have internal predecessors, (602), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:26,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 606 transitions. [2022-01-31 19:51:26,546 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 606 transitions. Word has length 597 [2022-01-31 19:51:26,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:51:26,546 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 606 transitions. [2022-01-31 19:51:26,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 101 states have (on average 2.0693069306930694) internal successors, (209), 100 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:26,546 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 606 transitions. [2022-01-31 19:51:26,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2022-01-31 19:51:26,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:51:26,551 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:51:26,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 19:51:26,551 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:51:26,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:51:26,551 INFO L85 PathProgramCache]: Analyzing trace with hash 580907655, now seen corresponding path program 98 times [2022-01-31 19:51:26,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:51:26,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451491314] [2022-01-31 19:51:26,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:51:26,555 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:51:26,556 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:51:26,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:51:26,567 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:51:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:29,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:51:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:51:29,768 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:51:29,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451491314] [2022-01-31 19:51:29,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [451491314] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:51:29,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:51:29,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 19:51:29,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489546092] [2022-01-31 19:51:29,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:51:29,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 19:51:29,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:51:29,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 19:51:29,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5055, Invalid=5451, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 19:51:29,770 INFO L87 Difference]: Start difference. First operand 604 states and 606 transitions. Second operand has 103 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 101 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:34,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:51:34,913 INFO L93 Difference]: Finished difference Result 1014 states and 1020 transitions. [2022-01-31 19:51:34,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 19:51:34,913 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 101 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 603 [2022-01-31 19:51:34,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:51:34,927 INFO L225 Difference]: With dead ends: 1014 [2022-01-31 19:51:34,927 INFO L226 Difference]: Without dead ends: 613 [2022-01-31 19:51:34,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5048 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=15355, Invalid=25651, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 19:51:34,929 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1401 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 1291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1291 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:51:34,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1401 Valid, 19 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1291 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:51:34,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-01-31 19:51:35,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 610. [2022-01-31 19:51:35,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 605 states have (on average 1.0049586776859505) internal successors, (608), 605 states have internal predecessors, (608), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:35,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 612 transitions. [2022-01-31 19:51:35,274 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 612 transitions. Word has length 603 [2022-01-31 19:51:35,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:51:35,275 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 612 transitions. [2022-01-31 19:51:35,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 101 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:35,275 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 612 transitions. [2022-01-31 19:51:35,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2022-01-31 19:51:35,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:51:35,280 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:51:35,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 19:51:35,280 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:51:35,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:51:35,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1182217151, now seen corresponding path program 99 times [2022-01-31 19:51:35,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:51:35,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884074150] [2022-01-31 19:51:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:51:35,286 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:51:35,286 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:51:35,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:51:35,296 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:51:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:37,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:51:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:37,604 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 19:51:37,605 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:51:37,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884074150] [2022-01-31 19:51:37,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [884074150] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:51:37,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:51:37,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 19:51:37,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959232126] [2022-01-31 19:51:37,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:51:37,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 19:51:37,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:51:37,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 19:51:37,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 19:51:37,610 INFO L87 Difference]: Start difference. First operand 610 states and 612 transitions. Second operand has 104 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 102 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:42,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:51:42,514 INFO L93 Difference]: Finished difference Result 1024 states and 1030 transitions. [2022-01-31 19:51:42,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 19:51:42,514 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 102 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 609 [2022-01-31 19:51:42,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:51:42,515 INFO L225 Difference]: With dead ends: 1024 [2022-01-31 19:51:42,515 INFO L226 Difference]: Without dead ends: 619 [2022-01-31 19:51:42,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5149 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=15660, Invalid=26160, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 19:51:42,518 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1264 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 1150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1150 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:51:42,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1264 Valid, 25 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1150 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:51:42,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-01-31 19:51:42,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 616. [2022-01-31 19:51:42,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 611 states have (on average 1.004909983633388) internal successors, (614), 611 states have internal predecessors, (614), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 618 transitions. [2022-01-31 19:51:42,862 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 618 transitions. Word has length 609 [2022-01-31 19:51:42,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:51:42,862 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 618 transitions. [2022-01-31 19:51:42,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 102 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:42,862 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 618 transitions. [2022-01-31 19:51:42,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2022-01-31 19:51:42,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:51:42,865 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:51:42,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 19:51:42,865 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:51:42,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:51:42,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1504857477, now seen corresponding path program 100 times [2022-01-31 19:51:42,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:51:42,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319502171] [2022-01-31 19:51:42,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:51:42,866 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:51:42,867 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:51:42,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:51:42,876 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:51:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:46,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:51:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:51:46,296 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:51:46,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319502171] [2022-01-31 19:51:46,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1319502171] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:51:46,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:51:46,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 19:51:46,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18885580] [2022-01-31 19:51:46,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:51:46,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 19:51:46,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:51:46,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 19:51:46,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5258, Invalid=5662, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 19:51:46,310 INFO L87 Difference]: Start difference. First operand 616 states and 618 transitions. Second operand has 105 states, 104 states have (on average 2.0673076923076925) internal successors, (215), 103 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:51,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:51:51,901 INFO L93 Difference]: Finished difference Result 1034 states and 1040 transitions. [2022-01-31 19:51:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 19:51:51,901 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 2.0673076923076925) internal successors, (215), 103 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 615 [2022-01-31 19:51:51,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:51:51,902 INFO L225 Difference]: With dead ends: 1034 [2022-01-31 19:51:51,902 INFO L226 Difference]: Without dead ends: 625 [2022-01-31 19:51:51,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5251 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=15968, Invalid=26674, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 19:51:51,904 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1313 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 1198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1313 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1198 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:51:51,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1313 Valid, 25 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1198 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:51:51,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-01-31 19:51:52,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 622. [2022-01-31 19:51:52,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 617 states have (on average 1.0048622366288493) internal successors, (620), 617 states have internal predecessors, (620), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 624 transitions. [2022-01-31 19:51:52,215 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 624 transitions. Word has length 615 [2022-01-31 19:51:52,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:51:52,215 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 624 transitions. [2022-01-31 19:51:52,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 104 states have (on average 2.0673076923076925) internal successors, (215), 103 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:52,215 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 624 transitions. [2022-01-31 19:51:52,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2022-01-31 19:51:52,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:51:52,218 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:51:52,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 19:51:52,218 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:51:52,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:51:52,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1340818741, now seen corresponding path program 101 times [2022-01-31 19:51:52,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:51:52,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399190419] [2022-01-31 19:51:52,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:51:52,219 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:51:52,219 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:51:52,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:51:52,229 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:51:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:55,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:51:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:51:55,276 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:51:55,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399190419] [2022-01-31 19:51:55,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1399190419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:51:55,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:51:55,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 19:51:55,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163699502] [2022-01-31 19:51:55,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:51:55,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 19:51:55,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:51:55,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 19:51:55,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5361, Invalid=5769, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 19:51:55,278 INFO L87 Difference]: Start difference. First operand 622 states and 624 transitions. Second operand has 106 states, 105 states have (on average 2.066666666666667) internal successors, (217), 104 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:52:00,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:52:00,433 INFO L93 Difference]: Finished difference Result 1044 states and 1050 transitions. [2022-01-31 19:52:00,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 19:52:00,433 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 2.066666666666667) internal successors, (217), 104 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 621 [2022-01-31 19:52:00,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:52:00,434 INFO L225 Difference]: With dead ends: 1044 [2022-01-31 19:52:00,434 INFO L226 Difference]: Without dead ends: 631 [2022-01-31 19:52:00,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5354 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=16279, Invalid=27193, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 19:52:00,436 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1574 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 1462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1574 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 2116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1462 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:52:00,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1574 Valid, 19 Invalid, 2116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1462 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:52:00,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-01-31 19:52:00,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 628. [2022-01-31 19:52:00,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 623 states have (on average 1.0048154093097914) internal successors, (626), 623 states have internal predecessors, (626), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:52:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 630 transitions. [2022-01-31 19:52:00,744 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 630 transitions. Word has length 621 [2022-01-31 19:52:00,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:52:00,744 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 630 transitions. [2022-01-31 19:52:00,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 2.066666666666667) internal successors, (217), 104 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:52:00,744 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 630 transitions. [2022-01-31 19:52:00,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2022-01-31 19:52:00,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:52:00,747 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:52:00,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 19:52:00,747 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:52:00,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:52:00,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1801856111, now seen corresponding path program 102 times [2022-01-31 19:52:00,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:52:00,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406214925] [2022-01-31 19:52:00,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:52:00,748 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:52:00,748 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:52:00,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:52:00,758 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:52:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:52:03,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:52:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:52:03,753 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 19:52:03,753 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:52:03,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406214925] [2022-01-31 19:52:03,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [406214925] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:52:03,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:52:03,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 19:52:03,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889152782] [2022-01-31 19:52:03,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:52:03,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 19:52:03,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:52:03,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 19:52:03,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5465, Invalid=5877, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 19:52:03,756 INFO L87 Difference]: Start difference. First operand 628 states and 630 transitions. Second operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 105 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:52:09,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:52:09,356 INFO L93 Difference]: Finished difference Result 1054 states and 1060 transitions. [2022-01-31 19:52:09,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 19:52:09,356 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 105 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 627 [2022-01-31 19:52:09,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:52:09,357 INFO L225 Difference]: With dead ends: 1054 [2022-01-31 19:52:09,357 INFO L226 Difference]: Without dead ends: 637 [2022-01-31 19:52:09,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5458 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=16593, Invalid=27717, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 19:52:09,359 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1505 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 1392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 2062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1392 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:52:09,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1505 Valid, 21 Invalid, 2062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1392 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:52:09,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-01-31 19:52:09,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 634. [2022-01-31 19:52:09,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 629 states have (on average 1.0047694753577106) internal successors, (632), 629 states have internal predecessors, (632), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:52:09,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 636 transitions. [2022-01-31 19:52:09,681 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 636 transitions. Word has length 627 [2022-01-31 19:52:09,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:52:09,681 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 636 transitions. [2022-01-31 19:52:09,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 105 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:52:09,681 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 636 transitions. [2022-01-31 19:52:09,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 634 [2022-01-31 19:52:09,684 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:52:09,684 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:52:09,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 19:52:09,684 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:52:09,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:52:09,684 INFO L85 PathProgramCache]: Analyzing trace with hash -708120535, now seen corresponding path program 103 times [2022-01-31 19:52:09,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:52:09,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489311820] [2022-01-31 19:52:09,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:52:09,685 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:52:09,685 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:52:09,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:52:09,695 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:52:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:52:13,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:52:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:52:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:52:13,216 