/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-industry-pattern/array_ptr_single_elem_init-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 18:21:26,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 18:21:26,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 18:21:26,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 18:21:26,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 18:21:26,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 18:21:26,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 18:21:26,788 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 18:21:26,797 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 18:21:26,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 18:21:26,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 18:21:26,799 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 18:21:26,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 18:21:26,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 18:21:26,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 18:21:26,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 18:21:26,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 18:21:26,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 18:21:26,800 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 18:21:26,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 18:21:26,800 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 18:21:26,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 18:21:26,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 18:21:26,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 18:21:26,800 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 18:21:26,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 18:21:26,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:21:26,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 18:21:26,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 18:21:26,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 18:21:26,801 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 18:21:26,801 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 18:21:26,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 18:21:26,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 18:21:26,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 18:21:26,982 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 18:21:26,982 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 18:21:26,983 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i [2022-01-31 18:21:27,051 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/816e0c369/f4e400be516143a88ed66186cb3293ec/FLAGd49f4a768 [2022-01-31 18:21:27,397 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 18:21:27,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i [2022-01-31 18:21:27,401 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/816e0c369/f4e400be516143a88ed66186cb3293ec/FLAGd49f4a768 [2022-01-31 18:21:27,416 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/816e0c369/f4e400be516143a88ed66186cb3293ec [2022-01-31 18:21:27,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 18:21:27,418 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 18:21:27,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 18:21:27,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 18:21:27,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 18:21:27,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:21:27" (1/1) ... [2022-01-31 18:21:27,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25f2cb74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:21:27, skipping insertion in model container [2022-01-31 18:21:27,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:21:27" (1/1) ... [2022-01-31 18:21:27,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 18:21:27,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 18:21:27,551 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-industry-pattern/array_ptr_single_elem_init-2.i[821,834] [2022-01-31 18:21:27,559 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:21:27,563 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 18:21:27,572 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-industry-pattern/array_ptr_single_elem_init-2.i[821,834] [2022-01-31 18:21:27,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:21:27,584 INFO L208 MainTranslator]: Completed translation [2022-01-31 18:21:27,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:21:27 WrapperNode [2022-01-31 18:21:27,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 18:21:27,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 18:21:27,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 18:21:27,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 18:21:27,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:21:27" (1/1) ... [2022-01-31 18:21:27,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:21:27" (1/1) ... [2022-01-31 18:21:27,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:21:27" (1/1) ... [2022-01-31 18:21:27,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:21:27" (1/1) ... [2022-01-31 18:21:27,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:21:27" (1/1) ... [2022-01-31 18:21:27,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:21:27" (1/1) ... [2022-01-31 18:21:27,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:21:27" (1/1) ... [2022-01-31 18:21:27,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 18:21:27,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 18:21:27,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 18:21:27,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 18:21:27,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:21:27" (1/1) ... [2022-01-31 18:21:27,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:21:27,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 18:21:27,630 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 18:21:27,635 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 18:21:27,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 18:21:27,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 18:21:27,654 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 18:21:27,654 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 18:21:27,654 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 18:21:27,654 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 18:21:27,654 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 18:21:27,654 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 18:21:27,655 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 18:21:27,655 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 18:21:27,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 18:21:27,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 18:21:27,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 18:21:27,655 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 18:21:27,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 18:21:27,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 18:21:27,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 18:21:27,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 18:21:27,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 18:21:27,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 18:21:27,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 18:21:27,709 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 18:21:27,711 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 18:21:27,798 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 18:21:27,806 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 18:21:27,806 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 18:21:27,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:21:27 BoogieIcfgContainer [2022-01-31 18:21:27,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 18:21:27,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 18:21:27,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 18:21:27,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 18:21:27,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 06:21:27" (1/3) ... [2022-01-31 18:21:27,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fdc24ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:21:27, skipping insertion in model container [2022-01-31 18:21:27,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:21:27" (2/3) ... [2022-01-31 18:21:27,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fdc24ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:21:27, skipping insertion in model container [2022-01-31 18:21:27,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:21:27" (3/3) ... [2022-01-31 18:21:27,826 INFO L111 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-2.i [2022-01-31 18:21:27,829 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 18:21:27,829 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 18:21:27,875 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 18:21:27,884 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 18:21:27,884 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 18:21:27,895 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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 18:21:27,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 18:21:27,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:27,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:27,900 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:27,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:27,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1729551954, now seen corresponding path program 1 times [2022-01-31 18:21:27,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:27,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169543421] [2022-01-31 18:21:27,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:27,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:27,957 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:28,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:28,083 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 18:21:28,084 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:28,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169543421] [2022-01-31 18:21:28,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [169543421] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:28,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:28,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 18:21:28,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111282885] [2022-01-31 18:21:28,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:28,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 18:21:28,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:28,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 18:21:28,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 18:21:28,114 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:28,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:28,146 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-01-31 18:21:28,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 18:21:28,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 18:21:28,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:28,155 INFO L225 Difference]: With dead ends: 46 [2022-01-31 18:21:28,156 INFO L226 Difference]: Without dead ends: 24 [2022-01-31 18:21:28,158 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 18:21:28,165 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:28,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 36 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:21:28,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-31 18:21:28,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-31 18:21:28,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-01-31 18:21:28,196 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 14 [2022-01-31 18:21:28,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:28,197 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-01-31 18:21:28,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:28,197 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-01-31 18:21:28,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 18:21:28,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:28,198 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:28,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 18:21:28,198 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:28,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:28,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1443190422, now seen corresponding path program 1 times [2022-01-31 18:21:28,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:28,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185378985] [2022-01-31 18:21:28,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:28,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:28,201 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:28,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:28,246 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:28,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185378985] [2022-01-31 18:21:28,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [185378985] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:28,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:28,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 18:21:28,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566707973] [2022-01-31 18:21:28,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:28,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 18:21:28,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:28,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 18:21:28,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 18:21:28,248 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:28,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:28,327 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-01-31 18:21:28,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 18:21:28,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 18:21:28,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:28,328 INFO L225 Difference]: With dead ends: 45 [2022-01-31 18:21:28,328 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 18:21:28,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:21:28,330 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:28,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 25 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:21:28,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 18:21:28,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2022-01-31 18:21:28,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:28,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-01-31 18:21:28,336 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2022-01-31 18:21:28,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:28,336 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-01-31 18:21:28,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:28,336 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-01-31 18:21:28,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 18:21:28,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:28,337 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:28,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 18:21:28,337 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:28,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:28,338 INFO L85 PathProgramCache]: Analyzing trace with hash 749519378, now seen corresponding path program 1 times [2022-01-31 18:21:28,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:28,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110905161] [2022-01-31 18:21:28,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:28,356 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:28,357 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:28,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:28,359 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:28,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:28,428 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:28,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110905161] [2022-01-31 18:21:28,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1110905161] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:28,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:28,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 18:21:28,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94736030] [2022-01-31 18:21:28,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:28,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 18:21:28,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:28,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 18:21:28,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:21:28,430 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:28,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:28,554 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2022-01-31 18:21:28,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 18:21:28,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 18:21:28,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:28,557 INFO L225 Difference]: With dead ends: 56 [2022-01-31 18:21:28,557 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 18:21:28,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:21:28,560 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 68 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:28,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 25 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:21:28,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 18:21:28,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-01-31 18:21:28,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:28,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-01-31 18:21:28,570 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 22 [2022-01-31 18:21:28,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:28,571 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-01-31 18:21:28,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:28,571 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-01-31 18:21:28,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 18:21:28,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:28,572 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:28,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 18:21:28,572 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:28,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:28,573 INFO L85 PathProgramCache]: Analyzing trace with hash -9027222, now seen corresponding path program 2 times [2022-01-31 18:21:28,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:28,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97956516] [2022-01-31 18:21:28,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:28,578 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:28,579 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:28,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:28,580 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:28,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:28,667 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:28,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97956516] [2022-01-31 18:21:28,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [97956516] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:28,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:28,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 18:21:28,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75035357] [2022-01-31 18:21:28,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:28,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 18:21:28,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:28,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 18:21:28,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 18:21:28,669 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:28,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:28,777 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-01-31 18:21:28,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 18:21:28,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 18:21:28,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:28,780 INFO L225 Difference]: With dead ends: 68 [2022-01-31 18:21:28,780 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 18:21:28,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 18:21:28,787 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 100 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:28,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 25 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:21:28,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 18:21:28,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2022-01-31 18:21:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:28,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-01-31 18:21:28,801 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 30 [2022-01-31 18:21:28,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:28,802 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-01-31 18:21:28,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:28,802 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-01-31 18:21:28,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 18:21:28,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:28,803 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:28,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 18:21:28,803 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:28,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:28,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2083363858, now seen corresponding path program 3 times [2022-01-31 18:21:28,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:28,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247022510] [2022-01-31 18:21:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:28,807 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:28,808 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:28,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:28,810 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:28,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:28,893 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:28,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247022510] [2022-01-31 18:21:28,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [247022510] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:28,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:28,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 18:21:28,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279637132] [2022-01-31 18:21:28,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:28,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 18:21:28,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:28,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 18:21:28,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:21:28,895 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:29,026 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2022-01-31 18:21:29,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 18:21:29,027 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 18:21:29,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:29,031 INFO L225 Difference]: With dead ends: 80 [2022-01-31 18:21:29,031 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 18:21:29,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 18:21:29,043 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:29,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 30 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:21:29,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 18:21:29,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-01-31 18:21:29,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.3125) internal successors, (63), 48 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:29,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2022-01-31 18:21:29,053 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 38 [2022-01-31 18:21:29,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:29,053 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2022-01-31 18:21:29,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:29,053 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2022-01-31 18:21:29,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 18:21:29,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:29,054 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:29,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 18:21:29,054 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:29,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:29,055 INFO L85 PathProgramCache]: Analyzing trace with hash 2134940010, now seen corresponding path program 4 times [2022-01-31 18:21:29,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:29,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823851132] [2022-01-31 18:21:29,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:29,058 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:29,058 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:29,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:29,062 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:29,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:29,164 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:29,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823851132] [2022-01-31 18:21:29,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1823851132] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:29,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:29,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 18:21:29,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620868041] [2022-01-31 18:21:29,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:29,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 18:21:29,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:29,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 18:21:29,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 18:21:29,167 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:29,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:29,313 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2022-01-31 18:21:29,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 18:21:29,313 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 18:21:29,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:29,314 INFO L225 Difference]: With dead ends: 92 [2022-01-31 18:21:29,314 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 18:21:29,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 18:21:29,315 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 133 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:29,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 35 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:21:29,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 18:21:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2022-01-31 18:21:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 57 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2022-01-31 18:21:29,334 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 46 [2022-01-31 18:21:29,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:29,336 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2022-01-31 18:21:29,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:29,336 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2022-01-31 18:21:29,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 18:21:29,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:29,342 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:29,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 18:21:29,343 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:29,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:29,344 INFO L85 PathProgramCache]: Analyzing trace with hash -322718190, now seen corresponding path program 5 times [2022-01-31 18:21:29,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:29,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193420986] [2022-01-31 18:21:29,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:29,352 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:29,352 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:29,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:29,354 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:29,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:29,466 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:29,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193420986] [2022-01-31 18:21:29,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1193420986] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:29,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:29,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 18:21:29,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632834779] [2022-01-31 18:21:29,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:29,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 18:21:29,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:29,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 18:21:29,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 18:21:29,467 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:29,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:29,627 INFO L93 Difference]: Finished difference Result 104 states and 130 transitions. [2022-01-31 18:21:29,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 18:21:29,628 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 18:21:29,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:29,629 INFO L225 Difference]: With dead ends: 104 [2022-01-31 18:21:29,629 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 18:21:29,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 18:21:29,630 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:29,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 25 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:21:29,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 18:21:29,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2022-01-31 18:21:29,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 66 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:29,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2022-01-31 18:21:29,639 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 54 [2022-01-31 18:21:29,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:29,639 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2022-01-31 18:21:29,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:29,639 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2022-01-31 18:21:29,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 18:21:29,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:29,640 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:29,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 18:21:29,640 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:29,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:29,640 INFO L85 PathProgramCache]: Analyzing trace with hash 164213098, now seen corresponding path program 6 times [2022-01-31 18:21:29,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:29,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200148909] [2022-01-31 18:21:29,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:29,643 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:29,644 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:29,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:29,645 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:29,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:29,743 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:29,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200148909] [2022-01-31 18:21:29,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1200148909] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:29,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:29,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 18:21:29,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721384299] [2022-01-31 18:21:29,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:29,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 18:21:29,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:29,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 18:21:29,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 18:21:29,746 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:29,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:29,929 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2022-01-31 18:21:29,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 18:21:29,930 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 18:21:29,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:29,930 INFO L225 Difference]: With dead ends: 116 [2022-01-31 18:21:29,930 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 18:21:29,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-31 18:21:29,931 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 219 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:29,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 30 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:21:29,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 18:21:29,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2022-01-31 18:21:29,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 75 states have (on average 1.32) internal successors, (99), 75 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:29,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2022-01-31 18:21:29,940 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 62 [2022-01-31 18:21:29,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:29,940 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2022-01-31 18:21:29,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:29,940 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2022-01-31 18:21:29,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 18:21:29,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:29,941 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:29,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 18:21:29,941 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:29,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:29,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1342115858, now seen corresponding path program 7 times [2022-01-31 18:21:29,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:29,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851713349] [2022-01-31 18:21:29,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:29,945 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:29,945 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:29,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:29,947 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:30,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:30,054 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:30,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851713349] [2022-01-31 18:21:30,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1851713349] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:30,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:30,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 18:21:30,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661296447] [2022-01-31 18:21:30,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:30,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 18:21:30,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:30,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 18:21:30,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 18:21:30,056 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:30,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:30,236 INFO L93 Difference]: Finished difference Result 128 states and 160 transitions. [2022-01-31 18:21:30,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 18:21:30,237 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 18:21:30,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:30,238 INFO L225 Difference]: With dead ends: 128 [2022-01-31 18:21:30,238 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 18:21:30,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 18:21:30,240 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 318 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:30,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 25 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:21:30,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 18:21:30,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2022-01-31 18:21:30,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.3214285714285714) internal successors, (111), 84 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:30,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 116 transitions. [2022-01-31 18:21:30,255 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 116 transitions. Word has length 70 [2022-01-31 18:21:30,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:30,255 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 116 transitions. [2022-01-31 18:21:30,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:30,255 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 116 transitions. [2022-01-31 18:21:30,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 18:21:30,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:30,256 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:30,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 18:21:30,256 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:30,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:30,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1803651434, now seen corresponding path program 8 times [2022-01-31 18:21:30,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:30,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783743759] [2022-01-31 18:21:30,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:30,260 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:30,260 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:30,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:30,262 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:30,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:30,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:30,361 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:30,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783743759] [2022-01-31 18:21:30,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1783743759] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:30,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:30,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 18:21:30,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187852877] [2022-01-31 