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:52:13,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489311820] [2022-01-31 19:52:13,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1489311820] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:52:13,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:52:13,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 19:52:13,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926486954] [2022-01-31 19:52:13,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:52:13,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 19:52:13,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:52:13,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 19:52:13,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5570, Invalid=5986, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 19:52:13,218 INFO L87 Difference]: Start difference. First operand 634 states and 636 transitions. Second operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 106 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:52:18,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:52:18,719 INFO L93 Difference]: Finished difference Result 1064 states and 1070 transitions. [2022-01-31 19:52:18,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 19:52:18,719 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 106 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 633 [2022-01-31 19:52:18,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:52:18,720 INFO L225 Difference]: With dead ends: 1064 [2022-01-31 19:52:18,720 INFO L226 Difference]: Without dead ends: 643 [2022-01-31 19:52:18,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5563 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=16910, Invalid=28246, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 19:52:18,722 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1482 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 1364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1482 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 2060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1364 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:52:18,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1482 Valid, 25 Invalid, 2060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1364 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:52:18,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-01-31 19:52:19,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 640. [2022-01-31 19:52:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 635 states have (on average 1.0047244094488188) internal successors, (638), 635 states have internal predecessors, (638), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:52:19,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 642 transitions. [2022-01-31 19:52:19,038 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 642 transitions. Word has length 633 [2022-01-31 19:52:19,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:52:19,039 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 642 transitions. [2022-01-31 19:52:19,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 106 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:52:19,039 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 642 transitions. [2022-01-31 19:52:19,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2022-01-31 19:52:19,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:52:19,042 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:52:19,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 19:52:19,042 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:52:19,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:52:19,042 INFO L85 PathProgramCache]: Analyzing trace with hash -298956701, now seen corresponding path program 104 times [2022-01-31 19:52:19,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:52:19,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597940006] [2022-01-31 19:52:19,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:52:19,043 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:52:19,043 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:52:19,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:52:19,054 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:52:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:52:23,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:52:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:52:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:52:23,075 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:52:23,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597940006] [2022-01-31 19:52:23,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1597940006] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:52:23,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:52:23,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 19:52:23,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87806964] [2022-01-31 19:52:23,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:52:23,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 19:52:23,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:52:23,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 19:52:23,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5676, Invalid=6096, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 19:52:23,078 INFO L87 Difference]: Start difference. First operand 640 states and 642 transitions. Second operand has 109 states, 108 states have (on average 2.064814814814815) internal successors, (223), 107 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:52:28,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:52:28,869 INFO L93 Difference]: Finished difference Result 1074 states and 1080 transitions. [2022-01-31 19:52:28,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 19:52:28,870 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 108 states have (on average 2.064814814814815) internal successors, (223), 107 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 639 [2022-01-31 19:52:28,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:52:28,870 INFO L225 Difference]: With dead ends: 1074 [2022-01-31 19:52:28,871 INFO L226 Difference]: Without dead ends: 649 [2022-01-31 19:52:28,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5669 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=17230, Invalid=28780, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 19:52:28,873 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1473 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 1355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1473 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1355 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:52:28,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1473 Valid, 31 Invalid, 2087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1355 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:52:28,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-01-31 19:52:29,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 646. [2022-01-31 19:52:29,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 641 states have (on average 1.0046801872074882) internal successors, (644), 641 states have internal predecessors, (644), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:52:29,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 648 transitions. [2022-01-31 19:52:29,222 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 648 transitions. Word has length 639 [2022-01-31 19:52:29,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:52:29,222 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 648 transitions. [2022-01-31 19:52:29,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 108 states have (on average 2.064814814814815) internal successors, (223), 107 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:52:29,223 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 648 transitions. [2022-01-31 19:52:29,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2022-01-31 19:52:29,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:52:29,226 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:52:29,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 19:52:29,226 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:52:29,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:52:29,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1873595677, now seen corresponding path program 105 times [2022-01-31 19:52:29,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:52:29,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392227833] [2022-01-31 19:52:29,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:52:29,228 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:52:29,228 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:52:29,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:52:29,238 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:52:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:52:32,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:52:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:52:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:52:32,316 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:52:32,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392227833] [2022-01-31 19:52:32,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1392227833] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:52:32,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:52:32,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 19:52:32,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571103267] [2022-01-31 19:52:32,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:52:32,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 19:52:32,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:52:32,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 19:52:32,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5783, Invalid=6207, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 19:52:32,319 INFO L87 Difference]: Start difference. First operand 646 states and 648 transitions. Second operand has 110 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 108 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:52:38,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:52:38,231 INFO L93 Difference]: Finished difference Result 1084 states and 1090 transitions. [2022-01-31 19:52:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 19:52:38,234 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 108 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 645 [2022-01-31 19:52:38,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:52:38,235 INFO L225 Difference]: With dead ends: 1084 [2022-01-31 19:52:38,235 INFO L226 Difference]: Without dead ends: 655 [2022-01-31 19:52:38,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5776 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=17553, Invalid=29319, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 19:52:38,237 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1510 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 1389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1510 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1389 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:52:38,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1510 Valid, 21 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1389 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:52:38,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-01-31 19:52:38,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 652. [2022-01-31 19:52:38,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 647 states have (on average 1.0046367851622875) internal successors, (650), 647 states have internal predecessors, (650), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:52:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 654 transitions. [2022-01-31 19:52:38,577 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 654 transitions. Word has length 645 [2022-01-31 19:52:38,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:52:38,577 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 654 transitions. [2022-01-31 19:52:38,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 108 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:52:38,577 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 654 transitions. [2022-01-31 19:52:38,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2022-01-31 19:52:38,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:52:38,580 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:52:38,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 19:52:38,580 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:52:38,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:52:38,580 INFO L85 PathProgramCache]: Analyzing trace with hash -882172329, now seen corresponding path program 106 times [2022-01-31 19:52:38,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:52:38,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439157379] [2022-01-31 19:52:38,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:52:38,581 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:52:38,582 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:52:38,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:52:38,592 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:52:38,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:52:42,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:52:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:52:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:52:42,419 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:52:42,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439157379] [2022-01-31 19:52:42,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1439157379] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:52:42,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:52:42,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 19:52:42,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609375500] [2022-01-31 19:52:42,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:52:42,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 19:52:42,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:52:42,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 19:52:42,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5891, Invalid=6319, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 19:52:42,424 INFO L87 Difference]: Start difference. First operand 652 states and 654 transitions. Second operand has 111 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 109 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:52:48,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:52:48,424 INFO L93 Difference]: Finished difference Result 1094 states and 1100 transitions. [2022-01-31 19:52:48,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 19:52:48,424 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 109 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 651 [2022-01-31 19:52:48,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:52:48,425 INFO L225 Difference]: With dead ends: 1094 [2022-01-31 19:52:48,425 INFO L226 Difference]: Without dead ends: 661 [2022-01-31 19:52:48,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5884 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=17879, Invalid=29863, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 19:52:48,427 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1435 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 1318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1318 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:52:48,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1435 Valid, 25 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1318 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:52:48,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-01-31 19:52:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 658. [2022-01-31 19:52:48,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 653 states have (on average 1.004594180704441) internal successors, (656), 653 states have internal predecessors, (656), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:52:48,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 660 transitions. [2022-01-31 19:52:48,775 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 660 transitions. Word has length 651 [2022-01-31 19:52:48,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:52:48,775 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 660 transitions. [2022-01-31 19:52:48,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 109 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:52:48,775 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 660 transitions. [2022-01-31 19:52:48,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2022-01-31 19:52:48,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:52:48,778 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:52:48,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 19:52:48,778 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:52:48,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:52:48,778 INFO L85 PathProgramCache]: Analyzing trace with hash 43375633, now seen corresponding path program 107 times [2022-01-31 19:52:48,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:52:48,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453227001] [2022-01-31 19:52:48,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:52:48,779 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:52:48,780 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:52:48,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:52:48,790 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:52:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:52:52,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:52:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:52:52,655 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 19:52:52,655 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:52:52,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453227001] [2022-01-31 19:52:52,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1453227001] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:52:52,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:52:52,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 19:52:52,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237906743] [2022-01-31 19:52:52,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:52:52,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 19:52:52,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:52:52,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 19:52:52,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6000, Invalid=6432, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 19:52:52,658 INFO L87 Difference]: Start difference. First operand 658 states and 660 transitions. Second operand has 112 states, 111 states have (on average 2.063063063063063) internal successors, (229), 110 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:52:58,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:52:58,344 INFO L93 Difference]: Finished difference Result 1104 states and 1110 transitions. [2022-01-31 19:52:58,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 19:52:58,344 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 111 states have (on average 2.063063063063063) internal successors, (229), 110 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 657 [2022-01-31 19:52:58,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:52:58,345 INFO L225 Difference]: With dead ends: 1104 [2022-01-31 19:52:58,345 INFO L226 Difference]: Without dead ends: 667 [2022-01-31 19:52:58,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5993 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=18208, Invalid=30412, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 19:52:58,347 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1406 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 1284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1406 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 2004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1284 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:52:58,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1406 Valid, 25 Invalid, 2004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1284 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:52:58,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-01-31 19:52:58,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 664. [2022-01-31 19:52:58,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 659 states have (on average 1.0045523520485584) internal successors, (662), 659 states have internal predecessors, (662), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:52:58,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 666 transitions. [2022-01-31 19:52:58,713 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 666 transitions. Word has length 657 [2022-01-31 19:52:58,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:52:58,713 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 666 transitions. [2022-01-31 19:52:58,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 111 states have (on average 2.063063063063063) internal successors, (229), 110 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:52:58,713 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 666 transitions. [2022-01-31 19:52:58,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2022-01-31 19:52:58,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:52:58,716 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:52:58,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 19:52:58,716 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:52:58,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:52:58,716 INFO L85 PathProgramCache]: Analyzing trace with hash 6399563, now seen corresponding path program 108 times [2022-01-31 19:52:58,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:52:58,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530464290] [2022-01-31 19:52:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:52:58,720 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:52:58,720 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:52:58,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:52:58,731 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:52:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:53:02,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:53:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:53:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:53:02,845 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:53:02,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530464290] [2022-01-31 19:53:02,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1530464290] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:53:02,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:53:02,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 19:53:02,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802706613] [2022-01-31 19:53:02,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:53:02,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 19:53:02,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:53:02,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 19:53:02,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6110, Invalid=6546, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 19:53:02,848 INFO L87 Difference]: Start difference. First operand 664 states and 666 transitions. Second operand has 113 states, 112 states have (on average 2.0625) internal successors, (231), 111 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:09,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:53:09,230 INFO L93 Difference]: Finished difference Result 1114 states and 1120 transitions. [2022-01-31 19:53:09,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 19:53:09,230 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 112 states have (on average 2.0625) internal successors, (231), 111 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 663 [2022-01-31 19:53:09,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:53:09,231 INFO L225 Difference]: With dead ends: 1114 [2022-01-31 19:53:09,232 INFO L226 Difference]: Without dead ends: 673 [2022-01-31 19:53:09,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6103 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=18540, Invalid=30966, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 19:53:09,234 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1523 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 1405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 2111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1405 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:53:09,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 21 Invalid, 2111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1405 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:53:09,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-01-31 19:53:09,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 670. [2022-01-31 19:53:09,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 665 states have (on average 1.0045112781954888) internal successors, (668), 665 states have internal predecessors, (668), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:09,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 672 transitions. [2022-01-31 19:53:09,595 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 672 transitions. Word has length 663 [2022-01-31 19:53:09,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:53:09,595 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 672 transitions. [2022-01-31 19:53:09,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 112 states have (on average 2.0625) internal successors, (231), 111 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:09,595 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 672 transitions. [2022-01-31 19:53:09,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2022-01-31 19:53:09,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:53:09,598 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:53:09,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 19:53:09,599 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:53:09,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:53:09,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1946885381, now seen corresponding path program 109 times [2022-01-31 19:53:09,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:53:09,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547928484] [2022-01-31 19:53:09,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:53:09,600 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:53:09,600 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:53:09,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:53:09,612 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:53:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:53:13,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:53:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:53:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:53:13,377 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:53:13,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547928484] [2022-01-31 19:53:13,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1547928484] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:53:13,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:53:13,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 19:53:13,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396025802] [2022-01-31 19:53:13,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:53:13,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 19:53:13,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:53:13,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 19:53:13,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6221, Invalid=6661, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 19:53:13,381 INFO L87 Difference]: Start difference. First operand 670 states and 672 transitions. Second operand has 114 states, 113 states have (on average 2.061946902654867) internal successors, (233), 112 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:19,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:53:19,374 INFO L93 Difference]: Finished difference Result 1124 states and 1130 transitions. [2022-01-31 19:53:19,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 19:53:19,374 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 113 states have (on average 2.061946902654867) internal successors, (233), 112 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 669 [2022-01-31 19:53:19,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:53:19,375 INFO L225 Difference]: With dead ends: 1124 [2022-01-31 19:53:19,376 INFO L226 Difference]: Without dead ends: 679 [2022-01-31 19:53:19,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6214 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=18875, Invalid=31525, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 19:53:19,378 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1292 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 1170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1170 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:53:19,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1292 Valid, 33 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1170 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:53:19,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-31 19:53:19,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 676. [2022-01-31 19:53:19,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 671 states have (on average 1.0044709388971684) internal successors, (674), 671 states have internal predecessors, (674), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 678 transitions. [2022-01-31 19:53:19,739 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 678 transitions. Word has length 669 [2022-01-31 19:53:19,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:53:19,739 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 678 transitions. [2022-01-31 19:53:19,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 113 states have (on average 2.061946902654867) internal successors, (233), 112 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:19,739 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 678 transitions. [2022-01-31 19:53:19,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2022-01-31 19:53:19,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:53:19,743 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:53:19,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 19:53:19,743 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:53:19,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:53:19,743 INFO L85 PathProgramCache]: Analyzing trace with hash 718725183, now seen corresponding path program 110 times [2022-01-31 19:53:19,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:53:19,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518689423] [2022-01-31 19:53:19,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:53:19,744 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:53:19,744 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:53:19,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:53:19,766 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:53:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:53:23,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:53:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:53:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:53:23,831 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:53:23,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518689423] [2022-01-31 19:53:23,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [518689423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:53:23,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:53:23,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 19:53:23,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708259771] [2022-01-31 19:53:23,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:53:23,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 19:53:23,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:53:23,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 19:53:23,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6333, Invalid=6777, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 19:53:23,834 INFO L87 Difference]: Start difference. First operand 676 states and 678 transitions. Second operand has 115 states, 114 states have (on average 2.06140350877193) internal successors, (235), 113 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:30,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:53:30,831 INFO L93 Difference]: Finished difference Result 1134 states and 1140 transitions. [2022-01-31 19:53:30,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 19:53:30,831 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 114 states have (on average 2.06140350877193) internal successors, (235), 113 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 675 [2022-01-31 19:53:30,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:53:30,833 INFO L225 Difference]: With dead ends: 1134 [2022-01-31 19:53:30,833 INFO L226 Difference]: Without dead ends: 685 [2022-01-31 19:53:30,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=19213, Invalid=32089, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 19:53:30,836 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1553 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 1431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1553 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 2149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1431 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:53:30,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1553 Valid, 21 Invalid, 2149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1431 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:53:30,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-01-31 19:53:31,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 682. [2022-01-31 19:53:31,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 677 states have (on average 1.0044313146233383) internal successors, (680), 677 states have internal predecessors, (680), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:31,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 684 transitions. [2022-01-31 19:53:31,216 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 684 transitions. Word has length 675 [2022-01-31 19:53:31,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:53:31,217 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 684 transitions. [2022-01-31 19:53:31,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 114 states have (on average 2.06140350877193) internal successors, (235), 113 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:31,217 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 684 transitions. [2022-01-31 19:53:31,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 682 [2022-01-31 19:53:31,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:53:31,220 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:53:31,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 19:53:31,220 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:53:31,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:53:31,220 INFO L85 PathProgramCache]: Analyzing trace with hash -367947783, now seen corresponding path program 111 times [2022-01-31 19:53:31,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:53:31,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108168617] [2022-01-31 19:53:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:53:31,221 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:53:31,221 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:53:31,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:53:31,234 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:53:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:53:34,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:53:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:53:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:53:34,083 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:53:34,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108168617] [2022-01-31 19:53:34,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2108168617] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:53:34,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:53:34,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 19:53:34,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675485433] [2022-01-31 19:53:34,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:53:34,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 19:53:34,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:53:34,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 19:53:34,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6446, Invalid=6894, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 19:53:34,086 INFO L87 Difference]: Start difference. First operand 682 states and 684 transitions. Second operand has 116 states, 115 states have (on average 2.0608695652173914) internal successors, (237), 114 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:40,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:53:40,503 INFO L93 Difference]: Finished difference Result 1144 states and 1150 transitions. [2022-01-31 19:53:40,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 19:53:40,503 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 2.0608695652173914) internal successors, (237), 114 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 681 [2022-01-31 19:53:40,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:53:40,504 INFO L225 Difference]: With dead ends: 1144 [2022-01-31 19:53:40,504 INFO L226 Difference]: Without dead ends: 691 [2022-01-31 19:53:40,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6439 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=19554, Invalid=32658, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 19:53:40,507 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1644 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 1521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 2235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1521 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:53:40,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1644 Valid, 19 Invalid, 2235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1521 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:53:40,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-01-31 19:53:40,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 688. [2022-01-31 19:53:40,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 683 states have (on average 1.0043923865300146) internal successors, (686), 683 states have internal predecessors, (686), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:40,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 690 transitions. [2022-01-31 19:53:40,890 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 690 transitions. Word has length 681 [2022-01-31 19:53:40,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:53:40,890 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 690 transitions. [2022-01-31 19:53:40,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 2.0608695652173914) internal successors, (237), 114 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:40,890 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 690 transitions. [2022-01-31 19:53:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2022-01-31 19:53:40,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:53:40,894 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:53:40,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 19:53:40,894 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:53:40,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:53:40,894 INFO L85 PathProgramCache]: Analyzing trace with hash -921711565, now seen corresponding path program 112 times [2022-01-31 19:53:40,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:53:40,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370687248] [2022-01-31 19:53:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:53:40,895 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:53:40,895 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:53:40,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:53:40,910 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:53:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:53:44,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:53:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:53:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:53:44,078 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:53:44,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370687248] [2022-01-31 19:53:44,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1370687248] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:53:44,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:53:44,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 19:53:44,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773346872] [2022-01-31 19:53:44,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:53:44,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 19:53:44,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:53:44,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 19:53:44,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6560, Invalid=7012, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 19:53:44,080 INFO L87 Difference]: Start difference. First operand 688 states and 690 transitions. Second operand has 117 states, 116 states have (on average 2.060344827586207) internal successors, (239), 115 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:50,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:53:50,491 INFO L93 Difference]: Finished difference Result 1154 states and 1160 transitions. [2022-01-31 19:53:50,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 19:53:50,492 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 116 states have (on average 2.060344827586207) internal successors, (239), 115 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 687 [2022-01-31 19:53:50,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:53:50,493 INFO L225 Difference]: With dead ends: 1154 [2022-01-31 19:53:50,493 INFO L226 Difference]: Without dead ends: 697 [2022-01-31 19:53:50,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6553 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=19898, Invalid=33232, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 19:53:50,495 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1435 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 1310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1310 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:53:50,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1435 Valid, 27 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1310 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:53:50,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-01-31 19:53:50,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 694. [2022-01-31 19:53:50,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 689 states have (on average 1.004354136429608) internal successors, (692), 689 states have internal predecessors, (692), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:50,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 696 transitions. [2022-01-31 19:53:50,884 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 696 transitions. Word has length 687 [2022-01-31 19:53:50,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:53:50,885 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 696 transitions. [2022-01-31 19:53:50,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 116 states have (on average 2.060344827586207) internal successors, (239), 115 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:50,885 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 696 transitions. [2022-01-31 19:53:50,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2022-01-31 19:53:50,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:53:50,888 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:53:50,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 19:53:50,889 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:53:50,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:53:50,889 INFO L85 PathProgramCache]: Analyzing trace with hash 187577581, now seen corresponding path program 113 times [2022-01-31 19:53:50,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:53:50,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773120919] [2022-01-31 19:53:50,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:53:50,890 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:53:50,890 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:53:50,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:53:50,903 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:53:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:53:55,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:53:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:53:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:53:55,292 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:53:55,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773120919] [2022-01-31 19:53:55,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [773120919] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:53:55,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:53:55,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 19:53:55,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123549065] [2022-01-31 19:53:55,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:53:55,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 19:53:55,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:53:55,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 19:53:55,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6675, Invalid=7131, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 19:53:55,296 INFO L87 Difference]: Start difference. First operand 694 states and 696 transitions. Second operand has 118 states, 117 states have (on average 2.0598290598290596) internal successors, (241), 116 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:02,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:54:02,064 INFO L93 Difference]: Finished difference Result 1164 states and 1170 transitions. [2022-01-31 19:54:02,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 19:54:02,065 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 117 states have (on average 2.0598290598290596) internal successors, (241), 116 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 693 [2022-01-31 19:54:02,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:54:02,066 INFO L225 Difference]: With dead ends: 1164 [2022-01-31 19:54:02,066 INFO L226 Difference]: Without dead ends: 703 [2022-01-31 19:54:02,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6668 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=20245, Invalid=33811, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 19:54:02,068 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1312 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 1184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1312 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1184 