18:21:30,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:30,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 18:21:30,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:30,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 18:21:30,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 18:21:30,363 INFO L87 Difference]: Start difference. First operand 90 states and 116 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:30,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:30,578 INFO L93 Difference]: Finished difference Result 140 states and 175 transitions. [2022-01-31 18:21:30,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 18:21:30,578 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 18:21:30,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:30,580 INFO L225 Difference]: With dead ends: 140 [2022-01-31 18:21:30,580 INFO L226 Difference]: Without dead ends: 105 [2022-01-31 18:21:30,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-01-31 18:21:30,581 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 345 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:30,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 25 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:21:30,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-31 18:21:30,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2022-01-31 18:21:30,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 93 states have (on average 1.3225806451612903) internal successors, (123), 93 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 128 transitions. [2022-01-31 18:21:30,592 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 128 transitions. Word has length 78 [2022-01-31 18:21:30,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:30,592 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 128 transitions. [2022-01-31 18:21:30,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:30,593 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 128 transitions. [2022-01-31 18:21:30,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 18:21:30,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:30,593 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:30,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 18:21:30,593 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:30,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:30,594 INFO L85 PathProgramCache]: Analyzing trace with hash 191867410, now seen corresponding path program 9 times [2022-01-31 18:21:30,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:30,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384084120] [2022-01-31 18:21:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:30,597 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:30,597 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:30,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:30,598 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:30,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:30,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:30,691 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:30,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384084120] [2022-01-31 18:21:30,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1384084120] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:30,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:30,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 18:21:30,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135170885] [2022-01-31 18:21:30,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:30,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 18:21:30,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:30,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 18:21:30,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 18:21:30,693 INFO L87 Difference]: Start difference. First operand 99 states and 128 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:30,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:30,911 INFO L93 Difference]: Finished difference Result 152 states and 190 transitions. [2022-01-31 18:21:30,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 18:21:30,911 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-01-31 18:21:30,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:30,912 INFO L225 Difference]: With dead ends: 152 [2022-01-31 18:21:30,912 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 18:21:30,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-01-31 18:21:30,913 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 324 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:30,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 30 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:21:30,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 18:21:30,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2022-01-31 18:21:30,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.3235294117647058) internal successors, (135), 102 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:30,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2022-01-31 18:21:30,922 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 86 [2022-01-31 18:21:30,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:30,922 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2022-01-31 18:21:30,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:30,922 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2022-01-31 18:21:30,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 18:21:30,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:30,923 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:30,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 18:21:30,923 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:30,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:30,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1557668202, now seen corresponding path program 10 times [2022-01-31 18:21:30,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:30,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371817338] [2022-01-31 18:21:30,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:30,926 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:30,926 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:30,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:30,928 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:31,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:31,031 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 18:21:31,031 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:31,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371817338] [2022-01-31 18:21:31,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [371817338] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:31,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:31,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 18:21:31,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264390112] [2022-01-31 18:21:31,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:31,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 18:21:31,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:31,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 18:21:31,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 18:21:31,032 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:31,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:31,272 INFO L93 Difference]: Finished difference Result 164 states and 205 transitions. [2022-01-31 18:21:31,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 18:21:31,273 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-01-31 18:21:31,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:31,273 INFO L225 Difference]: With dead ends: 164 [2022-01-31 18:21:31,273 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 18:21:31,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 18:21:31,274 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 327 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:31,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 35 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:21:31,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 18:21:31,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2022-01-31 18:21:31,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 111 states have (on average 1.3243243243243243) internal successors, (147), 111 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:31,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 152 transitions. [2022-01-31 18:21:31,287 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 152 transitions. Word has length 94 [2022-01-31 18:21:31,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:31,288 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 152 transitions. [2022-01-31 18:21:31,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:31,288 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 152 transitions. [2022-01-31 18:21:31,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 18:21:31,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:31,288 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:31,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 18:21:31,289 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:31,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:31,289 INFO L85 PathProgramCache]: Analyzing trace with hash 413500434, now seen corresponding path program 11 times [2022-01-31 18:21:31,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:31,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110758450] [2022-01-31 18:21:31,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:31,292 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:31,293 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:31,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:31,294 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:31,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:31,422 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:31,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110758450] [2022-01-31 18:21:31,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [110758450] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:31,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:31,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 18:21:31,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177624949] [2022-01-31 18:21:31,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:31,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 18:21:31,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:31,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 18:21:31,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 18:21:31,423 INFO L87 Difference]: Start difference. First operand 117 states and 152 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:31,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:31,689 INFO L93 Difference]: Finished difference Result 176 states and 220 transitions. [2022-01-31 18:21:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 18:21:31,689 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 18:21:31,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:31,690 INFO L225 Difference]: With dead ends: 176 [2022-01-31 18:21:31,690 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 18:21:31,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:21:31,691 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 346 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:31,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 40 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:21:31,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 18:21:31,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2022-01-31 18:21:31,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 120 states have (on average 1.325) internal successors, (159), 120 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:31,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 164 transitions. [2022-01-31 18:21:31,702 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 164 transitions. Word has length 102 [2022-01-31 18:21:31,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:31,702 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 164 transitions. [2022-01-31 18:21:31,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:31,702 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 164 transitions. [2022-01-31 18:21:31,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 18:21:31,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:31,703 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:31,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 18:21:31,703 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:31,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:31,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2109900438, now seen corresponding path program 12 times [2022-01-31 18:21:31,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:31,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543361025] [2022-01-31 18:21:31,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:31,707 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:31,707 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:31,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:31,708 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:31,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:31,843 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:31,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543361025] [2022-01-31 18:21:31,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1543361025] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:31,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:31,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 18:21:31,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646587729] [2022-01-31 18:21:31,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:31,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 18:21:31,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:31,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 18:21:31,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:21:31,845 INFO L87 Difference]: Start difference. First operand 126 states and 164 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:32,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:32,175 INFO L93 Difference]: Finished difference Result 188 states and 235 transitions. [2022-01-31 18:21:32,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 18:21:32,176 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-01-31 18:21:32,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:32,176 INFO L225 Difference]: With dead ends: 188 [2022-01-31 18:21:32,176 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 18:21:32,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:21:32,179 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 469 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:32,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 30 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:21:32,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 18:21:32,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 135. [2022-01-31 18:21:32,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 129 states have (on average 1.3255813953488371) internal successors, (171), 129 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 176 transitions. [2022-01-31 18:21:32,191 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 176 transitions. Word has length 110 [2022-01-31 18:21:32,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:32,191 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 176 transitions. [2022-01-31 18:21:32,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:32,191 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 176 transitions. [2022-01-31 18:21:32,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-31 18:21:32,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:32,194 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:32,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 18:21:32,194 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:32,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:32,194 INFO L85 PathProgramCache]: Analyzing trace with hash 87072274, now seen corresponding path program 13 times [2022-01-31 18:21:32,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:32,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23926792] [2022-01-31 18:21:32,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:32,196 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:32,196 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:32,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:32,198 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:32,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:32,380 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:32,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23926792] [2022-01-31 18:21:32,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [23926792] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:32,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:32,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 18:21:32,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701903734] [2022-01-31 18:21:32,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:32,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 18:21:32,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:32,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 18:21:32,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 18:21:32,382 INFO L87 Difference]: Start difference. First operand 135 states and 176 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:32,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:32,694 INFO L93 Difference]: Finished difference Result 200 states and 250 transitions. [2022-01-31 18:21:32,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 18:21:32,694 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2022-01-31 18:21:32,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:32,695 INFO L225 Difference]: With dead ends: 200 [2022-01-31 18:21:32,695 INFO L226 Difference]: Without dead ends: 150 [2022-01-31 18:21:32,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 18:21:32,696 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 408 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:32,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 40 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:21:32,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-31 18:21:32,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2022-01-31 18:21:32,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 138 states have (on average 1.326086956521739) internal successors, (183), 138 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:32,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 188 transitions. [2022-01-31 18:21:32,708 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 188 transitions. Word has length 118 [2022-01-31 18:21:32,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:32,708 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 188 transitions. [2022-01-31 18:21:32,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:32,709 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 188 transitions. [2022-01-31 18:21:32,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-31 18:21:32,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:32,709 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:32,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 18:21:32,710 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:32,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:32,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1814139242, now seen corresponding path program 14 times [2022-01-31 18:21:32,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:32,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158756586] [2022-01-31 18:21:32,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:32,712 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:32,712 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:32,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:32,714 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:32,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:32,855 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:32,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158756586] [2022-01-31 18:21:32,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [158756586] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:32,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:32,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 18:21:32,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533168965] [2022-01-31 18:21:32,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:32,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 18:21:32,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:32,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 18:21:32,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 18:21:32,856 INFO L87 Difference]: Start difference. First operand 144 states and 188 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:33,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:33,203 INFO L93 Difference]: Finished difference Result 212 states and 265 transitions. [2022-01-31 18:21:33,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 18:21:33,203 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2022-01-31 18:21:33,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:33,204 INFO L225 Difference]: With dead ends: 212 [2022-01-31 18:21:33,204 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 18:21:33,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 18:21:33,205 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 483 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:33,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 30 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:21:33,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 18:21:33,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 153. [2022-01-31 18:21:33,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 147 states have (on average 1.3265306122448979) internal successors, (195), 147 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:33,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 200 transitions. [2022-01-31 18:21:33,224 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 200 transitions. Word has length 126 [2022-01-31 18:21:33,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:33,225 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 200 transitions. [2022-01-31 18:21:33,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:33,225 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 200 transitions. [2022-01-31 18:21:33,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 18:21:33,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:33,226 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:33,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 18:21:33,226 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:33,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:33,226 INFO L85 PathProgramCache]: Analyzing trace with hash -224331758, now seen corresponding path program 15 times [2022-01-31 18:21:33,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:33,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249203212] [2022-01-31 18:21:33,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:33,230 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:33,230 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:33,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:33,232 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:33,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:33,404 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:33,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249203212] [2022-01-31 18:21:33,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [249203212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:33,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:33,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 18:21:33,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006387791] [2022-01-31 18:21:33,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:33,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 18:21:33,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:33,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 18:21:33,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 18:21:33,406 INFO L87 Difference]: Start difference. First operand 153 states and 200 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:33,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:33,786 INFO L93 Difference]: Finished difference Result 224 states and 280 transitions. [2022-01-31 18:21:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 18:21:33,786 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-01-31 18:21:33,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:33,787 INFO L225 Difference]: With dead ends: 224 [2022-01-31 18:21:33,787 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 18:21:33,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 18:21:33,788 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 518 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:33,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 40 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:21:33,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 18:21:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 162. [2022-01-31 18:21:33,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 156 states have (on average 1.3269230769230769) internal successors, (207), 156 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 212 transitions. [2022-01-31 18:21:33,803 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 212 transitions. Word has length 134 [2022-01-31 18:21:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:33,803 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 212 transitions. [2022-01-31 18:21:33,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 212 transitions. [2022-01-31 18:21:33,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 18:21:33,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:33,804 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:33,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 18:21:33,805 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:33,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:33,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1762367126, now seen corresponding path program 16 times [2022-01-31 18:21:33,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:33,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525238314] [2022-01-31 18:21:33,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:33,808 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:33,808 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:33,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:33,810 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:34,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:34,006 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:34,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525238314] [2022-01-31 18:21:34,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [525238314] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:34,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:34,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 18:21:34,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011243424] [2022-01-31 18:21:34,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:34,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 18:21:34,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:34,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 18:21:34,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 18:21:34,007 INFO L87 Difference]: Start difference. First operand 162 states and 212 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:34,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:34,417 INFO L93 Difference]: Finished difference Result 236 states and 295 transitions. [2022-01-31 18:21:34,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 18:21:34,417 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-01-31 18:21:34,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:34,418 INFO L225 Difference]: With dead ends: 236 [2022-01-31 18:21:34,418 INFO L226 Difference]: Without dead ends: 177 [2022-01-31 18:21:34,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 18:21:34,419 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 489 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:34,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 40 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:21:34,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-31 18:21:34,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 171. [2022-01-31 18:21:34,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 165 states have (on average 1.3272727272727274) internal successors, (219), 165 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:34,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 224 transitions. [2022-01-31 18:21:34,433 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 224 transitions. Word has length 142 [2022-01-31 18:21:34,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:34,434 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 224 transitions. [2022-01-31 18:21:34,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:34,434 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 224 transitions. [2022-01-31 18:21:34,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 18:21:34,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:34,435 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:34,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 18:21:34,435 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:34,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:34,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1769565678, now seen corresponding path program 17 times [2022-01-31 18:21:34,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:34,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984229478] [2022-01-31 18:21:34,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:34,437 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:34,437 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:34,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:34,439 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:34,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:34,618 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:34,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984229478] [2022-01-31 18:21:34,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1984229478] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:34,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:34,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 18:21:34,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735813124] [2022-01-31 18:21:34,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:34,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 18:21:34,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:34,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 18:21:34,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 18:21:34,619 INFO L87 Difference]: Start difference. First operand 171 states and 224 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:35,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:35,069 INFO L93 Difference]: Finished difference Result 248 states and 310 transitions. [2022-01-31 18:21:35,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 18:21:35,069 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2022-01-31 18:21:35,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:35,070 INFO L225 Difference]: With dead ends: 248 [2022-01-31 18:21:35,070 INFO L226 Difference]: Without dead ends: 186 [2022-01-31 18:21:35,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 18:21:35,071 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 444 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:35,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 70 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:21:35,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-31 18:21:35,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 180. [2022-01-31 18:21:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 174 states have (on average 1.3275862068965518) internal successors, (231), 174 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:35,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 236 transitions. [2022-01-31 18:21:35,087 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 236 transitions. Word has length 150 [2022-01-31 18:21:35,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:35,087 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 236 transitions. [2022-01-31 18:21:35,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:35,087 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 236 transitions. [2022-01-31 18:21:35,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 18:21:35,088 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:35,088 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:35,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 18:21:35,088 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:35,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:35,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1797652842, now seen corresponding path program 18 times [2022-01-31 18:21:35,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:35,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366782001] [2022-01-31 18:21:35,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:35,091 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:35,091 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:35,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:35,092 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:35,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:35,291 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:35,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366782001] [2022-01-31 18:21:35,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1366782001] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:35,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:35,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 18:21:35,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735570147] [2022-01-31 18:21:35,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:35,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 18:21:35,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:35,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 18:21:35,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 18:21:35,292 INFO L87 Difference]: Start difference. First operand 180 states and 236 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:35,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:35,740 INFO L93 Difference]: Finished difference Result 260 states and 325 transitions. [2022-01-31 18:21:35,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 18:21:35,740 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2022-01-31 18:21:35,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:35,741 INFO L225 Difference]: With dead ends: 260 [2022-01-31 18:21:35,741 INFO L226 Difference]: Without dead ends: 195 [2022-01-31 18:21:35,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 18:21:35,743 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 719 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:35,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 30 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:21:35,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-31 18:21:35,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 189. [2022-01-31 18:21:35,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 183 states have (on average 1.3278688524590163) internal successors, (243), 183 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:35,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 248 transitions. [2022-01-31 18:21:35,762 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 248 transitions. Word has length 158 [2022-01-31 18:21:35,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:35,762 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 248 transitions. [2022-01-31 18:21:35,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 248 transitions. [2022-01-31 18:21:35,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 18:21:35,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:35,763 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:35,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 18:21:35,763 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:35,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:35,764 INFO L85 PathProgramCache]: Analyzing trace with hash 980511762, now seen corresponding path program 19 times [2022-01-31 18:21:35,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:35,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950791104] [2022-01-31 18:21:35,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:35,766 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:35,766 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:35,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:35,768 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:35,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:36,000 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 18:21:36,001 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:36,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950791104] [2022-01-31 18:21:36,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1950791104] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:36,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:36,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 18:21:36,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383844396] [2022-01-31 18:21:36,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:36,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 18:21:36,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:36,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 18:21:36,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 18:21:36,002 INFO L87 Difference]: Start difference. First operand 189 states and 248 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:36,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:36,516 INFO L93 Difference]: Finished difference Result 272 states and 340 transitions. [2022-01-31 18:21:36,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 18:21:36,517 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2022-01-31 