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:54:02,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1312 Valid, 31 Invalid, 1970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1184 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:54:02,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-01-31 19:54:02,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 700. [2022-01-31 19:54:02,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 695 states have (on average 1.0043165467625899) internal successors, (698), 695 states have internal predecessors, (698), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:02,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 702 transitions. [2022-01-31 19:54:02,463 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 702 transitions. Word has length 693 [2022-01-31 19:54:02,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:54:02,463 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 702 transitions. [2022-01-31 19:54:02,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 117 states have (on average 2.0598290598290596) internal successors, (241), 116 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:02,463 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 702 transitions. [2022-01-31 19:54:02,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2022-01-31 19:54:02,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:02,467 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:54:02,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 19:54:02,468 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:02,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:02,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2043767335, now seen corresponding path program 114 times [2022-01-31 19:54:02,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:02,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117901483] [2022-01-31 19:54:02,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:02,469 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:54:02,469 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:54:02,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:02,482 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:06,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:54:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:54:06,137 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:54:06,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117901483] [2022-01-31 19:54:06,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2117901483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:54:06,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:54:06,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 19:54:06,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204543336] [2022-01-31 19:54:06,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:54:06,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 19:54:06,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:54:06,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 19:54:06,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6791, Invalid=7251, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 19:54:06,141 INFO L87 Difference]: Start difference. First operand 700 states and 702 transitions. Second operand has 119 states, 118 states have (on average 2.059322033898305) internal successors, (243), 117 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:13,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:54:13,743 INFO L93 Difference]: Finished difference Result 1174 states and 1180 transitions. [2022-01-31 19:54:13,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 19:54:13,743 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 118 states have (on average 2.059322033898305) internal successors, (243), 117 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 699 [2022-01-31 19:54:13,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:54:13,744 INFO L225 Difference]: With dead ends: 1174 [2022-01-31 19:54:13,745 INFO L226 Difference]: Without dead ends: 709 [2022-01-31 19:54:13,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6784 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=20595, Invalid=34395, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 19:54:13,747 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1615 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 1489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1615 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 2251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1489 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:54:13,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1615 Valid, 25 Invalid, 2251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1489 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:54:13,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-01-31 19:54:14,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 706. [2022-01-31 19:54:14,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 701 states have (on average 1.0042796005706134) internal successors, (704), 701 states have internal predecessors, (704), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 708 transitions. [2022-01-31 19:54:14,159 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 708 transitions. Word has length 699 [2022-01-31 19:54:14,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:54:14,160 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 708 transitions. [2022-01-31 19:54:14,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 118 states have (on average 2.059322033898305) internal successors, (243), 117 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:14,160 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 708 transitions. [2022-01-31 19:54:14,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 706 [2022-01-31 19:54:14,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:14,163 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:54:14,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 19:54:14,164 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:14,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:14,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1046875105, now seen corresponding path program 115 times [2022-01-31 19:54:14,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:14,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042625778] [2022-01-31 19:54:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:14,165 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:54:14,165 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:54:14,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:14,178 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:18,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:54:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:54:18,622 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:54:18,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042625778] [2022-01-31 19:54:18,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1042625778] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:54:18,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:54:18,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 19:54:18,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033721223] [2022-01-31 19:54:18,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:54:18,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 19:54:18,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:54:18,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 19:54:18,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6908, Invalid=7372, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 19:54:18,627 INFO L87 Difference]: Start difference. First operand 706 states and 708 transitions. Second operand has 120 states, 119 states have (on average 2.0588235294117645) internal successors, (245), 118 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:25,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:54:25,797 INFO L93 Difference]: Finished difference Result 1184 states and 1190 transitions. [2022-01-31 19:54:25,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 19:54:25,797 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 119 states have (on average 2.0588235294117645) internal successors, (245), 118 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 705 [2022-01-31 19:54:25,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:54:25,798 INFO L225 Difference]: With dead ends: 1184 [2022-01-31 19:54:25,798 INFO L226 Difference]: Without dead ends: 715 [2022-01-31 19:54:25,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6901 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=20948, Invalid=34984, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 19:54:25,801 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1626 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 1500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1626 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1500 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:54:25,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1626 Valid, 19 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1500 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:54:25,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-01-31 19:54:26,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 712. [2022-01-31 19:54:26,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 707 states have (on average 1.0042432814710043) internal successors, (710), 707 states have internal predecessors, (710), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:26,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 714 transitions. [2022-01-31 19:54:26,251 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 714 transitions. Word has length 705 [2022-01-31 19:54:26,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:54:26,252 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 714 transitions. [2022-01-31 19:54:26,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 119 states have (on average 2.0588235294117645) internal successors, (245), 118 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 714 transitions. [2022-01-31 19:54:26,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2022-01-31 19:54:26,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:26,255 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 116, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:54:26,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 19:54:26,255 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:26,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:26,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1012972059, now seen corresponding path program 116 times [2022-01-31 19:54:26,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:26,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151343804] [2022-01-31 19:54:26,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:26,257 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:54:26,257 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:54:26,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:26,270 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:30,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:54:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:30,317 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 19:54:30,317 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:54:30,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151343804] [2022-01-31 19:54:30,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1151343804] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:54:30,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:54:30,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 19:54:30,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034351993] [2022-01-31 19:54:30,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:54:30,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 19:54:30,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:54:30,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 19:54:30,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7026, Invalid=7494, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 19:54:30,325 INFO L87 Difference]: Start difference. First operand 712 states and 714 transitions. Second operand has 121 states, 120 states have (on average 2.058333333333333) internal successors, (247), 119 states have internal predecessors, (247), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:37,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:54:37,953 INFO L93 Difference]: Finished difference Result 1194 states and 1200 transitions. [2022-01-31 19:54:37,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 19:54:37,953 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 120 states have (on average 2.058333333333333) internal successors, (247), 119 states have internal predecessors, (247), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 711 [2022-01-31 19:54:37,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:54:37,954 INFO L225 Difference]: With dead ends: 1194 [2022-01-31 19:54:37,954 INFO L226 Difference]: Without dead ends: 721 [2022-01-31 19:54:37,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7019 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=21304, Invalid=35578, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 19:54:37,957 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1391 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 1260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1391 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 2054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1260 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:54:37,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1391 Valid, 29 Invalid, 2054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1260 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:54:37,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-01-31 19:54:38,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 718. [2022-01-31 19:54:38,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 713 states have (on average 1.0042075736325387) internal successors, (716), 713 states have internal predecessors, (716), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:38,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 720 transitions. [2022-01-31 19:54:38,372 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 720 transitions. Word has length 711 [2022-01-31 19:54:38,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:54:38,372 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 720 transitions. [2022-01-31 19:54:38,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 120 states have (on average 2.058333333333333) internal successors, (247), 119 states have internal predecessors, (247), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 720 transitions. [2022-01-31 19:54:38,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 718 [2022-01-31 19:54:38,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:38,375 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 117, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:54:38,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 19:54:38,376 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:38,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:38,376 INFO L85 PathProgramCache]: Analyzing trace with hash -348252971, now seen corresponding path program 117 times [2022-01-31 19:54:38,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:38,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876844654] [2022-01-31 19:54:38,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:38,377 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:54:38,377 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:54:38,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:38,390 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:42,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:54:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:54:42,207 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:54:42,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876844654] [2022-01-31 19:54:42,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1876844654] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:54:42,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:54:42,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 19:54:42,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211819541] [2022-01-31 19:54:42,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:54:42,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 19:54:42,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:54:42,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 19:54:42,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7145, Invalid=7617, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 19:54:42,211 INFO L87 Difference]: Start difference. First operand 718 states and 720 transitions. Second operand has 122 states, 121 states have (on average 2.0578512396694215) internal successors, (249), 120 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:49,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:54:49,725 INFO L93 Difference]: Finished difference Result 1204 states and 1210 transitions. [2022-01-31 19:54:49,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 19:54:49,725 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 121 states have (on average 2.0578512396694215) internal successors, (249), 120 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 717 [2022-01-31 19:54:49,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:54:49,726 INFO L225 Difference]: With dead ends: 1204 [2022-01-31 19:54:49,726 INFO L226 Difference]: Without dead ends: 727 [2022-01-31 19:54:49,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7138 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=21663, Invalid=36177, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 19:54:49,729 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1526 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 1397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 2177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1397 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:54:49,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1526 Valid, 25 Invalid, 2177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1397 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:54:49,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-01-31 19:54:50,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 724. [2022-01-31 19:54:50,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 719 states have (on average 1.004172461752434) internal successors, (722), 719 states have internal predecessors, (722), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:50,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 726 transitions. [2022-01-31 19:54:50,179 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 726 transitions. Word has length 717 [2022-01-31 19:54:50,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:54:50,179 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 726 transitions. [2022-01-31 19:54:50,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 121 states have (on average 2.0578512396694215) internal successors, (249), 120 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:50,179 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 726 transitions. [2022-01-31 19:54:50,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2022-01-31 19:54:50,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:50,183 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 118, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:54:50,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 19:54:50,183 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:50,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:50,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1333609457, now seen corresponding path program 118 times [2022-01-31 19:54:50,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:50,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414061377] [2022-01-31 19:54:50,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:50,184 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:54:50,184 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:54:50,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:50,198 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:54,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:54:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:54:54,650 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:54:54,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414061377] [2022-01-31 19:54:54,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [414061377] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:54:54,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:54:54,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 19:54:54,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832732765] [2022-01-31 19:54:54,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:54:54,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 19:54:54,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:54:54,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 19:54:54,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7265, Invalid=7741, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 19:54:54,653 INFO L87 Difference]: Start difference. First operand 724 states and 726 transitions. Second operand has 123 states, 122 states have (on average 2.057377049180328) internal successors, (251), 121 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:55:03,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:03,291 INFO L93 Difference]: Finished difference Result 1214 states and 1220 transitions. [2022-01-31 19:55:03,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 19:55:03,292 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 122 states have (on average 2.057377049180328) internal successors, (251), 121 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 723 [2022-01-31 19:55:03,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:03,293 INFO L225 Difference]: With dead ends: 1214 [2022-01-31 19:55:03,293 INFO L226 Difference]: Without dead ends: 733 [2022-01-31 19:55:03,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7258 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=22025, Invalid=36781, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 19:55:03,296 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1595 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 1464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1595 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 2260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1464 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:03,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1595 Valid, 27 Invalid, 2260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1464 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:55:03,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-01-31 19:55:03,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 730. [2022-01-31 19:55:03,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 725 states have (on average 1.0041379310344827) internal successors, (728), 725 states have internal predecessors, (728), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:55:03,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 732 transitions. [2022-01-31 19:55:03,724 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 732 transitions. Word has length 723 [2022-01-31 19:55:03,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:03,724 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 732 transitions. [2022-01-31 19:55:03,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 122 states have (on average 2.057377049180328) internal successors, (251), 121 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:55:03,724 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 732 transitions. [2022-01-31 19:55:03,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2022-01-31 19:55:03,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:03,728 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 119, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:03,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 19:55:03,728 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:03,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:03,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1178906679, now seen corresponding path program 119 times [2022-01-31 19:55:03,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:03,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596328894] [2022-01-31 19:55:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:03,735 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:55:03,735 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:55:03,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:03,748 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:07,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:55:07,562 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:07,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596328894] [2022-01-31 19:55:07,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [596328894] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:07,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:07,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 19:55:07,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135940665] [2022-01-31 19:55:07,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:07,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 19:55:07,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:07,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 19:55:07,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7386, Invalid=7866, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 19:55:07,577 INFO L87 Difference]: Start difference. First operand 730 states and 732 transitions. Second operand has 124 states, 123 states have (on average 2.0569105691056913) internal successors, (253), 122 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:55:15,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:15,807 INFO L93 Difference]: Finished difference Result 1224 states and 1230 transitions. [2022-01-31 19:55:15,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 19:55:15,807 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 123 states have (on average 2.0569105691056913) internal successors, (253), 122 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 729 [2022-01-31 19:55:15,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:15,809 INFO L225 Difference]: With dead ends: 1224 [2022-01-31 19:55:15,809 INFO L226 Difference]: Without dead ends: 739 [2022-01-31 19:55:15,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7379 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=22390, Invalid=37390, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 19:55:15,811 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1656 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 1524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1656 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 2286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1524 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:15,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1656 Valid, 19 Invalid, 2286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1524 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:55:15,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-01-31 19:55:16,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 736. [2022-01-31 19:55:16,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 731 states have (on average 1.0041039671682626) internal successors, (734), 731 states have internal predecessors, (734), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:55:16,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 738 transitions. [2022-01-31 19:55:16,258 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 738 transitions. Word has length 729 [2022-01-31 19:55:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:16,268 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 738 transitions. [2022-01-31 19:55:16,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 123 states have (on average 2.0569105691056913) internal successors, (253), 122 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:55:16,269 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 738 transitions. [2022-01-31 19:55:16,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2022-01-31 19:55:16,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:16,272 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:16,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 19:55:16,273 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:16,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:16,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1450995715, now seen corresponding path program 120 times [2022-01-31 19:55:16,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:16,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197925553] [2022-01-31 19:55:16,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:16,274 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:55:16,274 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:55:16,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:16,287 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:20,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:20,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:55:20,031 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:20,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197925553] [2022-01-31 19:55:20,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [197925553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:20,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:20,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 19:55:20,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776542761] [2022-01-31 19:55:20,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:20,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 19:55:20,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:20,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 19:55:20,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7508, Invalid=7992, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 19:55:20,035 INFO L87 Difference]: Start difference. First operand 736 states and 738 transitions. Second operand has 125 states, 124 states have (on average 2.056451612903226) internal successors, (255), 123 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:55:28,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:28,478 INFO L93 Difference]: Finished difference Result 1234 states and 1240 transitions. [2022-01-31 19:55:28,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 19:55:28,478 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 124 states have (on average 2.056451612903226) internal successors, (255), 123 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 735 [2022-01-31 19:55:28,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:28,479 INFO L225 Difference]: With dead ends: 1234 [2022-01-31 19:55:28,479 INFO L226 Difference]: Without dead ends: 745 [2022-01-31 19:55:28,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7501 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=22758, Invalid=38004, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 19:55:28,482 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1611 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 1478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1611 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 2286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1478 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:28,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1611 Valid, 27 Invalid, 2286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1478 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:55:28,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-01-31 19:55:28,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 742. [2022-01-31 19:55:28,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 737 states have (on average 1.0040705563093624) internal successors, (740), 737 states have internal predecessors, (740), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:55:28,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 744 transitions. [2022-01-31 19:55:28,925 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 744 transitions. Word has length 735 [2022-01-31 19:55:28,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:28,925 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 744 transitions. [2022-01-31 19:55:28,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 124 states have (on average 2.056451612903226) internal successors, (255), 123 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:55:28,925 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 744 transitions. [2022-01-31 19:55:28,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2022-01-31 19:55:28,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:28,939 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 121, 121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:28,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 19:55:28,939 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:28,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:28,939 INFO L85 PathProgramCache]: Analyzing trace with hash -765281091, now seen corresponding path program 121 times [2022-01-31 19:55:28,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:28,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035706280] [2022-01-31 19:55:28,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:28,940 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:55:28,940 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:55:28,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:28,954 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:33,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:33,220 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 19:55:33,220 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:33,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035706280] [2022-01-31 19:55:33,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2035706280] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:33,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:33,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 19:55:33,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435018938] [2022-01-31 19:55:33,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:33,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 19:55:33,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:33,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 19:55:33,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7631, Invalid=8119, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 19:55:33,222 INFO L87 Difference]: Start difference. First operand 742 states and 744 transitions. Second operand has 126 states, 125 states have (on average 2.056) internal successors, (257), 124 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:55:41,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:41,241 INFO L93 Difference]: Finished difference Result 1244 states and 1250 transitions. [2022-01-31 19:55:41,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 19:55:41,241 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 2.056) internal successors, (257), 124 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 741 [2022-01-31 19:55:41,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:41,242 INFO L225 Difference]: With dead ends: 1244 [2022-01-31 19:55:41,242 INFO L226 Difference]: Without dead ends: 751 [2022-01-31 19:55:41,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7624 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=23129, Invalid=38623, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 19:55:41,245 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1644 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 1507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 2311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1507 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:41,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1644 Valid, 25 Invalid, 2311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1507 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:55:41,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-01-31 19:55:41,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 748. [2022-01-31 19:55:41,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 743 states have (on average 1.0040376850605652) internal successors, (746), 743 states have internal predecessors, (746), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:55:41,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 750 transitions. [2022-01-31 19:55:41,698 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 750 transitions. Word has length 741 [2022-01-31 19:55:41,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:41,698 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 750 transitions. [2022-01-31 19:55:41,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 2.056) internal successors, (257), 124 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:55:41,698 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 750 transitions. [2022-01-31 19:55:41,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2022-01-31 19:55:41,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:41,702 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 122, 122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:41,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 19:55:41,702 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:41,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:41,703 INFO L85 PathProgramCache]: Analyzing trace with hash -820849161, now seen corresponding path program 122 times [2022-01-31 19:55:41,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:41,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524135121] [2022-01-31 19:55:41,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:41,704 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:55:41,704 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:55:41,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:41,718 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:45,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:45,604 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 19:55:45,604 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:45,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524135121] [2022-01-31 19:55:45,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1524135121] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:45,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:45,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 19:55:45,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686869761] [2022-01-31 19:55:45,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:45,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 19:55:45,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:45,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 19:55:45,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7755, Invalid=8247, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 19:55:45,608 INFO L87 Difference]: Start difference. First operand 748 states and 750 transitions. Second operand has 127 states, 126 states have (on average 2.0555555555555554) internal successors, (259), 125 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:55:54,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:54,172 INFO L93 Difference]: Finished difference Result 1254 states and 1260 transitions. [2022-01-31 19:55:54,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 19:55:54,173 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 126 states have (on average 2.0555555555555554) internal successors, (259), 125 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 747 [2022-01-31 19:55:54,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:54,174 INFO L225 Difference]: With dead ends: 1254 [2022-01-31 19:55:54,174 INFO L226 Difference]: Without dead ends: 757 [2022-01-31 19:55:54,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7748 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=23503, Invalid=39247, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 19:55:54,176 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1631 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 1494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1631 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1494 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:54,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1631 Valid, 31 Invalid, 2334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1494 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:55:54,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-01-31 19:55:54,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 754. [2022-01-31 19:55:54,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 749 states have (on average 1.0040053404539386) internal successors, (752), 749 states have internal predecessors, (752), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:55:54,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 756 transitions. [2022-01-31 19:55:54,646 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 756 transitions. Word has length 747 [2022-01-31 19:55:54,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:54,647 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 756 transitions. [2022-01-31 19:55:54,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 126 states have (on average 2.0555555555555554) internal successors, (259), 125 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:55:54,647 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 756 transitions. [2022-01-31 19:55:54,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 754 [2022-01-31 19:55:54,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:54,650 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 123, 123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:54,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 19:55:54,651 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:54,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:54,651 INFO L85 PathProgramCache]: Analyzing trace with hash 507075505, now seen corresponding path program 123 times [2022-01-31 19:55:54,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:54,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905952516] [2022-01-31 19:55:54,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:54,652 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:55:54,652 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:55:54,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:54,666 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:58,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:55:58,925 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:58,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905952516] [2022-01-31 19:55:58,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1905952516] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:58,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:58,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 19:55:58,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404006964] [2022-01-31 19:55:58,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:58,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 19:55:58,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:58,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 19:55:58,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7880, Invalid=8376, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 19:55:58,929 INFO L87 Difference]: Start difference. First operand 754 states and 756 transitions. Second operand has 128 states, 127 states have (on average 2.0551181102362204) internal successors, (261), 126 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:07,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:07,637 INFO L93 Difference]: Finished difference Result 1264 states and 1270 transitions. [2022-01-31 19:56:07,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 19:56:07,637 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 127 states have (on average 2.0551181102362204) internal successors, (261), 126 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 753 [2022-01-31 19:56:07,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:07,638 INFO L225 Difference]: With dead ends: 1264 [2022-01-31 19:56:07,638 INFO L226 Difference]: Without dead ends: 763 [2022-01-31 19:56:07,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7873 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=23880, Invalid=39876, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 19:56:07,641 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1504 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 1368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1504 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1368 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:07,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1504 Valid, 25 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1368 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:56:07,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-01-31 19:56:08,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 760. [2022-01-31 19:56:08,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 755 states have (on average 1.0039735099337748) internal successors, (758), 755 states have internal predecessors, (758), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:08,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 762 transitions. [2022-01-31 19:56:08,114 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 762 transitions. Word has length 753 [2022-01-31 19:56:08,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:08,114 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 762 transitions. [2022-01-31 19:56:08,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 127 states have (on average 2.0551181102362204) internal successors, (261), 126 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:08,114 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 762 transitions. [2022-01-31 19:56:08,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2022-01-31 19:56:08,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:08,118 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 124, 124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:08,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 19:56:08,118 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:08,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:08,118 INFO L85 PathProgramCache]: Analyzing trace with hash 462089707, now seen corresponding path program 124 times [2022-01-31 19:56:08,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:08,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006610410] [2022-01-31 19:56:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:08,119 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:08,119 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:56:08,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:08,135 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:12,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:12,548 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:12,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006610410] [2022-01-31 