18:21:36,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:36,517 INFO L225 Difference]: With dead ends: 272 [2022-01-31 18:21:36,517 INFO L226 Difference]: Without dead ends: 204 [2022-01-31 18:21:36,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 18:21:36,518 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 642 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:36,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 35 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:21:36,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-01-31 18:21:36,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 198. [2022-01-31 18:21:36,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 192 states have (on average 1.328125) internal successors, (255), 192 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:36,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 260 transitions. [2022-01-31 18:21:36,537 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 260 transitions. Word has length 166 [2022-01-31 18:21:36,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:36,537 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 260 transitions. [2022-01-31 18:21:36,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:36,537 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 260 transitions. [2022-01-31 18:21:36,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 18:21:36,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:36,538 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:36,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 18:21:36,539 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:36,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:36,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1025923434, now seen corresponding path program 20 times [2022-01-31 18:21:36,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:36,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525797342] [2022-01-31 18:21:36,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:36,541 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:36,541 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:36,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:36,543 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:36,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:36,782 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:36,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525797342] [2022-01-31 18:21:36,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1525797342] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:36,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:36,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 18:21:36,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147028253] [2022-01-31 18:21:36,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:36,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 18:21:36,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:36,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 18:21:36,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 18:21:36,783 INFO L87 Difference]: Start difference. First operand 198 states and 260 transitions. Second operand has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:37,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:37,322 INFO L93 Difference]: Finished difference Result 284 states and 355 transitions. [2022-01-31 18:21:37,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 18:21:37,322 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2022-01-31 18:21:37,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:37,323 INFO L225 Difference]: With dead ends: 284 [2022-01-31 18:21:37,323 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 18:21:37,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 18:21:37,324 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 805 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:37,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 40 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:21:37,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 18:21:37,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 207. [2022-01-31 18:21:37,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 201 states have (on average 1.328358208955224) internal successors, (267), 201 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:37,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 272 transitions. [2022-01-31 18:21:37,346 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 272 transitions. Word has length 174 [2022-01-31 18:21:37,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:37,348 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 272 transitions. [2022-01-31 18:21:37,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:37,348 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 272 transitions. [2022-01-31 18:21:37,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 18:21:37,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:37,350 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:37,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 18:21:37,350 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:37,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:37,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1141799406, now seen corresponding path program 21 times [2022-01-31 18:21:37,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:37,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870169305] [2022-01-31 18:21:37,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:37,353 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:37,353 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:37,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:37,355 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:37,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:37,621 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:37,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870169305] [2022-01-31 18:21:37,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [870169305] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:37,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:37,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 18:21:37,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024668403] [2022-01-31 18:21:37,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:37,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 18:21:37,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:37,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 18:21:37,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 18:21:37,623 INFO L87 Difference]: Start difference. First operand 207 states and 272 transitions. Second operand has 25 states, 25 states have (on average 3.12) internal successors, (78), 24 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:38,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:38,181 INFO L93 Difference]: Finished difference Result 296 states and 370 transitions. [2022-01-31 18:21:38,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 18:21:38,182 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 24 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2022-01-31 18:21:38,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:38,182 INFO L225 Difference]: With dead ends: 296 [2022-01-31 18:21:38,182 INFO L226 Difference]: Without dead ends: 222 [2022-01-31 18:21:38,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 18:21:38,184 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 640 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:38,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 45 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:21:38,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-01-31 18:21:38,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 216. [2022-01-31 18:21:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 210 states have (on average 1.3285714285714285) internal successors, (279), 210 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:38,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 284 transitions. [2022-01-31 18:21:38,206 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 284 transitions. Word has length 182 [2022-01-31 18:21:38,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:38,206 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 284 transitions. [2022-01-31 18:21:38,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 24 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:38,206 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 284 transitions. [2022-01-31 18:21:38,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 18:21:38,207 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:38,207 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:38,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 18:21:38,208 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:38,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:38,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1298493802, now seen corresponding path program 22 times [2022-01-31 18:21:38,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:38,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221767944] [2022-01-31 18:21:38,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:38,210 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:38,210 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:38,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:38,212 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:38,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:38,478 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:38,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221767944] [2022-01-31 18:21:38,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1221767944] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:38,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:38,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 18:21:38,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872591378] [2022-01-31 18:21:38,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:38,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 18:21:38,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:38,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 18:21:38,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 18:21:38,479 INFO L87 Difference]: Start difference. First operand 216 states and 284 transitions. Second operand has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 25 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:39,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:39,053 INFO L93 Difference]: Finished difference Result 308 states and 385 transitions. [2022-01-31 18:21:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 18:21:39,053 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 25 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-01-31 18:21:39,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:39,054 INFO L225 Difference]: With dead ends: 308 [2022-01-31 18:21:39,054 INFO L226 Difference]: Without dead ends: 231 [2022-01-31 18:21:39,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 18:21:39,055 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 867 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:39,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 30 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:21:39,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-31 18:21:39,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 225. [2022-01-31 18:21:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 219 states have (on average 1.3287671232876712) internal successors, (291), 219 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:39,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 296 transitions. [2022-01-31 18:21:39,078 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 296 transitions. Word has length 190 [2022-01-31 18:21:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:39,078 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 296 transitions. [2022-01-31 18:21:39,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 25 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:39,078 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 296 transitions. [2022-01-31 18:21:39,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-01-31 18:21:39,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:39,079 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:39,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 18:21:39,079 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:39,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:39,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1936269294, now seen corresponding path program 23 times [2022-01-31 18:21:39,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:39,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487443018] [2022-01-31 18:21:39,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:39,082 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:39,082 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:39,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:39,085 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:39,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:39,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:39,393 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:39,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487443018] [2022-01-31 18:21:39,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1487443018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:39,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:39,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 18:21:39,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066195940] [2022-01-31 18:21:39,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:39,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 18:21:39,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:39,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 18:21:39,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:21:39,395 INFO L87 Difference]: Start difference. First operand 225 states and 296 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:39,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:39,978 INFO L93 Difference]: Finished difference Result 320 states and 400 transitions. [2022-01-31 18:21:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 18:21:39,983 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 198 [2022-01-31 18:21:39,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:39,984 INFO L225 Difference]: With dead ends: 320 [2022-01-31 18:21:39,985 INFO L226 Difference]: Without dead ends: 240 [2022-01-31 18:21:39,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 18:21:39,986 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 782 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:39,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 40 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:21:39,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-31 18:21:40,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 234. [2022-01-31 18:21:40,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 228 states have (on average 1.3289473684210527) internal successors, (303), 228 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:40,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 308 transitions. [2022-01-31 18:21:40,033 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 308 transitions. Word has length 198 [2022-01-31 18:21:40,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:40,035 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 308 transitions. [2022-01-31 18:21:40,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:40,035 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 308 transitions. [2022-01-31 18:21:40,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-31 18:21:40,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:40,036 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:40,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 18:21:40,036 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:40,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:40,036 INFO L85 PathProgramCache]: Analyzing trace with hash -934065814, now seen corresponding path program 24 times [2022-01-31 18:21:40,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:40,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255330101] [2022-01-31 18:21:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:40,038 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:40,039 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:40,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:40,041 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:40,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:40,350 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:40,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255330101] [2022-01-31 18:21:40,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [255330101] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:40,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:40,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 18:21:40,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925604229] [2022-01-31 18:21:40,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:40,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 18:21:40,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:40,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 18:21:40,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 18:21:40,351 INFO L87 Difference]: Start difference. First operand 234 states and 308 transitions. Second operand has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 27 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:41,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:41,014 INFO L93 Difference]: Finished difference Result 332 states and 415 transitions. [2022-01-31 18:21:41,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 18:21:41,014 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 27 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2022-01-31 18:21:41,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:41,015 INFO L225 Difference]: With dead ends: 332 [2022-01-31 18:21:41,015 INFO L226 Difference]: Without dead ends: 249 [2022-01-31 18:21:41,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 18:21:41,016 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 905 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:41,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 30 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:21:41,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-01-31 18:21:41,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 243. [2022-01-31 18:21:41,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 237 states have (on average 1.3291139240506329) internal successors, (315), 237 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:41,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 320 transitions. [2022-01-31 18:21:41,045 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 320 transitions. Word has length 206 [2022-01-31 18:21:41,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:41,045 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 320 transitions. [2022-01-31 18:21:41,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 27 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:41,045 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 320 transitions. [2022-01-31 18:21:41,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 18:21:41,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:41,046 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:41,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 18:21:41,046 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:41,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:41,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1309574638, now seen corresponding path program 25 times [2022-01-31 18:21:41,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:41,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172544739] [2022-01-31 18:21:41,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:41,049 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:41,049 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:41,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:41,051 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:41,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:41,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:41,370 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:41,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172544739] [2022-01-31 18:21:41,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1172544739] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:41,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:41,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 18:21:41,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676676907] [2022-01-31 18:21:41,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:41,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 18:21:41,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:41,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 18:21:41,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:21:41,372 INFO L87 Difference]: Start difference. First operand 243 states and 320 transitions. Second operand has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 28 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:42,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:42,002 INFO L93 Difference]: Finished difference Result 344 states and 430 transitions. [2022-01-31 18:21:42,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 18:21:42,002 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 28 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 214 [2022-01-31 18:21:42,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:42,003 INFO L225 Difference]: With dead ends: 344 [2022-01-31 18:21:42,003 INFO L226 Difference]: Without dead ends: 258 [2022-01-31 18:21:42,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 18:21:42,004 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 924 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:42,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 35 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:21:42,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-01-31 18:21:42,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 252. [2022-01-31 18:21:42,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 246 states have (on average 1.329268292682927) internal successors, (327), 246 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:42,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 332 transitions. [2022-01-31 18:21:42,034 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 332 transitions. Word has length 214 [2022-01-31 18:21:42,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:42,034 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 332 transitions. [2022-01-31 18:21:42,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 28 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:42,034 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 332 transitions. [2022-01-31 18:21:42,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-01-31 18:21:42,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:42,035 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:42,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 18:21:42,035 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:42,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:42,036 INFO L85 PathProgramCache]: Analyzing trace with hash -966794902, now seen corresponding path program 26 times [2022-01-31 18:21:42,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:42,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765433520] [2022-01-31 18:21:42,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:42,038 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:42,039 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:42,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:42,042 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:42,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:42,429 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:42,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765433520] [2022-01-31 18:21:42,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [765433520] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:42,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:42,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 18:21:42,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121474365] [2022-01-31 18:21:42,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:42,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 18:21:42,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:42,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 18:21:42,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 18:21:42,430 INFO L87 Difference]: Start difference. First operand 252 states and 332 transitions. Second operand has 30 states, 30 states have (on average 3.1) internal successors, (93), 29 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:43,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:43,119 INFO L93 Difference]: Finished difference Result 356 states and 445 transitions. [2022-01-31 18:21:43,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 18:21:43,119 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1) internal successors, (93), 29 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 222 [2022-01-31 18:21:43,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:43,120 INFO L225 Difference]: With dead ends: 356 [2022-01-31 18:21:43,120 INFO L226 Difference]: Without dead ends: 267 [2022-01-31 18:21:43,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 18:21:43,121 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1087 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1088 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:43,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1088 Valid, 30 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:21:43,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-01-31 18:21:43,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 261. [2022-01-31 18:21:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 255 states have (on average 1.3294117647058823) internal successors, (339), 255 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 344 transitions. [2022-01-31 18:21:43,152 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 344 transitions. Word has length 222 [2022-01-31 18:21:43,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:43,152 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 344 transitions. [2022-01-31 18:21:43,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1) internal successors, (93), 29 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:43,152 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 344 transitions. [2022-01-31 18:21:43,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 18:21:43,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:43,153 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:43,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 18:21:43,153 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:43,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:43,153 INFO L85 PathProgramCache]: Analyzing trace with hash -980331502, now seen corresponding path program 27 times [2022-01-31 18:21:43,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:43,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866308091] [2022-01-31 18:21:43,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:43,156 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:43,156 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:43,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:43,158 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:43,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:43,503 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:43,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866308091] [2022-01-31 18:21:43,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [866308091] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:43,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:43,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 18:21:43,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264592414] [2022-01-31 18:21:43,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:43,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 18:21:43,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:43,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 18:21:43,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 18:21:43,505 INFO L87 Difference]: Start difference. First operand 261 states and 344 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:44,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:44,263 INFO L93 Difference]: Finished difference Result 368 states and 460 transitions. [2022-01-31 18:21:44,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 18:21:44,263 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 230 [2022-01-31 18:21:44,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:44,264 INFO L225 Difference]: With dead ends: 368 [2022-01-31 18:21:44,264 INFO L226 Difference]: Without dead ends: 276 [2022-01-31 18:21:44,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 18:21:44,266 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 850 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:44,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 45 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:21:44,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-01-31 18:21:44,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 270. [2022-01-31 18:21:44,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 264 states have (on average 1.3295454545454546) internal successors, (351), 264 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:44,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 356 transitions. [2022-01-31 18:21:44,299 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 356 transitions. Word has length 230 [2022-01-31 18:21:44,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:44,299 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 356 transitions. [2022-01-31 18:21:44,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:44,299 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 356 transitions. [2022-01-31 18:21:44,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-01-31 18:21:44,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:44,300 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:44,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 18:21:44,300 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:44,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:44,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1274755434, now seen corresponding path program 28 times [2022-01-31 18:21:44,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:44,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112571059] [2022-01-31 18:21:44,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:44,303 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:44,303 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:44,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:44,306 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:44,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:44,660 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:44,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112571059] [2022-01-31 18:21:44,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1112571059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:44,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:44,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 18:21:44,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104878489] [2022-01-31 18:21:44,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:44,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 18:21:44,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:44,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 18:21:44,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 18:21:44,662 INFO L87 Difference]: Start difference. First operand 270 states and 356 transitions. Second operand has 32 states, 32 states have (on average 3.09375) internal successors, (99), 31 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:45,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:45,438 INFO L93 Difference]: Finished difference Result 380 states and 475 transitions. [2022-01-31 18:21:45,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 18:21:45,440 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.09375) internal successors, (99), 31 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 238 [2022-01-31 18:21:45,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:45,441 INFO L225 Difference]: With dead ends: 380 [2022-01-31 18:21:45,441 INFO L226 Difference]: Without dead ends: 285 [2022-01-31 18:21:45,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 18:21:45,443 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 965 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:45,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [966 Valid, 45 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:21:45,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-31 18:21:45,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 279. [2022-01-31 18:21:45,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 273 states have (on average 1.3296703296703296) internal successors, (363), 273 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:45,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 368 transitions. [2022-01-31 18:21:45,478 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 368 transitions. Word has length 238 [2022-01-31 18:21:45,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:45,479 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 368 transitions. [2022-01-31 18:21:45,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.09375) internal successors, (99), 31 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:45,479 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 368 transitions. [2022-01-31 18:21:45,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-01-31 18:21:45,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:45,480 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:45,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 18:21:45,480 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:45,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:45,480 INFO L85 PathProgramCache]: Analyzing trace with hash -184127982, now seen corresponding path program 29 times [2022-01-31 18:21:45,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:45,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178307835] [2022-01-31 18:21:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:45,483 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:45,483 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:45,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:45,486 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:45,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:45,879 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:45,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178307835] [2022-01-31 18:21:45,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [178307835] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:45,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:45,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 18:21:45,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27180003] [2022-01-31 18:21:45,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:45,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 18:21:45,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:45,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 18:21:45,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 18:21:45,880 INFO L87 Difference]: Start difference. First operand 279 states and 368 transitions. Second operand has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 32 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:46,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:46,673 INFO L93 Difference]: Finished difference Result 392 states and 490 transitions. [2022-01-31 18:21:46,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 18:21:46,674 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 32 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 246 [2022-01-31 18:21:46,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:46,675 INFO L225 Difference]: With dead ends: 392 [2022-01-31 18:21:46,675 INFO L226 Difference]: Without dead ends: 294 [2022-01-31 18:21:46,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 18:21:46,676 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1152 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:46,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1153 Valid, 40 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:21:46,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-01-31 18:21:46,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 288. [2022-01-31 18:21:46,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 282 states have (on average 1.3297872340425532) internal successors, (375), 282 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:46,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 380 transitions. [2022-01-31 18:21:46,713 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 380 transitions. Word has length 246 [2022-01-31 18:21:46,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:46,713 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 380 transitions. [2022-01-31 18:21:46,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 32 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:46,713 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 380 transitions. [2022-01-31 18:21:46,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-01-31 18:21:46,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:46,714 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:46,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 18:21:46,715 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:46,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:46,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1234522474, now seen corresponding path program 30 times [2022-01-31 18:21:46,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:46,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50089096] [2022-01-31 18:21:46,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:46,717 