19:56:12,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1006610410] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:12,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:12,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 19:56:12,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420221219] [2022-01-31 19:56:12,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:12,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 19:56:12,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:12,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 19:56:12,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8006, Invalid=8506, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 19:56:12,552 INFO L87 Difference]: Start difference. First operand 760 states and 762 transitions. Second operand has 129 states, 128 states have (on average 2.0546875) internal successors, (263), 127 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:20,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:20,570 INFO L93 Difference]: Finished difference Result 1274 states and 1280 transitions. [2022-01-31 19:56:20,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 19:56:20,570 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 128 states have (on average 2.0546875) internal successors, (263), 127 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 759 [2022-01-31 19:56:20,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:20,571 INFO L225 Difference]: With dead ends: 1274 [2022-01-31 19:56:20,571 INFO L226 Difference]: Without dead ends: 769 [2022-01-31 19:56:20,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7999 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=24260, Invalid=40510, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 19:56:20,574 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1845 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 1710 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1845 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 2512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1710 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:20,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1845 Valid, 21 Invalid, 2512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1710 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:56:20,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-01-31 19:56:21,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 766. [2022-01-31 19:56:21,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 761 states have (on average 1.0039421813403417) internal successors, (764), 761 states have internal predecessors, (764), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:21,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 768 transitions. [2022-01-31 19:56:21,046 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 768 transitions. Word has length 759 [2022-01-31 19:56:21,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:21,046 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 768 transitions. [2022-01-31 19:56:21,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 128 states have (on average 2.0546875) internal successors, (263), 127 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:21,046 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 768 transitions. [2022-01-31 19:56:21,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 766 [2022-01-31 19:56:21,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:21,050 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 125, 125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:21,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 19:56:21,050 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:21,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:21,051 INFO L85 PathProgramCache]: Analyzing trace with hash -2033963867, now seen corresponding path program 125 times [2022-01-31 19:56:21,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:21,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521498368] [2022-01-31 19:56:21,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:21,052 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:21,052 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:56:21,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:21,066 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:26,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:26,100 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:26,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521498368] [2022-01-31 19:56:26,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1521498368] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:26,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:26,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 19:56:26,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450035347] [2022-01-31 19:56:26,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:26,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 19:56:26,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:26,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 19:56:26,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8133, Invalid=8637, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 19:56:26,104 INFO L87 Difference]: Start difference. First operand 766 states and 768 transitions. Second operand has 130 states, 129 states have (on average 2.054263565891473) internal successors, (265), 128 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:35,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:35,747 INFO L93 Difference]: Finished difference Result 1284 states and 1290 transitions. [2022-01-31 19:56:35,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 19:56:35,747 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 129 states have (on average 2.054263565891473) internal successors, (265), 128 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 765 [2022-01-31 19:56:35,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:35,748 INFO L225 Difference]: With dead ends: 1284 [2022-01-31 19:56:35,748 INFO L226 Difference]: Without dead ends: 775 [2022-01-31 19:56:35,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8126 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=24643, Invalid=41149, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 19:56:35,751 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1678 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 1541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1678 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 2369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1541 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:35,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1678 Valid, 25 Invalid, 2369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1541 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:56:35,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-01-31 19:56:36,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 772. [2022-01-31 19:56:36,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 767 states have (on average 1.0039113428943938) internal successors, (770), 767 states have internal predecessors, (770), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:36,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 774 transitions. [2022-01-31 19:56:36,231 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 774 transitions. Word has length 765 [2022-01-31 19:56:36,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:36,231 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 774 transitions. [2022-01-31 19:56:36,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 129 states have (on average 2.054263565891473) internal successors, (265), 128 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 774 transitions. [2022-01-31 19:56:36,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2022-01-31 19:56:36,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:36,235 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:36,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 19:56:36,235 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:36,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:36,236 INFO L85 PathProgramCache]: Analyzing trace with hash -576079905, now seen corresponding path program 126 times [2022-01-31 19:56:36,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:36,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956326972] [2022-01-31 19:56:36,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:36,237 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:36,237 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:56:36,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:36,251 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:40,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:40,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:40,298 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:40,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956326972] [2022-01-31 19:56:40,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1956326972] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:40,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:40,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 19:56:40,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242518928] [2022-01-31 19:56:40,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:40,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 19:56:40,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:40,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 19:56:40,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8261, Invalid=8769, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 19:56:40,319 INFO L87 Difference]: Start difference. First operand 772 states and 774 transitions. Second operand has 131 states, 130 states have (on average 2.0538461538461537) internal successors, (267), 129 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:49,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:49,502 INFO L93 Difference]: Finished difference Result 1294 states and 1300 transitions. [2022-01-31 19:56:49,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 19:56:49,503 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 130 states have (on average 2.0538461538461537) internal successors, (267), 129 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 771 [2022-01-31 19:56:49,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:49,520 INFO L225 Difference]: With dead ends: 1294 [2022-01-31 19:56:49,520 INFO L226 Difference]: Without dead ends: 781 [2022-01-31 19:56:49,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8254 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=25029, Invalid=41793, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 19:56:49,524 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1861 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 1724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1861 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 2528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1724 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:49,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1861 Valid, 19 Invalid, 2528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1724 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:56:49,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-01-31 19:56:50,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 778. [2022-01-31 19:56:50,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 773 states have (on average 1.0038809831824063) internal successors, (776), 773 states have internal predecessors, (776), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:50,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 780 transitions. [2022-01-31 19:56:50,234 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 780 transitions. Word has length 771 [2022-01-31 19:56:50,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:50,234 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 780 transitions. [2022-01-31 19:56:50,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 130 states have (on average 2.0538461538461537) internal successors, (267), 129 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:50,234 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 780 transitions. [2022-01-31 19:56:50,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2022-01-31 19:56:50,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:50,238 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 127, 127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:50,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 19:56:50,238 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:50,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:50,239 INFO L85 PathProgramCache]: Analyzing trace with hash 906506137, now seen corresponding path program 127 times [2022-01-31 19:56:50,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:50,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11128707] [2022-01-31 19:56:50,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:50,240 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:50,240 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:56:50,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:50,254 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:54,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:54,979 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 19:56:54,979 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:54,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11128707] [2022-01-31 19:56:54,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [11128707] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:54,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:54,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 19:56:54,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202688275] [2022-01-31 19:56:54,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:54,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 19:56:54,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:54,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 19:56:54,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8390, Invalid=8902, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 19:56:54,983 INFO L87 Difference]: Start difference. First operand 778 states and 780 transitions. Second operand has 132 states, 131 states have (on average 2.053435114503817) internal successors, (269), 130 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:04,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:04,426 INFO L93 Difference]: Finished difference Result 1304 states and 1310 transitions. [2022-01-31 19:57:04,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 19:57:04,427 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 131 states have (on average 2.053435114503817) internal successors, (269), 130 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 777 [2022-01-31 19:57:04,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:04,428 INFO L225 Difference]: With dead ends: 1304 [2022-01-31 19:57:04,428 INFO L226 Difference]: Without dead ends: 787 [2022-01-31 19:57:04,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8383 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=25418, Invalid=42442, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 19:57:04,431 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1776 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 1638 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1776 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 2458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1638 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:04,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1776 Valid, 21 Invalid, 2458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1638 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:57:04,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-01-31 19:57:04,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 784. [2022-01-31 19:57:04,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 779 states have (on average 1.0038510911424903) internal successors, (782), 779 states have internal predecessors, (782), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:04,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 786 transitions. [2022-01-31 19:57:04,951 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 786 transitions. Word has length 777 [2022-01-31 19:57:04,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:04,951 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 786 transitions. [2022-01-31 19:57:04,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 131 states have (on average 2.053435114503817) internal successors, (269), 130 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:04,951 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 786 transitions. [2022-01-31 19:57:04,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2022-01-31 19:57:04,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:04,955 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:04,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 19:57:04,956 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:04,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:04,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1749797933, now seen corresponding path program 128 times [2022-01-31 19:57:04,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:04,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28700076] [2022-01-31 19:57:04,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:04,957 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:04,957 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:04,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:04,972 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:10,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:10,078 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:10,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28700076] [2022-01-31 19:57:10,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [28700076] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:10,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:10,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 19:57:10,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374265115] [2022-01-31 19:57:10,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:10,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 19:57:10,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:10,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 19:57:10,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8520, Invalid=9036, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 19:57:10,081 INFO L87 Difference]: Start difference. First operand 784 states and 786 transitions. Second operand has 133 states, 132 states have (on average 2.053030303030303) internal successors, (271), 131 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:19,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:19,908 INFO L93 Difference]: Finished difference Result 1314 states and 1320 transitions. [2022-01-31 19:57:19,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 19:57:19,908 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 132 states have (on average 2.053030303030303) internal successors, (271), 131 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 783 [2022-01-31 19:57:19,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:19,909 INFO L225 Difference]: With dead ends: 1314 [2022-01-31 19:57:19,909 INFO L226 Difference]: Without dead ends: 793 [2022-01-31 19:57:19,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8513 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=25810, Invalid=43096, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 19:57:19,912 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2061 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 1919 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2061 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 2785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1919 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:19,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2061 Valid, 29 Invalid, 2785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1919 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:57:19,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-01-31 19:57:20,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 790. [2022-01-31 19:57:20,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 785 states have (on average 1.0038216560509554) internal successors, (788), 785 states have internal predecessors, (788), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:20,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 792 transitions. [2022-01-31 19:57:20,416 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 792 transitions. Word has length 783 [2022-01-31 19:57:20,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:20,416 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 792 transitions. [2022-01-31 19:57:20,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 132 states have (on average 2.053030303030303) internal successors, (271), 131 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:20,417 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 792 transitions. [2022-01-31 19:57:20,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2022-01-31 19:57:20,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:20,421 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 129, 129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:20,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 19:57:20,421 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:20,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:20,421 INFO L85 PathProgramCache]: Analyzing trace with hash -695573363, now seen corresponding path program 129 times [2022-01-31 19:57:20,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:20,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037786050] [2022-01-31 19:57:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:20,422 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:20,423 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:20,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:20,437 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:24,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:24,797 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 19:57:24,797 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:24,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037786050] [2022-01-31 19:57:24,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2037786050] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:24,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:24,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 19:57:24,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771405114] [2022-01-31 19:57:24,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:24,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 19:57:24,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:24,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 19:57:24,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8651, Invalid=9171, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 19:57:24,800 INFO L87 Difference]: Start difference. First operand 790 states and 792 transitions. Second operand has 134 states, 133 states have (on average 2.0526315789473686) internal successors, (273), 132 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:35,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:35,412 INFO L93 Difference]: Finished difference Result 1324 states and 1330 transitions. [2022-01-31 19:57:35,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 19:57:35,412 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 133 states have (on average 2.0526315789473686) internal successors, (273), 132 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 789 [2022-01-31 19:57:35,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:35,413 INFO L225 Difference]: With dead ends: 1324 [2022-01-31 19:57:35,413 INFO L226 Difference]: Without dead ends: 799 [2022-01-31 19:57:35,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8644 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=26205, Invalid=43755, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 19:57:35,416 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2088 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 1947 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2088 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 2779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1947 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:35,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2088 Valid, 21 Invalid, 2779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1947 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 19:57:35,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-01-31 19:57:35,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 796. [2022-01-31 19:57:35,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 791 states have (on average 1.0037926675094817) internal successors, (794), 791 states have internal predecessors, (794), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 798 transitions. [2022-01-31 19:57:35,944 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 798 transitions. Word has length 789 [2022-01-31 19:57:35,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:35,944 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 798 transitions. [2022-01-31 19:57:35,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 133 states have (on average 2.0526315789473686) internal successors, (273), 132 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:35,945 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 798 transitions. [2022-01-31 19:57:35,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2022-01-31 19:57:35,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:35,950 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:35,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 19:57:35,950 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:35,950 INFO L85 PathProgramCache]: Analyzing trace with hash -328244793, now seen corresponding path program 130 times [2022-01-31 19:57:35,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:35,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802206455] [2022-01-31 19:57:35,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:35,952 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:35,952 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:35,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:35,969 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:40,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:40,470 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 19:57:40,470 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:40,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802206455] [2022-01-31 19:57:40,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1802206455] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:40,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:40,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 19:57:40,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475517443] [2022-01-31 19:57:40,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:40,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 19:57:40,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:40,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 19:57:40,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8783, Invalid=9307, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 19:57:40,474 INFO L87 Difference]: Start difference. First operand 796 states and 798 transitions. Second operand has 135 states, 134 states have (on average 2.0522388059701493) internal successors, (275), 133 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:51,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:51,523 INFO L93 Difference]: Finished difference Result 1334 states and 1340 transitions. [2022-01-31 19:57:51,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 19:57:51,524 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 134 states have (on average 2.0522388059701493) internal successors, (275), 133 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 795 [2022-01-31 19:57:51,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:51,525 INFO L225 Difference]: With dead ends: 1334 [2022-01-31 19:57:51,525 INFO L226 Difference]: Without dead ends: 805 [2022-01-31 19:57:51,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8776 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=26603, Invalid=44419, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 19:57:51,528 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2147 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 2003 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2147 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 2841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2003 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:51,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2147 Valid, 21 Invalid, 2841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2003 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 19:57:51,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-01-31 19:57:52,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 802. [2022-01-31 19:57:52,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 797 states have (on average 1.0037641154328734) internal successors, (800), 797 states have internal predecessors, (800), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:52,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 804 transitions. [2022-01-31 19:57:52,050 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 804 transitions. Word has length 795 [2022-01-31 19:57:52,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:52,051 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 804 transitions. [2022-01-31 19:57:52,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 134 states have (on average 2.0522388059701493) internal successors, (275), 133 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:52,051 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 804 transitions. [2022-01-31 19:57:52,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2022-01-31 19:57:52,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:52,055 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 131, 131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:52,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 19:57:52,055 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:52,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:52,055 INFO L85 PathProgramCache]: Analyzing trace with hash -749745279, now seen corresponding path program 131 times [2022-01-31 19:57:52,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:52,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127690834] [2022-01-31 19:57:52,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:52,057 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:52,057 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:52,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:52,072 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:57,675 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:57,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127690834] [2022-01-31 19:57:57,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [127690834] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:57,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:57,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 19:57:57,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186760028] [2022-01-31 19:57:57,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:57,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 19:57:57,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:57,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 19:57:57,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8916, Invalid=9444, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 19:57:57,679 INFO L87 Difference]: Start difference. First operand 802 states and 804 transitions. Second operand has 136 states, 135 states have (on average 2.051851851851852) internal successors, (277), 134 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:07,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:07,693 INFO L93 Difference]: Finished difference Result 1344 states and 1350 transitions. [2022-01-31 19:58:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 19:58:07,693 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 135 states have (on average 2.051851851851852) internal successors, (277), 134 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 801 [2022-01-31 19:58:07,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:07,716 INFO L225 Difference]: With dead ends: 1344 [2022-01-31 19:58:07,716 INFO L226 Difference]: Without dead ends: 811 [2022-01-31 19:58:07,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8909 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=27004, Invalid=45088, Unknown=0, NotChecked=0, Total=72092 [2022-01-31 19:58:07,719 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1874 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 1731 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1874 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1731 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:07,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1874 Valid, 27 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1731 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:58:07,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-01-31 19:58:08,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 808. [2022-01-31 19:58:08,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 803 states have (on average 1.00373599003736) internal successors, (806), 803 states have internal predecessors, (806), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:08,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 810 transitions. [2022-01-31 19:58:08,266 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 810 transitions. Word has length 801 [2022-01-31 19:58:08,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:08,266 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 810 transitions. [2022-01-31 19:58:08,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 135 states have (on average 2.051851851851852) internal successors, (277), 134 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:08,266 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 810 transitions. [2022-01-31 19:58:08,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2022-01-31 19:58:08,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:08,270 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 132, 132, 132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:08,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 19:58:08,271 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:08,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:08,271 INFO L85 PathProgramCache]: Analyzing trace with hash -551534149, now seen corresponding path program 132 times [2022-01-31 19:58:08,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:08,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741038115] [2022-01-31 19:58:08,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:08,272 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:08,272 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:08,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:08,287 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:13,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:13,549 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:13,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741038115] [2022-01-31 19:58:13,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1741038115] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:13,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:13,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 19:58:13,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004108085] [2022-01-31 19:58:13,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:13,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 19:58:13,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:13,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 19:58:13,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9050, Invalid=9582, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 19:58:13,553 INFO L87 Difference]: Start difference. First operand 808 states and 810 transitions. Second operand has 137 states, 136 states have (on average 2.051470588235294) internal successors, (279), 135 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:24,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:24,263 INFO L93 Difference]: Finished difference Result 1354 states and 1360 transitions. [2022-01-31 19:58:24,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 19:58:24,263 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 136 states have (on average 2.051470588235294) internal successors, (279), 135 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 807 [2022-01-31 19:58:24,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:24,264 INFO L225 Difference]: With dead ends: 1354 [2022-01-31 19:58:24,264 INFO L226 Difference]: Without dead ends: 817 [2022-01-31 19:58:24,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9043 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=27408, Invalid=45762, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 19:58:24,267 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1641 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 1495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1641 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1495 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:24,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1641 Valid, 31 Invalid, 2395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1495 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:58:24,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-01-31 19:58:24,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 814. [2022-01-31 19:58:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 809 states have (on average 1.003708281829419) internal successors, (812), 809 states have internal predecessors, (812), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 816 transitions. [2022-01-31 19:58:24,809 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 816 transitions. Word has length 807 [2022-01-31 19:58:24,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:24,810 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 816 transitions. [2022-01-31 19:58:24,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 136 states have (on average 2.051470588235294) internal successors, (279), 135 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 816 transitions. [2022-01-31 19:58:24,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 814 [2022-01-31 19:58:24,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:24,814 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 133, 133, 133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:24,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 19:58:24,814 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:24,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:24,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1747098507, now seen corresponding path program 133 times [2022-01-31 19:58:24,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:24,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730550775] [2022-01-31 19:58:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:24,816 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:24,817 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:24,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:24,840 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:31,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:31,083 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:31,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730550775] [2022-01-31 19:58:31,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1730550775] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:31,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:31,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 19:58:31,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748503799] [2022-01-31 19:58:31,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:31,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 19:58:31,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:31,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 19:58:31,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9185, Invalid=9721, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 19:58:31,086 INFO L87 Difference]: Start difference. First operand 814 states and 816 transitions. Second operand has 138 states, 137 states have (on average 2.051094890510949) internal successors, (281), 136 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:42,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:42,517 INFO L93 Difference]: Finished difference Result 1364 states and 1370 transitions. [2022-01-31 19:58:42,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 19:58:42,517 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 137 states have (on average 2.051094890510949) internal successors, (281), 136 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 813 [2022-01-31 19:58:42,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:42,518 INFO L225 Difference]: With dead ends: 1364 [2022-01-31 19:58:42,518 INFO L226 Difference]: Without dead ends: 823 [2022-01-31 19:58:42,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9178 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=27815, Invalid=46441, Unknown=0, NotChecked=0, Total=74256 [2022-01-31 19:58:42,521 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1774 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 1630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1774 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 2506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1630 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:42,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1774 Valid, 25 Invalid, 2506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1630 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:58:42,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-01-31 19:58:43,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 820. [2022-01-31 19:58:43,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 815 states have (on average 1.003680981595092) internal successors, (818), 815 states have internal predecessors, (818), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:43,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 822 transitions. [2022-01-31 19:58:43,066 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 822 transitions. Word has length 813 [2022-01-31 19:58:43,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:43,067 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 822 transitions. [2022-01-31 19:58:43,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 137 states have (on average 2.051094890510949) internal successors, (281), 136 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:43,067 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 822 transitions. [2022-01-31 19:58:43,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2022-01-31 19:58:43,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:43,071 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 134, 134, 134, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:43,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 19:58:43,071 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:43,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:43,072 INFO L85 PathProgramCache]: Analyzing trace with hash 327930799, now seen corresponding path program 134 times [2022-01-31 19:58:43,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:43,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955341362] [2022-01-31 19:58:43,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:43,073 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:43,073 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:43,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:43,088 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:47,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:47,969 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:47,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955341362] [2022-01-31 19:58:47,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1955341362] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:47,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:47,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 19:58:47,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478897335] [2022-01-31 19:58:47,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:47,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 19:58:47,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:47,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 19:58:47,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9321, Invalid=9861, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 19:58:47,974 INFO L87 Difference]: Start difference. First operand 820 states and 822 transitions. Second operand has 139 states, 138 states have (on average 2.050724637681159) internal successors, (283), 137 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:59,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:59,161 INFO L93 Difference]: Finished difference Result 1374 states and 1380 transitions. [2022-01-31 19:58:59,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 19:58:59,162 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 138 states have (on average 2.050724637681159) internal successors, (283), 137 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 819 [2022-01-31 19:58:59,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:59,163 INFO L225 Difference]: With dead ends: 1374 [2022-01-31 19:58:59,163 INFO L226 Difference]: Without dead ends: 829 [2022-01-31 19:58:59,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9314 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=28225, Invalid=47125, Unknown=0, NotChecked=0, Total=75350 [2022-01-31 19:58:59,166 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2191 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 2042 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2191 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 2904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2042 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:59,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2191 Valid, 21 Invalid, 2904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2042 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 19:58:59,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-01-31 19:58:59,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 826. [2022-01-31 19:58:59,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 821 states have (on average 1.0036540803897687) internal successors, (824), 821 states have internal predecessors, (824), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:59,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 828 transitions. [2022-01-31 19:58:59,717 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 828 transitions. Word has length 819 [2022-01-31 19:58:59,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:59,717 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 828 transitions. [2022-01-31 19:58:59,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 