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:46,717 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:46,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:46,720 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:46,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:47,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:47,153 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 18:21:47,153 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:47,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50089096] [2022-01-31 18:21:47,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [50089096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:47,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:47,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 18:21:47,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628256351] [2022-01-31 18:21:47,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:47,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 18:21:47,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:47,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 18:21:47,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 18:21:47,154 INFO L87 Difference]: Start difference. First operand 288 states and 380 transitions. Second operand has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 33 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:47,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:47,995 INFO L93 Difference]: Finished difference Result 404 states and 505 transitions. [2022-01-31 18:21:47,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 18:21:47,996 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 33 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 254 [2022-01-31 18:21:47,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:47,997 INFO L225 Difference]: With dead ends: 404 [2022-01-31 18:21:47,997 INFO L226 Difference]: Without dead ends: 303 [2022-01-31 18:21:47,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 18:21:47,998 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1091 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1092 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:47,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1092 Valid, 40 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:21:47,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-31 18:21:48,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 297. [2022-01-31 18:21:48,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 291 states have (on average 1.3298969072164948) internal successors, (387), 291 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:48,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 392 transitions. [2022-01-31 18:21:48,051 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 392 transitions. Word has length 254 [2022-01-31 18:21:48,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:48,051 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 392 transitions. [2022-01-31 18:21:48,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 33 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:48,051 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 392 transitions. [2022-01-31 18:21:48,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-01-31 18:21:48,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:48,052 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:48,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 18:21:48,052 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:48,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:48,053 INFO L85 PathProgramCache]: Analyzing trace with hash 31508498, now seen corresponding path program 31 times [2022-01-31 18:21:48,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:48,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745244843] [2022-01-31 18:21:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:48,055 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:48,055 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:48,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:48,058 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:48,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:48,496 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:48,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745244843] [2022-01-31 18:21:48,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [745244843] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:48,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:48,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 18:21:48,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048938131] [2022-01-31 18:21:48,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:48,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 18:21:48,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:48,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 18:21:48,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 18:21:48,497 INFO L87 Difference]: Start difference. First operand 297 states and 392 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:49,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:49,380 INFO L93 Difference]: Finished difference Result 416 states and 520 transitions. [2022-01-31 18:21:49,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 18:21:49,380 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 262 [2022-01-31 18:21:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:49,381 INFO L225 Difference]: With dead ends: 416 [2022-01-31 18:21:49,381 INFO L226 Difference]: Without dead ends: 312 [2022-01-31 18:21:49,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 18:21:49,383 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1302 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1303 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:49,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1303 Valid, 30 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:21:49,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-31 18:21:49,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 306. [2022-01-31 18:21:49,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 300 states have (on average 1.33) internal successors, (399), 300 states have internal predecessors, (399), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:49,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 404 transitions. [2022-01-31 18:21:49,440 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 404 transitions. Word has length 262 [2022-01-31 18:21:49,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:49,440 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 404 transitions. [2022-01-31 18:21:49,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:49,441 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 404 transitions. [2022-01-31 18:21:49,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-31 18:21:49,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:49,441 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:49,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 18:21:49,442 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:49,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:49,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1684133526, now seen corresponding path program 32 times [2022-01-31 18:21:49,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:49,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325274922] [2022-01-31 18:21:49,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:49,447 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:49,447 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:49,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:49,450 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:49,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:49,900 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:49,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325274922] [2022-01-31 18:21:49,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [325274922] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:49,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:49,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 18:21:49,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887906830] [2022-01-31 18:21:49,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:49,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 18:21:49,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:49,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 18:21:49,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 18:21:49,902 INFO L87 Difference]: Start difference. First operand 306 states and 404 transitions. Second operand has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 35 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:50,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:50,785 INFO L93 Difference]: Finished difference Result 428 states and 535 transitions. [2022-01-31 18:21:50,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 18:21:50,785 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 35 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 270 [2022-01-31 18:21:50,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:50,787 INFO L225 Difference]: With dead ends: 428 [2022-01-31 18:21:50,787 INFO L226 Difference]: Without dead ends: 321 [2022-01-31 18:21:50,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 18:21:50,788 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1393 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1394 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:50,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1394 Valid, 45 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:21:50,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-01-31 18:21:50,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 315. [2022-01-31 18:21:50,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 309 states have (on average 1.3300970873786409) internal successors, (411), 309 states have internal predecessors, (411), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 416 transitions. [2022-01-31 18:21:50,841 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 416 transitions. Word has length 270 [2022-01-31 18:21:50,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:50,841 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 416 transitions. [2022-01-31 18:21:50,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 35 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:50,842 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 416 transitions. [2022-01-31 18:21:50,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-01-31 18:21:50,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:50,843 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:50,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 18:21:50,843 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:50,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:50,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1102078482, now seen corresponding path program 33 times [2022-01-31 18:21:50,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:50,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387120676] [2022-01-31 18:21:50,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:50,847 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:50,847 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:50,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:50,850 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:51,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:51,325 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:51,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387120676] [2022-01-31 18:21:51,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1387120676] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:51,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:51,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 18:21:51,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425643448] [2022-01-31 18:21:51,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:51,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 18:21:51,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:51,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 18:21:51,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 18:21:51,326 INFO L87 Difference]: Start difference. First operand 315 states and 416 transitions. Second operand has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 36 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:52,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:52,257 INFO L93 Difference]: Finished difference Result 440 states and 550 transitions. [2022-01-31 18:21:52,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 18:21:52,258 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 36 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 278 [2022-01-31 18:21:52,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:52,259 INFO L225 Difference]: With dead ends: 440 [2022-01-31 18:21:52,259 INFO L226 Difference]: Without dead ends: 330 [2022-01-31 18:21:52,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 18:21:52,260 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1204 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:52,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 40 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:21:52,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-01-31 18:21:52,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 324. [2022-01-31 18:21:52,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 318 states have (on average 1.330188679245283) internal successors, (423), 318 states have internal predecessors, (423), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 428 transitions. [2022-01-31 18:21:52,308 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 428 transitions. Word has length 278 [2022-01-31 18:21:52,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:52,308 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 428 transitions. [2022-01-31 18:21:52,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 36 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:52,308 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 428 transitions. [2022-01-31 18:21:52,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-01-31 18:21:52,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:52,309 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:52,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 18:21:52,310 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:52,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:52,310 INFO L85 PathProgramCache]: Analyzing trace with hash 176537962, now seen corresponding path program 34 times [2022-01-31 18:21:52,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:52,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789079128] [2022-01-31 18:21:52,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:52,312 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:52,312 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:52,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:52,315 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:52,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:52,851 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:52,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789079128] [2022-01-31 18:21:52,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [789079128] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:52,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:52,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 18:21:52,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574388444] [2022-01-31 18:21:52,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:52,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 18:21:52,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:52,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 18:21:52,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 18:21:52,852 INFO L87 Difference]: Start difference. First operand 324 states and 428 transitions. Second operand has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 37 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:53,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:53,808 INFO L93 Difference]: Finished difference Result 452 states and 565 transitions. [2022-01-31 18:21:53,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 18:21:53,809 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 37 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 286 [2022-01-31 18:21:53,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:53,810 INFO L225 Difference]: With dead ends: 452 [2022-01-31 18:21:53,810 INFO L226 Difference]: Without dead ends: 339 [2022-01-31 18:21:53,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:21:53,811 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1183 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:53,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1184 Valid, 45 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:21:53,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-01-31 18:21:53,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 333. [2022-01-31 18:21:53,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 327 states have (on average 1.3302752293577982) internal successors, (435), 327 states have internal predecessors, (435), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 440 transitions. [2022-01-31 18:21:53,865 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 440 transitions. Word has length 286 [2022-01-31 18:21:53,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:53,865 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 440 transitions. [2022-01-31 18:21:53,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 37 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:53,865 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 440 transitions. [2022-01-31 18:21:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-01-31 18:21:53,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:53,866 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:53,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 18:21:53,867 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:53,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:53,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1643824110, now seen corresponding path program 35 times [2022-01-31 18:21:53,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:53,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295908104] [2022-01-31 18:21:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:53,869 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:53,869 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:53,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:53,873 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:54,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:54,407 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:54,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295908104] [2022-01-31 18:21:54,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1295908104] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:54,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:54,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 18:21:54,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046819854] [2022-01-31 18:21:54,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:54,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 18:21:54,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:54,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 18:21:54,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 18:21:54,408 INFO L87 Difference]: Start difference. First operand 333 states and 440 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:55,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:55,483 INFO L93 Difference]: Finished difference Result 464 states and 580 transitions. [2022-01-31 18:21:55,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 18:21:55,483 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 294 [2022-01-31 18:21:55,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:55,485 INFO L225 Difference]: With dead ends: 464 [2022-01-31 18:21:55,485 INFO L226 Difference]: Without dead ends: 348 [2022-01-31 18:21:55,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 18:21:55,486 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1450 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1451 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:55,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1451 Valid, 50 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:21:55,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-01-31 18:21:55,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 342. [2022-01-31 18:21:55,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 336 states have (on average 1.3303571428571428) internal successors, (447), 336 states have internal predecessors, (447), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:55,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 452 transitions. [2022-01-31 18:21:55,562 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 452 transitions. Word has length 294 [2022-01-31 18:21:55,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:55,562 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 452 transitions. [2022-01-31 18:21:55,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:55,562 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 452 transitions. [2022-01-31 18:21:55,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-01-31 18:21:55,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:55,563 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:55,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 18:21:55,563 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:55,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:55,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1253841258, now seen corresponding path program 36 times [2022-01-31 18:21:55,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:55,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202871527] [2022-01-31 18:21:55,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:55,566 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:55,566 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:55,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:55,570 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:56,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:56,172 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:56,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202871527] [2022-01-31 18:21:56,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1202871527] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:56,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:56,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 18:21:56,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063984010] [2022-01-31 18:21:56,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:56,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 18:21:56,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:56,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 18:21:56,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 18:21:56,174 INFO L87 Difference]: Start difference. First operand 342 states and 452 transitions. Second operand has 40 states, 40 states have (on average 3.075) internal successors, (123), 39 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:57,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:57,327 INFO L93 Difference]: Finished difference Result 476 states and 595 transitions. [2022-01-31 18:21:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 18:21:57,328 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.075) internal successors, (123), 39 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 302 [2022-01-31 18:21:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:57,329 INFO L225 Difference]: With dead ends: 476 [2022-01-31 18:21:57,329 INFO L226 Difference]: Without dead ends: 357 [2022-01-31 18:21:57,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 18:21:57,331 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1669 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1670 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:57,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1670 Valid, 35 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:21:57,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-01-31 18:21:57,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 351. [2022-01-31 18:21:57,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 345 states have (on average 1.3304347826086957) internal successors, (459), 345 states have internal predecessors, (459), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:57,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 464 transitions. [2022-01-31 18:21:57,400 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 464 transitions. Word has length 302 [2022-01-31 18:21:57,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:57,401 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 464 transitions. [2022-01-31 18:21:57,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.075) internal successors, (123), 39 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:57,401 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 464 transitions. [2022-01-31 18:21:57,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-01-31 18:21:57,402 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:57,402 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:57,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 18:21:57,402 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:57,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:57,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1804642798, now seen corresponding path program 37 times [2022-01-31 18:21:57,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:57,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865450353] [2022-01-31 18:21:57,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:57,405 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:57,405 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:57,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:57,409 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:57,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:57,976 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:57,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865450353] [2022-01-31 18:21:57,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [865450353] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:57,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:57,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 18:21:57,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542995528] [2022-01-31 18:21:57,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:57,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 18:21:57,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:57,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 18:21:57,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 18:21:57,977 INFO L87 Difference]: Start difference. First operand 351 states and 464 transitions. Second operand has 41 states, 41 states have (on average 3.073170731707317) internal successors, (126), 40 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:59,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:59,121 INFO L93 Difference]: Finished difference Result 488 states and 610 transitions. [2022-01-31 18:21:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 18:21:59,122 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.073170731707317) internal successors, (126), 40 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 310 [2022-01-31 18:21:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:59,123 INFO L225 Difference]: With dead ends: 488 [2022-01-31 18:21:59,123 INFO L226 Difference]: Without dead ends: 366 [2022-01-31 18:21:59,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 18:21:59,124 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1192 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:59,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 60 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:21:59,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-01-31 18:21:59,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 360. [2022-01-31 18:21:59,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 354 states have (on average 1.3305084745762712) internal successors, (471), 354 states have internal predecessors, (471), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:59,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 476 transitions. [2022-01-31 18:21:59,179 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 476 transitions. Word has length 310 [2022-01-31 18:21:59,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:59,180 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 476 transitions. [2022-01-31 18:21:59,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.073170731707317) internal successors, (126), 40 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:59,180 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 476 transitions. [2022-01-31 18:21:59,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-01-31 18:21:59,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:59,181 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:59,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 18:21:59,181 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:59,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:59,181 INFO L85 PathProgramCache]: Analyzing trace with hash -55496342, now seen corresponding path program 38 times [2022-01-31 18:21:59,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:59,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138746165] [2022-01-31 18:21:59,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:59,184 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:59,184 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:59,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:59,188 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:59,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:59,879 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:59,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138746165] [2022-01-31 18:21:59,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1138746165] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:59,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:59,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 18:21:59,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794570683] [2022-01-31 18:21:59,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:59,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 18:21:59,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:59,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 18:21:59,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 18:21:59,881 INFO L87 Difference]: Start difference. First operand 360 states and 476 transitions. Second operand has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 41 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:01,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:01,064 INFO L93 Difference]: Finished difference Result 500 states and 625 transitions. [2022-01-31 18:22:01,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 18:22:01,064 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 41 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 318 [2022-01-31 18:22:01,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:01,065 INFO L225 Difference]: With dead ends: 500 [2022-01-31 18:22:01,065 INFO L226 Difference]: Without dead ends: 375 [2022-01-31 18:22:01,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 18:22:01,067 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1707 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1708 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:01,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1708 Valid, 40 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:22:01,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-01-31 18:22:01,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 369. [2022-01-31 18:22:01,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 363 states have (on average 1.3305785123966942) internal successors, (483), 363 states have internal predecessors, (483), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:01,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 488 transitions. [2022-01-31 18:22:01,125 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 488 transitions. Word has length 318 [2022-01-31 18:22:01,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:01,126 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 488 transitions. [2022-01-31 18:22:01,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 41 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:01,126 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 488 transitions. [2022-01-31 18:22:01,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-01-31 18:22:01,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:01,127 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:01,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 18:22:01,127 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:01,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:01,128 INFO L85 PathProgramCache]: Analyzing trace with hash 914272274, now seen corresponding path program 39 times [2022-01-31 18:22:01,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:01,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74514009] [2022-01-31 18:22:01,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:01,130 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:01,130 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:01,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:01,134 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:01,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:01,769 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:01,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74514009] [2022-01-31 18:22:01,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [74514009] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:01,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:01,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 18:22:01,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487672080] [2022-01-31 18:22:01,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:01,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 18:22:01,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:01,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 18:22:01,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 18:22:01,770 INFO L87 Difference]: Start difference. First operand 369 states and 488 transitions. Second operand has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 42 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:02,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:02,988 INFO L93 Difference]: Finished difference Result 512 states and 640 transitions. [2022-01-31 18:22:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 18:22:02,989 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 42 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 326 [2022-01-31 18:22:02,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:02,990 INFO L225 Difference]: With dead ends: 512 [2022-01-31 18:22:02,990 INFO L226 Difference]: Without dead ends: 384 [2022-01-31 18:22:02,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 18:22:02,991 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2103 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:02,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2103 Valid, 30 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:22:02,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-01-31 18:22:03,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 378. [2022-01-31 18:22:03,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 372 states have (on average 1.3306451612903225) internal successors, (495), 372 states have internal predecessors, (495), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:03,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 500 transitions. [2022-01-31 18:22:03,051 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 500 transitions. Word has length 326 [2022-01-31 18:22:03,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:03,052 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 500 transitions. [2022-01-31 18:22:03,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 42 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:03,052 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 500 transitions. [2022-01-31 18:22:03,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-01-31 18:22:03,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:03,053 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:03,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 18:22:03,053 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:03,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:03,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1395324566, now seen corresponding path program 40 times [2022-01-31 18:22:03,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:03,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561600009] [2022-01-31 18:22:03,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:03,056 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:03,056 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:03,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:03,060 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:03,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:03,721 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:03,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561600009] [2022-01-31 18:22:03,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1561600009] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:03,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:03,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 18:22:03,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427128003] [2022-01-31 18:22:03,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:03,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 18:22:03,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:03,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 18:22:03,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 18:22:03,723 INFO L87 Difference]: Start difference. First operand 378 states and 500 transitions. Second operand has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 43 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:04,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:04,977 INFO L93 Difference]: Finished difference Result 524 states and 655 transitions. [2022-01-31 18:22:04,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 18:22:04,977 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 43 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 334 [2022-01-31 18:22:04,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:04,979 INFO L225 Difference]: With dead ends: 524 [2022-01-31 18:22:04,979 INFO L226 Difference]: Without dead ends: 393 [2022-01-31 18:22:04,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 18:22:04,979 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1313 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:04,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1314 Valid, 55 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:22:04,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-31 18:22:05,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 387. [2022-01-31 18:22:05,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 381 states have (on average 1.330708661417323) internal successors, (507), 381 states have internal predecessors, (507), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:05,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 512 transitions. [2022-01-31 18:22:05,045 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 512 transitions. Word has length 334 [2022-01-31 18:22:05,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:05,045 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 512 transitions. [2022-01-31 18:22:05,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 43 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:05,045 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 512 transitions. [2022-01-31 18:22:05,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-01-31 18:22:05,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:05,046 INFO L514 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:05,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 18:22:05,047 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:05,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:05,047 INFO L85 PathProgramCache]: Analyzing trace with hash 700664338, now seen corresponding path program 41 times [2022-01-31 18:22:05,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:05,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840326095] [2022-01-31 18:22:05,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:05,049 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:05,050 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:05,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:05,054 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:05,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:05,698 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:05,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840326095] [2022-01-31 18:22:05,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1840326095] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:05,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:05,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 18:22:05,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825607299] [2022-01-31 18:22:05,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:05,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 18:22:05,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:05,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 18:22:05,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 18:22:05,699 INFO L87 Difference]: Start difference. First operand 387 states and 512 transitions. Second operand has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 44 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:07,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:07,040 INFO L93 Difference]: Finished difference Result 536 states and 670 transitions. [2022-01-31 18:22:07,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 18:22:07,041 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 44 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 342 [2022-01-31 18:22:07,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:07,042 INFO L225 Difference]: With dead ends: 536 [2022-01-31 18:22:07,042 INFO L226 Difference]: Without dead ends: 402 [2022-01-31 18:22:07,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 18:22:07,043 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1436 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1437 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:07,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1437 Valid, 60 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:22:07,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-01-31 18:22:07,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 396. [2022-01-31 18:22:07,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 390 states have (on average 1.3307692307692307) internal successors, (519), 390 states have internal predecessors, (519), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:07,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 524 transitions. [2022-01-31 18:22:07,113 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 524 transitions. Word has length 342 [2022-01-31 18:22:07,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:07,115 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 524 transitions. [2022-01-31 18:22:07,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 44 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:07,115 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 524 transitions. [2022-01-31 18:22:07,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-01-31 18:22:07,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:07,116 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:07,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 18:22:07,116 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:07,117 INFO L85 PathProgramCache]: Analyzing trace with hash -745037462, now seen corresponding path program 42 times [2022-01-31 18:22:07,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:07,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76180423] [2022-01-31 18:22:07,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:07,119 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:07,119 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:07,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:07,124 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:07,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:07,807 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:07,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76180423] [2022-01-31 18:22:07,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [76180423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:07,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:07,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 18:22:07,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259086242] [2022-01-31 18:22:07,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:07,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 18:22:07,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:07,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 18:22:07,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 18:22:07,809 INFO L87 Difference]: Start difference. First operand 396 states and 524 transitions. Second operand has 46 states, 46 states have (on average 3.0652173913043477) internal successors, (141), 45 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:09,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:09,163 INFO L93 Difference]: Finished difference Result 548 states and 685 transitions. [2022-01-31 18:22:09,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 18:22:09,163 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0652173913043477) internal successors, (141), 45 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 350 [2022-01-31 18:22:09,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:09,164 INFO L225 Difference]: With dead ends: 548 [2022-01-31 18:22:09,164 INFO L226 Difference]: Without dead ends: 411 [2022-01-31 18:22:09,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:22:09,166 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1455 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1456 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:09,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1456 Valid, 60 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:22:09,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-01-31 18:22:09,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 405. [2022-01-31 18:22:09,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 399 states have (on average 1.330827067669173) internal successors, (531), 399 states have internal predecessors, (531), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:09,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 536 transitions. [2022-01-31 18:22:09,246 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 536 transitions. Word has length 350 [2022-01-31 18:22:09,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:09,246 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 536 transitions. [2022-01-31 18:22:09,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0652173913043477) internal successors, (141), 45 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:09,246 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 536 transitions. [2022-01-31 18:22:09,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-01-31 18:22:09,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:09,248 INFO L514 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:09,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 18:22:09,248 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:09,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:09,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1479728110, now seen corresponding path program 43 times [2022-01-31 18:22:09,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:09,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201008783] [2022-01-31 18:22:09,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:09,251 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:09,251 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:09,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:09,256 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:09,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:09,972 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:09,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201008783] [2022-01-31 18:22:09,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1201008783] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:09,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:09,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 18:22:09,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29017433] [2022-01-31 18:22:09,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:09,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 18:22:09,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:09,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 18:22:09,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 18:22:09,974 INFO L87 Difference]: Start difference. First operand 405 states and 536 transitions. Second operand has 47 states, 47 states have (on average 3.0638297872340425) internal successors, (144), 46 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:11,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:11,403 INFO L93 Difference]: Finished difference Result 560 states and 700 transitions. [2022-01-31 18:22:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 18:22:11,404 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.0638297872340425) internal successors, (144), 46 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 358 [2022-01-31 18:22:11,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:11,405 INFO L225 Difference]: With dead ends: 560 [2022-01-31 18:22:11,405 INFO L226 Difference]: Without dead ends: 420 [2022-01-31 18:22:11,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 18:22:11,406 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1682 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1683 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:11,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1683 Valid, 45 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:22:11,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-01-31 18:22:11,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 414. [2022-01-31 18:22:11,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 408 states have (on average 1.3308823529411764) internal successors, (543), 408 states have internal predecessors, (543), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:11,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 548 transitions. [2022-01-31 18:22:11,480 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 548 transitions. Word has length 358 [2022-01-31 18:22:11,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:11,480 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 548 transitions. [2022-01-31 18:22:11,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.0638297872340425) internal successors, (144), 46 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:11,481 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 548 transitions. [2022-01-31 18:22:11,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-01-31 18:22:11,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:11,482 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:11,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 18:22:11,482 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:11,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:11,482 INFO L85 PathProgramCache]: Analyzing trace with hash -714540694, now seen corresponding path program 44 times [2022-01-31 18:22:11,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:11,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248610794] [2022-01-31 18:22:11,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:11,485 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:11,485 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:11,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:11,490 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:12,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:12,235 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:12,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248610794] [2022-01-31 18:22:12,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [248610794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:12,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:12,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 18:22:12,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262885492] [2022-01-31 18:22:12,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:12,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 18:22:12,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:12,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 18:22:12,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 18:22:12,236 INFO L87 Difference]: Start difference. First operand 414 states and 548 transitions. Second operand has 48 states, 48 states have (on average 3.0625) internal successors, (147), 47 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:13,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:13,683 INFO L93 Difference]: Finished difference Result 572 states and 715 transitions. [2022-01-31 18:22:13,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 18:22:13,683 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 47 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 366 [2022-01-31 18:22:13,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:13,684 INFO L225 Difference]: With dead ends: 572 [2022-01-31 18:22:13,684 INFO L226 Difference]: Without dead ends: 429 [2022-01-31 18:22:13,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 18:22:13,685 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1757 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1758 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:13,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1758 Valid, 55 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:22:13,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-31 18:22:13,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 423. [2022-01-31 18:22:13,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 417 states have (on average 1.330935251798561) internal successors, (555), 417 states have internal predecessors, (555), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:13,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 560 transitions. [2022-01-31 18:22:13,762 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 560 transitions. Word has length 366 [2022-01-31 18:22:13,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:13,763 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 560 transitions. [2022-01-31 18:22:13,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 47 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:13,763 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 560 transitions. [2022-01-31 18:22:13,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-01-31 18:22:13,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:13,764 INFO L514 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:13,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 18:22:13,764 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:13,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:13,765 INFO L85 PathProgramCache]: Analyzing trace with hash 2116828690, now seen corresponding path program 45 times [2022-01-31 18:22:13,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:13,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632911714] [2022-01-31 18:22:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:13,767 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:13,767 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:13,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:13,772 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:14,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:14,557 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:14,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632911714] [2022-01-31 18:22:14,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1632911714] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:14,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:14,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 18:22:14,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829658966] [2022-01-31 18:22:14,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:14,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 18:22:14,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:14,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 18:22:14,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 18:22:14,559 INFO L87 Difference]: Start difference. First operand 423 states and 560 transitions. Second operand has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 48 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:16,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:16,022 INFO L93 Difference]: Finished difference Result 584 states and 730 transitions. [2022-01-31 18:22:16,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 18:22:16,022 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 48 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 374 [2022-01-31 18:22:16,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:16,023 INFO L225 Difference]: With dead ends: 584 [2022-01-31 18:22:16,024 INFO L226 Difference]: Without dead ends: 438 [2022-01-31 18:22:16,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 18:22:16,025 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1832 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1833 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:16,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1833 Valid, 40 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:22:16,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-01-31 18:22:16,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 432. [2022-01-31 18:22:16,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 426 states have (on average 1.3309859154929577) internal successors, (567), 426 states have internal predecessors, (567), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:16,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 572 transitions. [2022-01-31 18:22:16,115 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 572 transitions. Word has length 374 [2022-01-31 18:22:16,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:16,116 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 572 transitions. [2022-01-31 18:22:16,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 48 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:16,116 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 572 transitions. [2022-01-31 18:22:16,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-01-31 18:22:16,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:16,117 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:16,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 18:22:16,117 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:16,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:16,118 INFO L85 PathProgramCache]: Analyzing trace with hash 45683050, now seen corresponding path program 46 times [2022-01-31 18:22:16,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:16,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155681007] [2022-01-31 18:22:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:16,120 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:16,120 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:16,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:16,125 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:16,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:16,913 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:16,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155681007] [2022-01-31 18:22:16,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1155681007] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:16,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:16,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 18:22:16,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829460740] [2022-01-31 18:22:16,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:16,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 18:22:16,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:16,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 18:22:16,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 18:22:16,915 INFO L87 Difference]: Start difference. First operand 432 states and 572 transitions. Second operand has 50 states, 50 states have (on average 3.06) internal successors, (153), 49 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:18,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:18,457 INFO L93 Difference]: Finished difference Result 596 states and 745 transitions. [2022-01-31 18:22:18,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 18:22:18,457 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.06) internal successors, (153), 49 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 382 [2022-01-31 18:22:18,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:18,458 INFO L225 Difference]: With dead ends: 596 [2022-01-31 18:22:18,458 INFO L226 Difference]: Without dead ends: 447 [2022-01-31 18:22:18,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 18:22:18,462 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2099 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2100 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:18,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2100 Valid, 30 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:22:18,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-31 18:22:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 441. [2022-01-31 18:22:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 435 states have (on average 1.3310344827586207) internal successors, (579), 435 states have internal predecessors, (579), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:18,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 584 transitions. [2022-01-31 18:22:18,544 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 584 transitions. Word has length 382 [2022-01-31 18:22:18,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:18,544 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 584 transitions. [2022-01-31 18:22:18,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.06) internal successors, (153), 49 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:18,544 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 584 transitions. [2022-01-31 18:22:18,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2022-01-31 18:22:18,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:18,545 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:18,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 18:22:18,546 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:18,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:18,546 INFO L85 PathProgramCache]: Analyzing trace with hash 242259986, now seen corresponding path program 47 times [2022-01-31 18:22:18,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:18,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021047635] [2022-01-31 18:22:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:18,548 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:18,548 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:18,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:18,559 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:19,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:19,405 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:19,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021047635] [2022-01-31 18:22:19,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1021047635] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:19,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:19,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 18:22:19,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041435942] [2022-01-31 18:22:19,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:19,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 18:22:19,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:19,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 18:22:19,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 18:22:19,407 INFO L87 Difference]: Start difference. First operand 441 states and 584 transitions. Second operand has 51 states, 51 states have (on average 3.0588235294117645) internal successors, (156), 50 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:21,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:21,036 INFO L93 Difference]: Finished difference Result 608 states and 760 transitions. [2022-01-31 18:22:21,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 18:22:21,036 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.0588235294117645) internal successors, (156), 50 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 390 [2022-01-31 18:22:21,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:21,037 INFO L225 Difference]: With dead ends: 608 [2022-01-31 18:22:21,038 INFO L226 Difference]: Without dead ends: 456 [2022-01-31 18:22:21,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 18:22:21,040 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1646 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:21,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1647 Valid, 45 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:22:21,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-01-31 18:22:21,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 450. [2022-01-31 18:22:21,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 444 states have (on average 1.3310810810810811) internal successors, (591), 444 states have internal predecessors, (591), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:21,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 596 transitions. [2022-01-31 18:22:21,129 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 596 transitions. Word has length 390 [2022-01-31 18:22:21,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:21,129 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 596 transitions. [2022-01-31 18:22:21,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.0588235294117645) internal successors, (156), 50 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:21,130 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 596 transitions. [2022-01-31 18:22:21,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2022-01-31 18:22:21,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:21,131 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:21,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 18:22:21,132 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:21,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:21,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1745360534, now seen corresponding path program 48 times [2022-01-31 18:22:21,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:21,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068116024] [2022-01-31 18:22:21,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:21,136 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:21,136 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:21,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:21,141 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:22,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:22,045 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:22,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068116024] [2022-01-31 18:22:22,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1068116024] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:22,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:22,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 18:22:22,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977122795] [2022-01-31 18:22:22,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:22,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 18:22:22,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:22,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 18:22:22,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 18:22:22,047 INFO L87 Difference]: Start difference. First operand 450 states and 596 transitions. Second operand has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 51 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:23,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:23,722 INFO L93 Difference]: Finished difference Result 620 states and 775 transitions. [2022-01-31 18:22:23,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 18:22:23,722 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 51 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 398 [2022-01-31 18:22:23,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:23,724 INFO L225 Difference]: With dead ends: 620 [2022-01-31 18:22:23,724 INFO L226 Difference]: Without dead ends: 465 [2022-01-31 18:22:23,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 18:22:23,725 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1905 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1906 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:23,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1906 Valid, 50 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:22:23,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-01-31 18:22:23,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 459. [2022-01-31 18:22:23,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 453 states have (on average 1.3311258278145695) internal successors, (603), 453 states have internal predecessors, (603), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:23,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 608 transitions. [2022-01-31 18:22:23,814 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 608 transitions. Word has length 398 [2022-01-31 18:22:23,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:23,814 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 608 transitions. [2022-01-31 18:22:23,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 51 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:23,814 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 608 transitions. [2022-01-31 18:22:23,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2022-01-31 18:22:23,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:23,816 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:23,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 18:22:23,816 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:23,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:23,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1311388178, now seen corresponding path program 49 times [2022-01-31 18:22:23,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:23,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174106660] [2022-01-31 18:22:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:23,818 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:23,818 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:23,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:23,824 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:24,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:24,736 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:24,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174106660] [2022-01-31 18:22:24,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1174106660] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:24,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:24,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 18:22:24,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987022155] [2022-01-31 18:22:24,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:24,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 18:22:24,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:24,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 18:22:24,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 18:22:24,738 INFO L87 Difference]: Start difference. First operand 459 states and 608 transitions. Second operand has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 52 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:26,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:26,486 INFO L93 Difference]: Finished difference Result 632 states and 790 transitions. [2022-01-31 18:22:26,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 18:22:26,486 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 52 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 406 [2022-01-31 18:22:26,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:26,488 INFO L225 Difference]: With dead ends: 632 [2022-01-31 18:22:26,488 INFO L226 Difference]: Without dead ends: 474 [2022-01-31 18:22:26,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 18:22:26,489 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2052 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2053 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:26,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2053 Valid, 35 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:22:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-01-31 18:22:26,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 468. [2022-01-31 18:22:26,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 462 states have (on average 1.3311688311688312) internal successors, (615), 462 states have internal predecessors, (615), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:26,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 620 transitions. [2022-01-31 18:22:26,583 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 620 transitions. Word has length 406 [2022-01-31 18:22:26,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:26,583 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 620 transitions. [2022-01-31 18:22:26,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 52 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:26,583 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 620 transitions. [2022-01-31 18:22:26,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-01-31 18:22:26,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:26,584 INFO L514 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:26,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 18:22:26,585 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:26,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:26,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1114275478, now seen corresponding path program 50 times [2022-01-31 18:22:26,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:26,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607589497] [2022-01-31 18:22:26,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:26,587 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:26,587 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:26,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:26,593 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:27,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:27,516 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:27,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607589497] [2022-01-31 18:22:27,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1607589497] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:27,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:27,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 18:22:27,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439857741] [2022-01-31 18:22:27,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:27,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 18:22:27,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:27,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 18:22:27,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 18:22:27,528 INFO L87 Difference]: Start difference. First operand 468 states and 620 transitions. Second operand has 54 states, 54 states have (on average 3.0555555555555554) internal successors, (165), 53 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:29,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:29,325 INFO L93 Difference]: Finished difference Result 644 states and 805 transitions. [2022-01-31 18:22:29,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 18:22:29,326 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.0555555555555554) internal successors, (165), 53 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 414 [2022-01-31 18:22:29,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:29,327 INFO L225 Difference]: With dead ends: 644 [2022-01-31 18:22:29,327 INFO L226 Difference]: Without dead ends: 483 [2022-01-31 18:22:29,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 18:22:29,329 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1727 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:29,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1728 Valid, 55 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:22:29,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-01-31 18:22:29,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 477. [2022-01-31 18:22:29,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 471 states have (on average 1.3312101910828025) internal successors, (627), 471 states have internal predecessors, (627), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 632 transitions. [2022-01-31 18:22:29,433 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 632 transitions. Word has length 414 [2022-01-31 18:22:29,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:29,433 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 632 transitions. [2022-01-31 18:22:29,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.0555555555555554) internal successors, (165), 53 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 632 transitions. [2022-01-31 18:22:29,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-01-31 18:22:29,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:29,435 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:29,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 18:22:29,435 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:29,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:29,435 INFO L85 PathProgramCache]: Analyzing trace with hash -957805550, now seen corresponding path program 51 times [2022-01-31 18:22:29,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:29,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701350069] [2022-01-31 18:22:29,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:29,443 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:29,443 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:29,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:29,449 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:30,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:30,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:30,411 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 18:22:30,411 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:30,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701350069] [2022-01-31 18:22:30,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [701350069] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:30,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:30,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 18:22:30,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324147558] [2022-01-31 18:22:30,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:30,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 18:22:30,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:30,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 18:22:30,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 18:22:30,412 INFO L87 Difference]: Start difference. First operand 477 states and 632 transitions. Second operand has 55 states, 55 states have (on average 3.0545454545454547) internal successors, (168), 54 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:32,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:32,239 INFO L93 Difference]: Finished difference Result 656 states and 820 transitions. [2022-01-31 18:22:32,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 18:22:32,239 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.0545454545454547) internal successors, (168), 54 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 422 [2022-01-31 18:22:32,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:32,241 INFO L225 Difference]: With dead ends: 656 [2022-01-31 18:22:32,241 INFO L226 Difference]: Without dead ends: 492 [2022-01-31 18:22:32,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 18:22:32,242 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2218 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2219 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:32,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2219 Valid, 35 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:22:32,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-31 18:22:32,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 486. [2022-01-31 18:22:32,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 480 states have (on average 1.33125) internal successors, (639), 480 states have internal predecessors, (639), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:32,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 644 transitions. [2022-01-31 18:22:32,352 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 644 transitions. Word has length 422 [2022-01-31 18:22:32,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:32,353 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 644 transitions. [2022-01-31 18:22:32,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.0545454545454547) internal successors, (168), 54 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:32,353 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 644 transitions. [2022-01-31 18:22:32,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-01-31 18:22:32,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:32,354 INFO L514 BasicCegarLoop]: trace histogram [53, 52, 52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:32,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 18:22:32,354 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:32,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:32,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2013144726, now seen corresponding path program 52 times [2022-01-31 18:22:32,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:32,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605596309] [2022-01-31 18:22:32,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:32,357 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:32,357 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:32,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:32,363 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:33,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:33,455 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:33,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605596309] [2022-01-31 18:22:33,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [605596309] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:33,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:33,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 18:22:33,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576511716] [2022-01-31 18:22:33,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:33,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 18:22:33,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:33,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 18:22:33,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 18:22:33,457 INFO L87 Difference]: Start difference. First operand 486 states and 644 transitions. Second operand has 56 states, 56 states have (on average 3.0535714285714284) internal successors, (171), 55 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:35,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:35,345 INFO L93 Difference]: Finished difference Result 668 states and 835 transitions. [2022-01-31 18:22:35,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 18:22:35,346 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.0535714285714284) internal successors, (171), 55 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 430 [2022-01-31 18:22:35,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:35,347 INFO L225 Difference]: With dead ends: 668 [2022-01-31 18:22:35,347 INFO L226 Difference]: Without dead ends: 501 [2022-01-31 18:22:35,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 18:22:35,348 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2645 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2646 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:35,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2646 Valid, 40 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:22:35,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-01-31 18:22:35,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 495. [2022-01-31 18:22:35,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 489 states have (on average 1.3312883435582823) internal successors, (651), 489 states have internal predecessors, (651), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:35,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 656 transitions. [2022-01-31 18:22:35,453 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 656 transitions. Word has length 430 [2022-01-31 18:22:35,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:35,453 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 656 transitions. [2022-01-31 18:22:35,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.0535714285714284) internal successors, (171), 55 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:35,454 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 656 transitions. [2022-01-31 18:22:35,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-01-31 18:22:35,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:35,455 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:35,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 18:22:35,455 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:35,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:35,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1774377454, now seen corresponding path program 53 times [2022-01-31 18:22:35,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:35,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091459621] [2022-01-31 18:22:35,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:35,458 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:35,458 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:35,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:35,464 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:36,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:36,556 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:36,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091459621] [2022-01-31 18:22:36,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2091459621] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:36,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:36,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 18:22:36,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300368692] [2022-01-31 18:22:36,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:36,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 18:22:36,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:36,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 18:22:36,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 18:22:36,558 INFO L87 Difference]: Start difference. First operand 495 states and 656 transitions. Second operand has 57 states, 57 states have (on average 3.0526315789473686) internal successors, (174), 56 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:38,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:38,565 INFO L93 Difference]: Finished difference Result 680 states and 850 transitions. [2022-01-31 18:22:38,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 18:22:38,565 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.0526315789473686) internal successors, (174), 56 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 438 [2022-01-31 18:22:38,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:38,567 INFO L225 Difference]: With dead ends: 680 [2022-01-31 18:22:38,567 INFO L226 Difference]: Without dead ends: 510 [2022-01-31 18:22:38,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 18:22:38,568 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2128 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2129 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:38,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2129 Valid, 35 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:22:38,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-01-31 18:22:38,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 504. [2022-01-31 18:22:38,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 498 states have (on average 1.3313253012048192) internal successors, (663), 498 states have internal predecessors, (663), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:38,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 668 transitions. [2022-01-31 18:22:38,675 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 668 transitions. Word has length 438 [2022-01-31 18:22:38,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:38,675 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 668 transitions. [2022-01-31 18:22:38,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.0526315789473686) internal successors, (174), 56 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:38,675 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 668 transitions. [2022-01-31 18:22:38,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-01-31 18:22:38,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:38,676 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 54, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:38,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 18:22:38,677 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:38,677 INFO L85 PathProgramCache]: Analyzing trace with hash -139660950, now seen corresponding path program 54 times [2022-01-31 18:22:38,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:38,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599240970] [2022-01-31 18:22:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:38,681 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:38,681 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:38,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:38,687 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:39,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:39,715 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:39,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599240970] [2022-01-31 18:22:39,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [599240970] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:39,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:39,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 18:22:39,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609366818] [2022-01-31 18:22:39,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:39,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 18:22:39,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:39,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 18:22:39,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 18:22:39,717 INFO L87 Difference]: Start difference. First operand 504 states and 668 transitions. Second operand has 58 states, 58 states have (on average 3.0517241379310347) internal successors, (177), 57 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:41,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:41,760 INFO L93 Difference]: Finished difference Result 692 states and 865 transitions. [2022-01-31 18:22:41,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 18:22:41,760 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.0517241379310347) internal successors, (177), 57 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 446 [2022-01-31 18:22:41,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:41,762 INFO L225 Difference]: With dead ends: 692 [2022-01-31 18:22:41,762 INFO L226 Difference]: Without dead ends: 519 [2022-01-31 18:22:41,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 18:22:41,764 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2395 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2396 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:41,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2396 Valid, 50 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:22:41,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-01-31 18:22:41,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 513. [2022-01-31 18:22:41,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 507 states have (on average 1.331360946745562) internal successors, (675), 507 states have internal predecessors, (675), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:41,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 680 transitions. [2022-01-31 18:22:41,884 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 680 transitions. Word has length 446 [2022-01-31 18:22:41,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:41,884 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 680 transitions. [2022-01-31 18:22:41,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.0517241379310347) internal successors, (177), 57 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:41,884 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 680 transitions. [2022-01-31 18:22:41,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2022-01-31 18:22:41,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:41,886 INFO L514 BasicCegarLoop]: trace histogram [56, 55, 55, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:41,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 18:22:41,886 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:41,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:41,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1840676882, now seen corresponding path program 55 times [2022-01-31 18:22:41,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:41,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021221059] [2022-01-31 18:22:41,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:41,888 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:41,888 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:41,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:41,895 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:42,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:42,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:42,948 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:42,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021221059] [2022-01-31 18:22:42,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1021221059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:42,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:42,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 18:22:42,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639977803] [2022-01-31 18:22:42,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:42,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 18:22:42,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:42,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 18:22:42,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 18:22:42,950 INFO L87 Difference]: Start difference. First operand 513 states and 680 transitions. Second operand has 59 states, 59 states have (on average 3.0508474576271185) internal successors, (180), 58 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:45,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:45,053 INFO L93 Difference]: Finished difference Result 704 states and 880 transitions. [2022-01-31 18:22:45,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 18:22:45,053 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.0508474576271185) internal successors, (180), 58 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 454 [2022-01-31 18:22:45,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:45,054 INFO L225 Difference]: With dead ends: 704 [2022-01-31 18:22:45,055 INFO L226 Difference]: Without dead ends: 528 [2022-01-31 18:22:45,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 18:22:45,056 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2374 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2375 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:45,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2375 Valid, 35 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:22:45,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-01-31 18:22:45,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 522. [2022-01-31 18:22:45,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 516 states have (on average 1.3313953488372092) internal successors, (687), 516 states have internal predecessors, (687), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 692 transitions. [2022-01-31 18:22:45,174 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 692 transitions. Word has length 454 [2022-01-31 18:22:45,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:45,174 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 692 transitions. [2022-01-31 18:22:45,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.0508474576271185) internal successors, (180), 58 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:45,175 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 692 transitions. [2022-01-31 18:22:45,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2022-01-31 18:22:45,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:45,176 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 56, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:45,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 18:22:45,176 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:45,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:45,177 INFO L85 PathProgramCache]: Analyzing trace with hash -116995734, now seen corresponding path program 56 times [2022-01-31 18:22:45,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:45,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581132160] [2022-01-31 18:22:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:45,179 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:45,179 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:45,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:45,186 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:46,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:46,287 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:46,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581132160] [2022-01-31 18:22:46,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [581132160] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:46,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:46,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 18:22:46,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652835130] [2022-01-31 18:22:46,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:46,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 18:22:46,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:46,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 18:22:46,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 18:22:46,289 INFO L87 Difference]: Start difference. First operand 522 states and 692 transitions. Second operand has 60 states, 60 states have (on average 3.05) internal successors, (183), 59 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:48,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:48,451 INFO L93 Difference]: Finished difference Result 716 states and 895 transitions. [2022-01-31 18:22:48,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 18:22:48,452 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.05) internal successors, (183), 59 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 462 [2022-01-31 18:22:48,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:48,453 INFO L225 Difference]: With dead ends: 716 [2022-01-31 18:22:48,453 INFO L226 Difference]: Without dead ends: 537 [2022-01-31 18:22:48,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 18:22:48,454 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2769 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2770 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:48,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2770 Valid, 40 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:22:48,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-01-31 18:22:48,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 531. [2022-01-31 18:22:48,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 525 states have (on average 1.3314285714285714) internal successors, (699), 525 states have internal predecessors, (699), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:48,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 704 transitions. [2022-01-31 18:22:48,571 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 704 transitions. Word has length 462 [2022-01-31 18:22:48,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:48,571 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 704 transitions. [2022-01-31 18:22:48,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.05) internal successors, (183), 59 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:48,571 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 704 transitions. [2022-01-31 18:22:48,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-01-31 18:22:48,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:48,573 INFO L514 BasicCegarLoop]: trace histogram [58, 57, 57, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:48,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 18:22:48,573 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:48,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:48,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1830479342, now seen corresponding path program 57 times [2022-01-31 18:22:48,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:48,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105768175] [2022-01-31 18:22:48,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:48,576 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:48,576 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:48,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:48,583 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:49,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:49,766 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:49,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105768175] [2022-01-31 18:22:49,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [105768175] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:49,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:49,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 18:22:49,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818969837] [2022-01-31 18:22:49,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:49,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 18:22:49,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:49,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 18:22:49,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 18:22:49,768 INFO L87 Difference]: Start difference. First operand 531 states and 704 transitions. Second operand has 61 states, 61 states have (on average 3.0491803278688523) internal successors, (186), 60 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:52,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:52,029 INFO L93 Difference]: Finished difference Result 728 states and 910 transitions. [2022-01-31 18:22:52,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 18:22:52,030 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.0491803278688523) internal successors, (186), 60 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 470 [2022-01-31 18:22:52,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:52,031 INFO L225 Difference]: With dead ends: 728 [2022-01-31 18:22:52,031 INFO L226 Difference]: Without dead ends: 546 [2022-01-31 18:22:52,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 18:22:52,033 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2204 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2205 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:52,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2205 Valid, 45 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:22:52,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-31 18:22:52,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 540. [2022-01-31 18:22:52,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 534 states have (on average 1.3314606741573034) internal successors, (711), 534 states have internal predecessors, (711), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:52,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 716 transitions. [2022-01-31 18:22:52,170 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 716 transitions. Word has length 470 [2022-01-31 18:22:52,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:52,171 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 716 transitions. [2022-01-31 18:22:52,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.0491803278688523) internal successors, (186), 60 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:52,171 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 716 transitions. [2022-01-31 18:22:52,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-01-31 18:22:52,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:52,172 INFO L514 BasicCegarLoop]: trace histogram [59, 58, 58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:52,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 18:22:52,173 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:52,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:52,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1686069610, now seen corresponding path program 58 times [2022-01-31 18:22:52,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:52,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185277274] [2022-01-31 18:22:52,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:52,175 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:52,175 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:52,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:52,183 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:53,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:53,373 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:53,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185277274] [2022-01-31 18:22:53,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1185277274] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:53,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:53,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 18:22:53,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502156656] [2022-01-31 18:22:53,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:53,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 18:22:53,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:53,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 18:22:53,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 18:22:53,375 INFO L87 Difference]: Start difference. First operand 540 states and 716 transitions. Second operand has 62 states, 62 states have (on average 3.0483870967741935) internal successors, (189), 61 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:55,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:55,671 INFO L93 Difference]: Finished difference Result 740 states and 925 transitions. [2022-01-31 18:22:55,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 18:22:55,672 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.0483870967741935) internal successors, (189), 61 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 478 [2022-01-31 18:22:55,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:55,673 INFO L225 Difference]: With dead ends: 740 [2022-01-31 18:22:55,674 INFO L226 Difference]: Without dead ends: 555 [2022-01-31 18:22:55,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 18:22:55,675 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2135 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2136 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:55,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2136 Valid, 50 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:22:55,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-01-31 18:22:55,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 549. [2022-01-31 18:22:55,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 543 states have (on average 1.3314917127071824) internal successors, (723), 543 states have internal predecessors, (723), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:55,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 728 transitions. [2022-01-31 18:22:55,810 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 728 transitions. Word has length 478 [2022-01-31 18:22:55,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:55,810 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 728 transitions. [2022-01-31 18:22:55,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.0483870967741935) internal successors, (189), 61 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:55,811 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 728 transitions. [2022-01-31 18:22:55,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2022-01-31 18:22:55,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:55,812 INFO L514 BasicCegarLoop]: trace histogram [60, 59, 59, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:55,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 18:22:55,812 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:55,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:55,813 INFO L85 PathProgramCache]: Analyzing trace with hash -547818478, now seen corresponding path program 59 times [2022-01-31 18:22:55,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:55,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241178234] [2022-01-31 18:22:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:55,815 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:55,815 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:55,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:55,823 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:57,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:57,019 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:57,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241178234] [2022-01-31 18:22:57,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1241178234] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:57,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:57,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 18:22:57,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825043946] [2022-01-31 18:22:57,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:57,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 18:22:57,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:57,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 18:22:57,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 18:22:57,020 INFO L87 Difference]: Start difference. First operand 549 states and 728 transitions. Second operand has 63 states, 63 states have (on average 3.0476190476190474) internal successors, (192), 62 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:59,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:59,397 INFO L93 Difference]: Finished difference Result 752 states and 940 transitions. [2022-01-31 18:22:59,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 18:22:59,397 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.0476190476190474) internal successors, (192), 62 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 486 [2022-01-31 18:22:59,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:59,399 INFO L225 Difference]: With dead ends: 752 [2022-01-31 18:22:59,399 INFO L226 Difference]: Without dead ends: 564 [2022-01-31 18:22:59,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 18:22:59,400 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2850 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2851 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:59,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2851 Valid, 40 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:22:59,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-01-31 18:22:59,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2022-01-31 18:22:59,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 552 states have (on average 1.3315217391304348) internal successors, (735), 552 states have internal predecessors, (735), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:59,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 740 transitions. [2022-01-31 18:22:59,539 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 740 transitions. Word has length 486 [2022-01-31 18:22:59,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:59,539 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 740 transitions. [2022-01-31 18:22:59,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.0476190476190474) internal successors, (192), 62 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:59,539 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 740 transitions. [2022-01-31 18:22:59,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2022-01-31 18:22:59,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:59,541 INFO L514 BasicCegarLoop]: trace histogram [61, 60, 60, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:59,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 18:22:59,541 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:59,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:59,541 INFO L85 PathProgramCache]: Analyzing trace with hash -24725142, now seen corresponding path program 60 times [2022-01-31 18:22:59,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:59,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399863034] [2022-01-31 18:22:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:59,543 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:59,543 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:59,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:59,551 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:00,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:00,770 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 18:23:00,770 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:00,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399863034] [2022-01-31 18:23:00,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [399863034] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:00,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:00,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 18:23:00,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147230903] [2022-01-31 18:23:00,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:00,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 18:23:00,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:00,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 18:23:00,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 18:23:00,772 INFO L87 Difference]: Start difference. First operand 558 states and 740 transitions. Second operand has 64 states, 64 states have (on average 3.046875) internal successors, (195), 63 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:03,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:03,313 INFO L93 Difference]: Finished difference Result 764 states and 955 transitions. [2022-01-31 18:23:03,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 18:23:03,313 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.046875) internal successors, (195), 63 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 494 [2022-01-31 18:23:03,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:03,315 INFO L225 Difference]: With dead ends: 764 [2022-01-31 18:23:03,315 INFO L226 Difference]: Without dead ends: 573 [2022-01-31 18:23:03,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 18:23:03,316 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2589 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2590 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:03,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2590 Valid, 30 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:23:03,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-01-31 18:23:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 567. [2022-01-31 18:23:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 561 states have (on average 1.3315508021390374) internal successors, (747), 561 states have internal predecessors, (747), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:23:03,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 752 transitions. [2022-01-31 18:23:03,461 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 752 transitions. Word has length 494 [2022-01-31 18:23:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:03,461 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 752 transitions. [2022-01-31 18:23:03,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.046875) internal successors, (195), 63 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:03,461 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 752 transitions. [2022-01-31 18:23:03,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2022-01-31 18:23:03,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:03,463 INFO L514 BasicCegarLoop]: trace histogram [62, 61, 61, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:03,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 18:23:03,463 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:03,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:03,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1063121390, now seen corresponding path program 61 times [2022-01-31 18:23:03,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:03,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197329570] [2022-01-31 18:23:03,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:03,466 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:03,466 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:23:03,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:03,474 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:04,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:04,762 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:04,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197329570] [2022-01-31 18:23:04,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [197329570] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:04,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:04,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 18:23:04,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549137780] [2022-01-31 18:23:04,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:04,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 18:23:04,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:04,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 18:23:04,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 18:23:04,764 INFO L87 Difference]: Start difference. First operand 567 states and 752 transitions. Second operand has 65 states, 65 states have (on average 3.046153846153846) internal successors, (198), 64 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:07,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:07,422 INFO L93 Difference]: Finished difference Result 776 states and 970 transitions. [2022-01-31 18:23:07,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 18:23:07,423 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.046153846153846) internal successors, (198), 64 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 502 [2022-01-31 18:23:07,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:07,424 INFO L225 Difference]: With dead ends: 776 [2022-01-31 18:23:07,424 INFO L226 Difference]: Without dead ends: 582 [2022-01-31 18:23:07,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 18:23:07,425 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3144 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3145 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:07,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3145 Valid, 40 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:23:07,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-01-31 18:23:07,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 576. [2022-01-31 18:23:07,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 570 states have (on average 1.331578947368421) internal successors, (759), 570 states have internal predecessors, (759), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:23:07,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 764 transitions. [2022-01-31 18:23:07,565 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 764 transitions. Word has length 502 [2022-01-31 18:23:07,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:07,566 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 764 transitions. [2022-01-31 18:23:07,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.046153846153846) internal successors, (198), 64 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:07,566 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 764 transitions. [2022-01-31 18:23:07,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2022-01-31 18:23:07,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:07,568 INFO L514 BasicCegarLoop]: trace histogram [63, 62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:07,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 18:23:07,568 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:07,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:07,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2005717354, now seen corresponding path program 62 times [2022-01-31 18:23:07,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:07,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322856747] [2022-01-31 18:23:07,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:07,570 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:07,570 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:23:07,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:07,578 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:08,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:08,916 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:08,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322856747] [2022-01-31 18:23:08,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1322856747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:08,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:08,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 18:23:08,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596442014] [2022-01-31 18:23:08,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:08,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 18:23:08,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:08,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 18:23:08,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 18:23:08,918 INFO L87 Difference]: Start difference. First operand 576 states and 764 transitions. Second operand has 66 states, 66 states have (on average 3.0454545454545454) internal successors, (201), 65 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:11,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:11,743 INFO L93 Difference]: Finished difference Result 788 states and 985 transitions. [2022-01-31 18:23:11,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 18:23:11,743 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.0454545454545454) internal successors, (201), 65 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 510 [2022-01-31 18:23:11,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:11,745 INFO L225 Difference]: With dead ends: 788 [2022-01-31 18:23:11,745 INFO L226 Difference]: Without dead ends: 591 [2022-01-31 18:23:11,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 18:23:11,746 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2291 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2292 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:11,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2292 Valid, 55 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:23:11,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-01-31 18:23:11,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 585. [2022-01-31 18:23:11,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 579 states have (on average 1.3316062176165804) internal successors, (771), 579 states have internal predecessors, (771), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:23:11,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 776 transitions. [2022-01-31 18:23:11,899 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 776 transitions. Word has length 510 [2022-01-31 18:23:11,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:11,900 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 776 transitions. [2022-01-31 18:23:11,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.0454545454545454) internal successors, (201), 65 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:11,900 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 776 transitions. [2022-01-31 18:23:11,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2022-01-31 18:23:11,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:11,902 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:11,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 18:23:11,902 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:11,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:11,902 INFO L85 PathProgramCache]: Analyzing trace with hash 944793618, now seen corresponding path program 63 times [2022-01-31 18:23:11,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:11,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711372609] [2022-01-31 18:23:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:11,904 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:11,904 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:23:11,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:11,913 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:13,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:13,354 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:13,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711372609] [2022-01-31 18:23:13,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1711372609] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:13,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:13,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 18:23:13,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589151382] [2022-01-31 18:23:13,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:13,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 18:23:13,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:13,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 18:23:13,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 18:23:13,356 INFO L87 Difference]: Start difference. First operand 585 states and 776 transitions. Second operand has 67 states, 67 states have (on average 3.044776119402985) internal successors, (204), 66 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:16,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:16,185 INFO L93 Difference]: Finished difference Result 800 states and 1000 transitions. [2022-01-31 18:23:16,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 18:23:16,185 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.044776119402985) internal successors, (204), 66 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 518 [2022-01-31 18:23:16,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:16,187 INFO L225 Difference]: With dead ends: 800 [2022-01-31 18:23:16,187 INFO L226 Difference]: Without dead ends: 600 [2022-01-31 18:23:16,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 18:23:16,188 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2542 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2543 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:16,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2543 Valid, 50 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:23:16,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-01-31 18:23:16,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 594. [2022-01-31 18:23:16,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 588 states have (on average 1.3316326530612246) internal successors, (783), 588 states have internal predecessors, (783), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:23:16,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 788 transitions. [2022-01-31 18:23:16,338 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 788 transitions. Word has length 518 [2022-01-31 18:23:16,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:16,338 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 788 transitions. [2022-01-31 18:23:16,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.044776119402985) internal successors, (204), 66 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:16,338 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 788 transitions. [2022-01-31 18:23:16,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2022-01-31 18:23:16,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:16,340 INFO L514 BasicCegarLoop]: trace histogram [65, 64, 64, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:16,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 18:23:16,340 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:16,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:16,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1812048234, now seen corresponding path program 64 times [2022-01-31 18:23:16,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:16,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863938613] [2022-01-31 18:23:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:16,343 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:16,343 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:23:16,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:16,352 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:17,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:17,823 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:17,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863938613] [2022-01-31 18:23:17,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [863938613] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:17,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:17,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 18:23:17,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437917718] [2022-01-31 18:23:17,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:17,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 18:23:17,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:17,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 18:23:17,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 18:23:17,826 INFO L87 Difference]: Start difference. First operand 594 states and 788 transitions. Second operand has 68 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 67 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:20,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:20,724 INFO L93 Difference]: Finished difference Result 812 states and 1015 transitions. [2022-01-31 18:23:20,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 18:23:20,725 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 67 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 526 [2022-01-31 18:23:20,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:20,726 INFO L225 Difference]: With dead ends: 812 [2022-01-31 18:23:20,726 INFO L226 Difference]: Without dead ends: 609 [2022-01-31 18:23:20,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 18:23:20,728 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2689 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2690 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:20,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2690 Valid, 35 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:23:20,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-01-31 18:23:20,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 603. [2022-01-31 18:23:20,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 597 states have (on average 1.3316582914572865) internal successors, (795), 597 states have internal predecessors, (795), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:23:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 800 transitions. [2022-01-31 18:23:20,902 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 800 transitions. Word has length 526 [2022-01-31 18:23:20,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:20,902 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 800 transitions. [2022-01-31 18:23:20,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 67 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:20,903 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 800 transitions. [2022-01-31 18:23:20,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2022-01-31 18:23:20,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:20,905 INFO L514 BasicCegarLoop]: trace histogram [66, 65, 65, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:20,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 18:23:20,905 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:20,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:20,905 INFO L85 PathProgramCache]: Analyzing trace with hash -604765678, now seen corresponding path program 65 times [2022-01-31 18:23:20,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:20,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895586814] [2022-01-31 18:23:20,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:20,907 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:20,907 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:23:20,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:20,916 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:22,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:22,443 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:22,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895586814] [2022-01-31 18:23:22,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1895586814] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:22,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:22,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 18:23:22,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348649543] [2022-01-31 18:23:22,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:22,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 18:23:22,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:22,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 18:23:22,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 18:23:22,445 INFO L87 Difference]: Start difference. First operand 603 states and 800 transitions. Second operand has 69 states, 69 states have (on average 3.0434782608695654) internal successors, (210), 68 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:25,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:25,543 INFO L93 Difference]: Finished difference Result 824 states and 1030 transitions. [2022-01-31 18:23:25,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 18:23:25,543 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.0434782608695654) internal successors, (210), 68 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 534 [2022-01-31 18:23:25,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:25,545 INFO L225 Difference]: With dead ends: 824 [2022-01-31 18:23:25,545 INFO L226 Difference]: Without dead ends: 618 [2022-01-31 18:23:25,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 18:23:25,546 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2436 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2437 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:25,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2437 Valid, 65 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:23:25,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-01-31 18:23:25,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 612. [2022-01-31 18:23:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 606 states have (on average 1.3316831683168318) internal successors, (807), 606 states have internal predecessors, (807), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:23:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 812 transitions. [2022-01-31 18:23:25,718 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 812 transitions. Word has length 534 [2022-01-31 18:23:25,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:25,718 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 812 transitions. [2022-01-31 18:23:25,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.0434782608695654) internal successors, (210), 68 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:25,718 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 812 transitions. [2022-01-31 18:23:25,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2022-01-31 18:23:25,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:25,721 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:25,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 18:23:25,721 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:25,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:25,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1683308906, now seen corresponding path program 66 times [2022-01-31 18:23:25,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:25,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381676051] [2022-01-31 18:23:25,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:25,724 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:25,724 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:23:25,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:25,734 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:27,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:27,289 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:27,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381676051] [2022-01-31 18:23:27,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1381676051] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:27,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:27,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 18:23:27,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465793101] [2022-01-31 18:23:27,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:27,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 18:23:27,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:27,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 18:23:27,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 18:23:27,291 INFO L87 Difference]: Start difference. First operand 612 states and 812 transitions. Second operand has 70 states, 70 states have (on average 3.0428571428571427) internal successors, (213), 69 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:30,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:30,359 INFO L93 Difference]: Finished difference Result 836 states and 1045 transitions. [2022-01-31 18:23:30,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 18:23:30,360 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.0428571428571427) internal successors, (213), 69 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 542 [2022-01-31 18:23:30,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:30,361 INFO L225 Difference]: With dead ends: 836 [2022-01-31 18:23:30,362 INFO L226 Difference]: Without dead ends: 627 [2022-01-31 18:23:30,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 18:23:30,364 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2455 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2456 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:30,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2456 Valid, 65 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:23:30,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-01-31 18:23:30,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 621. [2022-01-31 18:23:30,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 615 states have (on average 1.3317073170731708) internal successors, (819), 615 states have internal predecessors, (819), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:23:30,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 824 transitions. [2022-01-31 18:23:30,560 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 824 transitions. Word has length 542 [2022-01-31 18:23:30,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:30,561 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 824 transitions. [2022-01-31 18:23:30,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.0428571428571427) internal successors, (213), 69 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:30,561 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 824 transitions. [2022-01-31 18:23:30,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2022-01-31 18:23:30,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:30,563 INFO L514 BasicCegarLoop]: trace histogram [68, 67, 67, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:30,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 18:23:30,563 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:30,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:30,563 INFO L85 PathProgramCache]: Analyzing trace with hash -719528942, now seen corresponding path program 67 times [2022-01-31 18:23:30,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:30,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919265552] [2022-01-31 18:23:30,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:30,566 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:30,566 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:23:30,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:30,578 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:32,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:32,133 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:32,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919265552] [2022-01-31 18:23:32,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1919265552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:32,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:32,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 18:23:32,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870997547] [2022-01-31 18:23:32,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:32,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 18:23:32,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:32,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 18:23:32,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 18:23:32,135 INFO L87 Difference]: Start difference. First operand 621 states and 824 transitions. Second operand has 71 states, 71 states have (on average 3.0422535211267605) internal successors, (216), 70 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:35,319 INFO L93 Difference]: Finished difference Result 848 states and 1060 transitions. [2022-01-31 18:23:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 18:23:35,319 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.0422535211267605) internal successors, (216), 70 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 550 [2022-01-31 18:23:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:35,321 INFO L225 Difference]: With dead ends: 848 [2022-01-31 18:23:35,321 INFO L226 Difference]: Without dead ends: 636 [2022-01-31 18:23:35,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 18:23:35,323 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2850 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2851 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:35,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2851 Valid, 40 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:23:35,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-01-31 18:23:35,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 630. [2022-01-31 18:23:35,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 624 states have (on average 1.3317307692307692) internal successors, (831), 624 states have internal predecessors, (831), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:23:35,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 836 transitions. [2022-01-31 18:23:35,516 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 836 transitions. Word has length 550 [2022-01-31 18:23:35,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:35,516 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 836 transitions. [2022-01-31 18:23:35,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.0422535211267605) internal successors, (216), 70 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:35,516 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 836 transitions. [2022-01-31 18:23:35,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2022-01-31 18:23:35,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:35,518 INFO L514 BasicCegarLoop]: trace histogram [69, 68, 68, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:35,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 18:23:35,518 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:35,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:35,519 INFO L85 PathProgramCache]: Analyzing trace with hash -721970838, now seen corresponding path program 68 times [2022-01-31 18:23:35,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:35,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763270030] [2022-01-31 18:23:35,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:35,521 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:35,521 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:23:35,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:35,531 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:37,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:37,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:37,186 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:37,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763270030] [2022-01-31 18:23:37,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1763270030] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:37,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:37,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 18:23:37,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952924874] [2022-01-31 18:23:37,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:37,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 18:23:37,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:37,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 18:23:37,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 18:23:37,188 INFO L87 Difference]: Start difference. First operand 630 states and 836 transitions. Second operand has 72 states, 72 states have (on average 3.0416666666666665) internal successors, (219), 71 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:40,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:40,460 INFO L93 Difference]: Finished difference Result 860 states and 1075 transitions. [2022-01-31 18:23:40,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 18:23:40,460 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.0416666666666665) internal successors, (219), 71 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 558 [2022-01-31 18:23:40,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:40,462 INFO L225 Difference]: With dead ends: 860 [2022-01-31 18:23:40,462 INFO L226 Difference]: Without dead ends: 645 [2022-01-31 18:23:40,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 18:23:40,464 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2805 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2806 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:40,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2806 Valid, 45 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:23:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-31 18:23:40,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 639. [2022-01-31 18:23:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 633 states have (on average 1.3317535545023698) internal successors, (843), 633 states have internal predecessors, (843), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:23:40,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 848 transitions. [2022-01-31 18:23:40,649 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 848 transitions. Word has length 558 [2022-01-31 18:23:40,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:40,650 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 848 transitions. [2022-01-31 18:23:40,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.0416666666666665) internal successors, (219), 71 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 848 transitions. [2022-01-31 18:23:40,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2022-01-31 18:23:40,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:40,653 INFO L514 BasicCegarLoop]: trace histogram [70, 69, 69, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:40,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 18:23:40,653 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:40,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:40,653 INFO L85 PathProgramCache]: Analyzing trace with hash -514132462, now seen corresponding path program 69 times [2022-01-31 18:23:40,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:40,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119298492] [2022-01-31 18:23:40,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:40,656 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:40,656 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:23:40,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:40,674 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:42,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:42,291 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:42,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119298492] [2022-01-31 18:23:42,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2119298492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:42,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:42,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 18:23:42,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978697704] [2022-01-31 18:23:42,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:42,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 18:23:42,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:42,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 18:23:42,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:23:42,293 INFO L87 Difference]: Start difference. First operand 639 states and 848 transitions. Second operand has 73 states, 73 states have (on average 3.041095890410959) internal successors, (222), 72 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:45,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:45,658 INFO L93 Difference]: Finished difference Result 872 states and 1090 transitions. [2022-01-31 18:23:45,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 18:23:45,658 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.041095890410959) internal successors, (222), 72 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 566 [2022-01-31 18:23:45,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:45,660 INFO L225 Difference]: With dead ends: 872 [2022-01-31 18:23:45,660 INFO L226 Difference]: Without dead ends: 654 [2022-01-31 18:23:45,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 18:23:45,662 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3640 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3641 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:45,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3641 Valid, 40 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:23:45,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-01-31 18:23:45,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 648. [2022-01-31 18:23:45,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 642 states have (on average 1.3317757009345794) internal successors, (855), 642 states have internal predecessors, (855), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:23:45,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 860 transitions. [2022-01-31 18:23:45,874 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 860 transitions. Word has length 566 [2022-01-31 18:23:45,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:45,875 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 860 transitions. [2022-01-31 18:23:45,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.041095890410959) internal successors, (222), 72 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:45,875 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 860 transitions. [2022-01-31 18:23:45,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2022-01-31 18:23:45,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:45,877 INFO L514 BasicCegarLoop]: trace histogram [71, 70, 70, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:45,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 18:23:45,877 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:45,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:45,877 INFO L85 PathProgramCache]: Analyzing trace with hash 509129066, now seen corresponding path program 70 times [2022-01-31 18:23:45,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:45,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418258643] [2022-01-31 18:23:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:45,880 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:45,880 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:23:45,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:45,891 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:45,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:47,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:47,585 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:47,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418258643] [2022-01-31 18:23:47,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1418258643] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:47,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:47,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 18:23:47,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627906030] [2022-01-31 18:23:47,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:47,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 18:23:47,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:47,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 18:23:47,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 18:23:47,587 INFO L87 Difference]: Start difference. First operand 648 states and 860 transitions. Second operand has 74 states, 74 states have (on average 3.0405405405405403) internal successors, (225), 73 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:51,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:51,027 INFO L93 Difference]: Finished difference Result 884 states and 1105 transitions. [2022-01-31 18:23:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 18:23:51,027 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.0405405405405403) internal successors, (225), 73 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 574 [2022-01-31 18:23:51,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:51,029 INFO L225 Difference]: With dead ends: 884 [2022-01-31 18:23:51,029 INFO L226 Difference]: Without dead ends: 663 [2022-01-31 18:23:51,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 18:23:51,031 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2619 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2620 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:51,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2620 Valid, 55 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:23:51,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-01-31 18:23:51,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 657. [2022-01-31 18:23:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 651 states have (on average 1.3317972350230414) internal successors, (867), 651 states have internal predecessors, (867), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:23:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 872 transitions. [2022-01-31 18:23:51,254 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 872 transitions. Word has length 574 [2022-01-31 18:23:51,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:51,255 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 872 transitions. [2022-01-31 18:23:51,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.0405405405405403) internal successors, (225), 73 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:51,255 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 872 transitions. [2022-01-31 18:23:51,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2022-01-31 18:23:51,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:51,257 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:51,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 18:23:51,257 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:51,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:51,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1379815442, now seen corresponding path program 71 times [2022-01-31 18:23:51,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:51,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912311342] [2022-01-31 18:23:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:51,260 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:51,260 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:23:51,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:51,273 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:53,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:53,002 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:53,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912311342] [2022-01-31 18:23:53,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [912311342] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:53,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:53,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 18:23:53,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039948917] [2022-01-31 18:23:53,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:53,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 18:23:53,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:53,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 18:23:53,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 18:23:53,005 INFO L87 Difference]: Start difference. First operand 657 states and 872 transitions. Second operand has 75 states, 75 states have (on average 3.04) internal successors, (228), 74 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:56,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:56,641 INFO L93 Difference]: Finished difference Result 896 states and 1120 transitions. [2022-01-31 18:23:56,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 18:23:56,642 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.04) internal successors, (228), 74 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 582 [2022-01-31 18:23:56,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:56,644 INFO L225 Difference]: With dead ends: 896 [2022-01-31 18:23:56,644 INFO L226 Difference]: Without dead ends: 672 [2022-01-31 18:23:56,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 18:23:56,645 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2774 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2775 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:56,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2775 Valid, 40 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:23:56,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-01-31 18:23:56,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 666. [2022-01-31 18:23:56,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 660 states have (on average 1.3318181818181818) internal successors, (879), 660 states have internal predecessors, (879), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:23:56,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 884 transitions. [2022-01-31 18:23:56,848 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 884 transitions. Word has length 582 [2022-01-31 18:23:56,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:56,848 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 884 transitions. [2022-01-31 18:23:56,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.04) internal successors, (228), 74 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:56,848 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 884 transitions. [2022-01-31 18:23:56,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2022-01-31 18:23:56,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:56,851 INFO L514 BasicCegarLoop]: trace histogram [73, 72, 72, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:56,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 18:23:56,851 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:56,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:56,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1930917526, now seen corresponding path program 72 times [2022-01-31 18:23:56,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:56,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640612119] [2022-01-31 18:23:56,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:56,853 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:56,853 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:23:56,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:56,865 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:58,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:58,625 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:58,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640612119] [2022-01-31 18:23:58,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [640612119] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:58,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:58,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 18:23:58,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603694313] [2022-01-31 18:23:58,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:58,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 18:23:58,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:58,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 18:23:58,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 18:23:58,627 INFO L87 Difference]: Start difference. First operand 666 states and 884 transitions. Second operand has 76 states, 76 states have (on average 3.039473684210526) internal successors, (231), 75 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:02,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:02,245 INFO L93 Difference]: Finished difference Result 908 states and 1135 transitions. [2022-01-31 18:24:02,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 18:24:02,245 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.039473684210526) internal successors, (231), 75 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 590 [2022-01-31 18:24:02,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:02,247 INFO L225 Difference]: With dead ends: 908 [2022-01-31 18:24:02,247 INFO L226 Difference]: Without dead ends: 681 [2022-01-31 18:24:02,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 18:24:02,249 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3425 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3426 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:02,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3426 Valid, 45 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:24:02,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-01-31 18:24:02,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 675. [2022-01-31 18:24:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 669 states have (on average 1.3318385650224216) internal successors, (891), 669 states have internal predecessors, (891), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 896 transitions. [2022-01-31 18:24:02,479 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 896 transitions. Word has length 590 [2022-01-31 18:24:02,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:02,479 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 896 transitions. [2022-01-31 18:24:02,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.039473684210526) internal successors, (231), 75 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:02,479 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 896 transitions. [2022-01-31 18:24:02,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2022-01-31 18:24:02,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:02,481 INFO L514 BasicCegarLoop]: trace histogram [74, 73, 73, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:02,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 18:24:02,481 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:02,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:02,482 INFO L85 PathProgramCache]: Analyzing trace with hash 223799826, now seen corresponding path program 73 times [2022-01-31 18:24:02,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:02,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434290507] [2022-01-31 18:24:02,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:02,484 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:02,484 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:02,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:02,497 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:04,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:04,332 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 18:24:04,332 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:04,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434290507] [2022-01-31 18:24:04,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [434290507] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:04,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:04,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 18:24:04,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954012460] [2022-01-31 18:24:04,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:04,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 18:24:04,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:04,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 18:24:04,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 18:24:04,335 INFO L87 Difference]: Start difference. First operand 675 states and 896 transitions. Second operand has 77 states, 77 states have (on average 3.038961038961039) internal successors, (234), 76 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:08,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:08,147 INFO L93 Difference]: Finished difference Result 920 states and 1150 transitions. [2022-01-31 18:24:08,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 18:24:08,147 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.038961038961039) internal successors, (234), 76 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 598 [2022-01-31 18:24:08,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:08,149 INFO L225 Difference]: With dead ends: 920 [2022-01-31 18:24:08,150 INFO L226 Difference]: Without dead ends: 690 [2022-01-31 18:24:08,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 18:24:08,151 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3324 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3325 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:08,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3325 Valid, 35 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:24:08,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-01-31 18:24:08,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 684. [2022-01-31 18:24:08,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 678 states have (on average 1.331858407079646) internal successors, (903), 678 states have internal predecessors, (903), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:08,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 908 transitions. [2022-01-31 18:24:08,366 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 908 transitions. Word has length 598 [2022-01-31 18:24:08,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:08,367 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 908 transitions. [2022-01-31 18:24:08,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.038961038961039) internal successors, (234), 76 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:08,367 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 908 transitions. [2022-01-31 18:24:08,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2022-01-31 18:24:08,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:08,370 INFO L514 BasicCegarLoop]: trace histogram [75, 74, 74, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:08,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 18:24:08,370 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:08,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:08,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1494688106, now seen corresponding path program 74 times [2022-01-31 18:24:08,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:08,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787134933] [2022-01-31 18:24:08,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:08,374 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:08,375 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:08,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:08,388 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:08,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:10,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:10,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:10,244 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:10,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787134933] [2022-01-31 18:24:10,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [787134933] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:10,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:10,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 18:24:10,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860504888] [2022-01-31 18:24:10,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:10,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 18:24:10,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:10,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 18:24:10,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 18:24:10,246 INFO L87 Difference]: Start difference. First operand 684 states and 908 transitions. Second operand has 78 states, 78 states have (on average 3.0384615384615383) internal successors, (237), 77 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:14,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:14,070 INFO L93 Difference]: Finished difference Result 932 states and 1165 transitions. [2022-01-31 18:24:14,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 18:24:14,070 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.0384615384615383) internal successors, (237), 77 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 606 [2022-01-31 18:24:14,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:14,072 INFO L225 Difference]: With dead ends: 932 [2022-01-31 18:24:14,073 INFO L226 Difference]: Without dead ends: 699 [2022-01-31 18:24:14,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 18:24:14,074 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3231 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3232 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:14,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3232 Valid, 45 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:24:14,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-01-31 18:24:14,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 693. [2022-01-31 18:24:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 687 states have (on average 1.331877729257642) internal successors, (915), 687 states have internal predecessors, (915), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 920 transitions. [2022-01-31 18:24:14,299 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 920 transitions. Word has length 606 [2022-01-31 18:24:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:14,299 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 920 transitions. [2022-01-31 18:24:14,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.0384615384615383) internal successors, (237), 77 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:14,299 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 920 transitions. [2022-01-31 18:24:14,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2022-01-31 18:24:14,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:14,302 INFO L514 BasicCegarLoop]: trace histogram [76, 75, 75, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:14,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 18:24:14,302 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:14,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:14,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1942698990, now seen corresponding path program 75 times [2022-01-31 18:24:14,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:14,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285795914] [2022-01-31 18:24:14,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:14,304 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:14,304 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:14,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:14,316 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:16,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:16,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:16,202 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:16,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285795914] [2022-01-31 18:24:16,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1285795914] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:16,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:16,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 18:24:16,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585040941] [2022-01-31 18:24:16,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:16,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 18:24:16,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:16,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 18:24:16,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 18:24:16,204 INFO L87 Difference]: Start difference. First operand 693 states and 920 transitions. Second operand has 79 states, 79 states have (on average 3.037974683544304) internal successors, (240), 78 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:20,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:20,183 INFO L93 Difference]: Finished difference Result 944 states and 1180 transitions. [2022-01-31 18:24:20,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 18:24:20,184 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.037974683544304) internal successors, (240), 78 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 614 [2022-01-31 18:24:20,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:20,185 INFO L225 Difference]: With dead ends: 944 [2022-01-31 18:24:20,185 INFO L226 Difference]: Without dead ends: 708 [2022-01-31 18:24:20,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 18:24:20,187 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3794 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 530 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3795 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 530 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:20,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3795 Valid, 35 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [530 Valid, 954 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:24:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-01-31 18:24:20,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 702. [2022-01-31 18:24:20,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 696 states have (on average 1.331896551724138) internal successors, (927), 696 states have internal predecessors, (927), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:20,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 932 transitions. [2022-01-31 18:24:20,407 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 932 transitions. Word has length 614 [2022-01-31 18:24:20,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:20,407 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 932 transitions. [2022-01-31 18:24:20,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.037974683544304) internal successors, (240), 78 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:20,407 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 932 transitions. [2022-01-31 18:24:20,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2022-01-31 18:24:20,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:20,410 INFO L514 BasicCegarLoop]: trace histogram [77, 76, 76, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:20,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 18:24:20,410 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:20,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:20,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1487636118, now seen corresponding path program 76 times [2022-01-31 18:24:20,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:20,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448449285] [2022-01-31 18:24:20,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:20,412 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:20,412 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:20,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:20,431 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:22,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:22,418 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 18:24:22,418 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:22,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448449285] [2022-01-31 18:24:22,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [448449285] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:22,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:22,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 18:24:22,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916837986] [2022-01-31 18:24:22,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:22,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 18:24:22,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:22,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 18:24:22,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 18:24:22,421 INFO L87 Difference]: Start difference. First operand 702 states and 932 transitions. Second operand has 80 states, 80 states have (on average 3.0375) internal successors, (243), 79 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:26,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:26,539 INFO L93 Difference]: Finished difference Result 956 states and 1195 transitions. [2022-01-31 18:24:26,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 18:24:26,539 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.0375) internal successors, (243), 79 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 622 [2022-01-31 18:24:26,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:26,540 INFO L225 Difference]: With dead ends: 956 [2022-01-31 18:24:26,540 INFO L226 Difference]: Without dead ends: 717 [2022-01-31 18:24:26,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 18:24:26,542 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3533 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3534 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:26,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3534 Valid, 35 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:24:26,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-01-31 18:24:26,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 711. [2022-01-31 18:24:26,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 705 states have (on average 1.3319148936170213) internal successors, (939), 705 states have internal predecessors, (939), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:26,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 944 transitions. [2022-01-31 18:24:26,778 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 944 transitions. Word has length 622 [2022-01-31 18:24:26,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:26,779 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 944 transitions. [2022-01-31 18:24:26,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.0375) internal successors, (243), 79 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:26,779 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 944 transitions. [2022-01-31 18:24:26,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2022-01-31 18:24:26,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:26,781 INFO L514 BasicCegarLoop]: trace histogram [78, 77, 77, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:26,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 18:24:26,782 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:26,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:26,782 INFO L85 PathProgramCache]: Analyzing trace with hash -597172718, now seen corresponding path program 77 times [2022-01-31 18:24:26,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:26,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870557757] [2022-01-31 18:24:26,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:26,784 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:26,784 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:26,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:26,796 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:28,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:28,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:28,847 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:28,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870557757] [2022-01-31 18:24:28,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [870557757] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:28,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:28,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 18:24:28,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753602922] [2022-01-31 18:24:28,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:28,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 18:24:28,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:28,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 18:24:28,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 18:24:28,849 INFO L87 Difference]: Start difference. First operand 711 states and 944 transitions. Second operand has 81 states, 81 states have (on average 3.037037037037037) internal successors, (246), 80 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:33,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:33,027 INFO L93 Difference]: Finished difference Result 968 states and 1210 transitions. [2022-01-31 18:24:33,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 18:24:33,027 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.037037037037037) internal successors, (246), 80 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 630 [2022-01-31 18:24:33,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:33,029 INFO L225 Difference]: With dead ends: 968 [2022-01-31 18:24:33,029 INFO L226 Difference]: Without dead ends: 726 [2022-01-31 18:24:33,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 18:24:33,031 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3064 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3065 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:33,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3065 Valid, 40 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:24:33,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-01-31 18:24:33,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 720. [2022-01-31 18:24:33,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 714 states have (on average 1.3319327731092436) internal successors, (951), 714 states have internal predecessors, (951), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:33,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 956 transitions. [2022-01-31 18:24:33,268 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 956 transitions. Word has length 630 [2022-01-31 18:24:33,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:33,268 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 956 transitions. [2022-01-31 18:24:33,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.037037037037037) internal successors, (246), 80 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:33,269 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 956 transitions. [2022-01-31 18:24:33,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2022-01-31 18:24:33,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:33,271 INFO L514 BasicCegarLoop]: trace histogram [79, 78, 78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:33,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 18:24:33,271 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:33,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:33,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2012180118, now seen corresponding path program 78 times [2022-01-31 18:24:33,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:33,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254183793] [2022-01-31 18:24:33,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:33,274 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:33,274 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:33,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:33,288 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:35,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:35,319 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:35,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254183793] [2022-01-31 18:24:35,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1254183793] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:35,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:35,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 18:24:35,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733418828] [2022-01-31 18:24:35,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:35,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 18:24:35,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:35,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 18:24:35,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 18:24:35,321 INFO L87 Difference]: Start difference. First operand 720 states and 956 transitions. Second operand has 82 states, 82 states have (on average 3.0365853658536586) internal successors, (249), 81 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:39,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:39,614 INFO L93 Difference]: Finished difference Result 980 states and 1225 transitions. [2022-01-31 18:24:39,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 18:24:39,614 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.0365853658536586) internal successors, (249), 81 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 638 [2022-01-31 18:24:39,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:39,615 INFO L225 Difference]: With dead ends: 980 [2022-01-31 18:24:39,615 INFO L226 Difference]: Without dead ends: 735 [2022-01-31 18:24:39,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 18:24:39,617 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3459 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3460 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:39,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3460 Valid, 40 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:24:39,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-01-31 18:24:39,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 729. [2022-01-31 18:24:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 723 states have (on average 1.3319502074688796) internal successors, (963), 723 states have internal predecessors, (963), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:39,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 968 transitions. [2022-01-31 18:24:39,842 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 968 transitions. Word has length 638 [2022-01-31 18:24:39,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:39,842 INFO L470 AbstractCegarLoop]: Abstraction has 729 states and 968 transitions. [2022-01-31 18:24:39,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.0365853658536586) internal successors, (249), 81 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:39,842 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 968 transitions. [2022-01-31 18:24:39,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2022-01-31 18:24:39,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:39,854 INFO L514 BasicCegarLoop]: trace histogram [80, 79, 79, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:39,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 18:24:39,855 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:39,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:39,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1618986990, now seen corresponding path program 79 times [2022-01-31 18:24:39,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:39,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618381523] [2022-01-31 18:24:39,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:39,857 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:39,857 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:39,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:39,871 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:41,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:41,948 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:41,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618381523] [2022-01-31 18:24:41,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [618381523] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:41,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:41,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 18:24:41,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159635813] [2022-01-31 18:24:41,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:41,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 18:24:41,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:41,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 18:24:41,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 18:24:41,950 INFO L87 Difference]: Start difference. First operand 729 states and 968 transitions. Second operand has 83 states, 83 states have (on average 3.036144578313253) internal successors, (252), 82 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:46,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:46,345 INFO L93 Difference]: Finished difference Result 992 states and 1240 transitions. [2022-01-31 18:24:46,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 18:24:46,346 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.036144578313253) internal successors, (252), 82 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 646 [2022-01-31 18:24:46,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:46,347 INFO L225 Difference]: With dead ends: 992 [2022-01-31 18:24:46,347 INFO L226 Difference]: Without dead ends: 744 [