138 states have (on average 2.050724637681159) internal successors, (283), 137 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:59,717 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 828 transitions. [2022-01-31 19:58:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2022-01-31 19:58:59,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:59,733 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 135, 135, 135, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:59,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 19:58:59,733 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:59,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:59,734 INFO L85 PathProgramCache]: Analyzing trace with hash -801624215, now seen corresponding path program 135 times [2022-01-31 19:58:59,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:59,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315395133] [2022-01-31 19:58:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:59,735 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:59,735 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:59,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:59,754 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:04,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:04,365 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:04,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315395133] [2022-01-31 19:59:04,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [315395133] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:04,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:04,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 19:59:04,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594383412] [2022-01-31 19:59:04,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:04,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 19:59:04,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:04,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 19:59:04,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9458, Invalid=10002, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 19:59:04,369 INFO L87 Difference]: Start difference. First operand 826 states and 828 transitions. Second operand has 140 states, 139 states have (on average 2.050359712230216) internal successors, (285), 138 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:14,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:14,648 INFO L93 Difference]: Finished difference Result 1384 states and 1390 transitions. [2022-01-31 19:59:14,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-31 19:59:14,648 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 139 states have (on average 2.050359712230216) internal successors, (285), 138 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 825 [2022-01-31 19:59:14,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:14,649 INFO L225 Difference]: With dead ends: 1384 [2022-01-31 19:59:14,649 INFO L226 Difference]: Without dead ends: 835 [2022-01-31 19:59:14,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9451 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=28638, Invalid=47814, Unknown=0, NotChecked=0, Total=76452 [2022-01-31 19:59:14,652 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1972 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 1825 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1972 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 2683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1825 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:14,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1972 Valid, 19 Invalid, 2683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1825 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:59:14,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-01-31 19:59:15,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 832. [2022-01-31 19:59:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 827 states have (on average 1.003627569528416) internal successors, (830), 827 states have internal predecessors, (830), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:15,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 834 transitions. [2022-01-31 19:59:15,212 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 834 transitions. Word has length 825 [2022-01-31 19:59:15,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:15,212 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 834 transitions. [2022-01-31 19:59:15,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 139 states have (on average 2.050359712230216) internal successors, (285), 138 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:15,212 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 834 transitions. [2022-01-31 19:59:15,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2022-01-31 19:59:15,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:15,217 INFO L514 BasicCegarLoop]: trace histogram [136, 136, 136, 136, 136, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:15,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 19:59:15,217 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:15,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:15,217 INFO L85 PathProgramCache]: Analyzing trace with hash 234297251, now seen corresponding path program 136 times [2022-01-31 19:59:15,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:15,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107018562] [2022-01-31 19:59:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:15,218 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:15,218 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:59:15,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:15,237 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:21,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:21,041 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:21,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107018562] [2022-01-31 19:59:21,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2107018562] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:21,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:21,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 19:59:21,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362074928] [2022-01-31 19:59:21,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:21,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-01-31 19:59:21,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:21,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-01-31 19:59:21,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9596, Invalid=10144, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 19:59:21,045 INFO L87 Difference]: Start difference. First operand 832 states and 834 transitions. Second operand has 141 states, 140 states have (on average 2.05) internal successors, (287), 139 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:32,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:32,217 INFO L93 Difference]: Finished difference Result 1394 states and 1400 transitions. [2022-01-31 19:59:32,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-31 19:59:32,217 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 140 states have (on average 2.05) internal successors, (287), 139 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 831 [2022-01-31 19:59:32,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:32,232 INFO L225 Difference]: With dead ends: 1394 [2022-01-31 19:59:32,232 INFO L226 Difference]: Without dead ends: 841 [2022-01-31 19:59:32,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9589 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=29054, Invalid=48508, Unknown=0, NotChecked=0, Total=77562 [2022-01-31 19:59:32,235 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1815 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 1664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1815 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 2578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1664 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:32,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1815 Valid, 29 Invalid, 2578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1664 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:59:32,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-01-31 19:59:32,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 838. [2022-01-31 19:59:32,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 833 states have (on average 1.0036014405762306) internal successors, (836), 833 states have internal predecessors, (836), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:32,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 840 transitions. [2022-01-31 19:59:32,832 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 840 transitions. Word has length 831 [2022-01-31 19:59:32,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:32,833 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 840 transitions. [2022-01-31 19:59:32,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 140 states have (on average 2.05) internal successors, (287), 139 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:32,833 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 840 transitions. [2022-01-31 19:59:32,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 838 [2022-01-31 19:59:32,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:32,837 INFO L514 BasicCegarLoop]: trace histogram [137, 137, 137, 137, 137, 137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:32,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 19:59:32,838 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:32,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:32,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1461375907, now seen corresponding path program 137 times [2022-01-31 19:59:32,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:32,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853206768] [2022-01-31 19:59:32,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:32,839 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:32,839 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:59:32,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:32,861 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:33,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:38,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:38,360 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:38,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853206768] [2022-01-31 19:59:38,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [853206768] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:38,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:38,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-01-31 19:59:38,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842224662] [2022-01-31 19:59:38,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:38,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-01-31 19:59:38,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:38,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-01-31 19:59:38,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9735, Invalid=10287, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 19:59:38,365 INFO L87 Difference]: Start difference. First operand 838 states and 840 transitions. Second operand has 142 states, 141 states have (on average 2.049645390070922) internal successors, (289), 140 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:50,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:50,401 INFO L93 Difference]: Finished difference Result 1404 states and 1410 transitions. [2022-01-31 19:59:50,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-31 19:59:50,401 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 141 states have (on average 2.049645390070922) internal successors, (289), 140 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 837 [2022-01-31 19:59:50,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:50,403 INFO L225 Difference]: With dead ends: 1404 [2022-01-31 19:59:50,403 INFO L226 Difference]: Without dead ends: 847 [2022-01-31 19:59:50,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9728 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=29473, Invalid=49207, Unknown=0, NotChecked=0, Total=78680 [2022-01-31 19:59:50,406 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1916 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 1766 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1916 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 2656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1766 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:50,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1916 Valid, 23 Invalid, 2656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1766 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 19:59:50,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-01-31 19:59:51,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 844. [2022-01-31 19:59:51,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 839 states have (on average 1.0035756853396902) internal successors, (842), 839 states have internal predecessors, (842), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:51,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 846 transitions. [2022-01-31 19:59:51,002 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 846 transitions. Word has length 837 [2022-01-31 19:59:51,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:51,002 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 846 transitions. [2022-01-31 19:59:51,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 141 states have (on average 2.049645390070922) internal successors, (289), 140 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:51,002 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 846 transitions. [2022-01-31 19:59:51,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2022-01-31 19:59:51,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:51,007 INFO L514 BasicCegarLoop]: trace histogram [138, 138, 138, 138, 138, 138, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:51,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 19:59:51,007 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:51,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:51,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1931939223, now seen corresponding path program 138 times [2022-01-31 19:59:51,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:51,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560360944] [2022-01-31 19:59:51,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:51,009 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:51,009 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:59:51,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:51,028 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:55,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:55,952 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:55,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560360944] [2022-01-31 19:59:55,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [560360944] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:55,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:55,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-01-31 19:59:55,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456804890] [2022-01-31 19:59:55,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:55,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-01-31 19:59:55,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:55,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-01-31 19:59:55,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9875, Invalid=10431, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 19:59:55,956 INFO L87 Difference]: Start difference. First operand 844 states and 846 transitions. Second operand has 143 states, 142 states have (on average 2.0492957746478875) internal successors, (291), 141 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:07,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:07,229 INFO L93 Difference]: Finished difference Result 1414 states and 1420 transitions. [2022-01-31 20:00:07,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-31 20:00:07,229 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 142 states have (on average 2.0492957746478875) internal successors, (291), 141 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 843 [2022-01-31 20:00:07,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:07,230 INFO L225 Difference]: With dead ends: 1414 [2022-01-31 20:00:07,230 INFO L226 Difference]: Without dead ends: 853 [2022-01-31 20:00:07,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9868 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=29895, Invalid=49911, Unknown=0, NotChecked=0, Total=79806 [2022-01-31 20:00:07,233 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1843 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 1691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1843 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1691 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:07,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1843 Valid, 25 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1691 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:00:07,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-01-31 20:00:07,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 850. [2022-01-31 20:00:07,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 845 states have (on average 1.0035502958579883) internal successors, (848), 845 states have internal predecessors, (848), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:07,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 852 transitions. [2022-01-31 20:00:07,848 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 852 transitions. Word has length 843 [2022-01-31 20:00:07,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:07,848 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 852 transitions. [2022-01-31 20:00:07,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 142 states have (on average 2.0492957746478875) internal successors, (291), 141 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:07,848 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 852 transitions. [2022-01-31 20:00:07,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 850 [2022-01-31 20:00:07,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:07,853 INFO L514 BasicCegarLoop]: trace histogram [139, 139, 139, 139, 139, 139, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:07,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 20:00:07,853 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:07,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:07,853 INFO L85 PathProgramCache]: Analyzing trace with hash 250174289, now seen corresponding path program 139 times [2022-01-31 20:00:07,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:07,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81266134] [2022-01-31 20:00:07,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:07,854 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:07,854 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:00:07,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:07,873 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:13,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:13,685 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:13,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81266134] [2022-01-31 20:00:13,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [81266134] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:13,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:13,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-01-31 20:00:13,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477128039] [2022-01-31 20:00:13,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:13,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-01-31 20:00:13,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:13,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-01-31 20:00:13,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10016, Invalid=10576, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 20:00:13,689 INFO L87 Difference]: Start difference. First operand 850 states and 852 transitions. Second operand has 144 states, 143 states have (on average 2.0489510489510487) internal successors, (293), 142 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:25,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:25,728 INFO L93 Difference]: Finished difference Result 1424 states and 1430 transitions. [2022-01-31 20:00:25,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-31 20:00:25,728 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 143 states have (on average 2.0489510489510487) internal successors, (293), 142 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 849 [2022-01-31 20:00:25,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:25,729 INFO L225 Difference]: With dead ends: 1424 [2022-01-31 20:00:25,729 INFO L226 Difference]: Without dead ends: 859 [2022-01-31 20:00:25,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10009 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=30320, Invalid=50620, Unknown=0, NotChecked=0, Total=80940 [2022-01-31 20:00:25,732 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1806 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 1656 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1806 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 2568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1656 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:25,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1806 Valid, 25 Invalid, 2568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1656 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:00:25,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-01-31 20:00:26,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 856. [2022-01-31 20:00:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 851 states have (on average 1.0035252643948296) internal successors, (854), 851 states have internal predecessors, (854), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:26,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 858 transitions. [2022-01-31 20:00:26,353 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 858 transitions. Word has length 849 [2022-01-31 20:00:26,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:26,354 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 858 transitions. [2022-01-31 20:00:26,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 143 states have (on average 2.0489510489510487) internal successors, (293), 142 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:26,354 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 858 transitions. [2022-01-31 20:00:26,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2022-01-31 20:00:26,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:26,359 INFO L514 BasicCegarLoop]: trace histogram [140, 140, 140, 140, 140, 140, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:26,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-01-31 20:00:26,359 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:26,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:26,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1214297483, now seen corresponding path program 140 times [2022-01-31 20:00:26,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:26,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038212764] [2022-01-31 20:00:26,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:26,360 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:26,360 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:00:26,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:26,380 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat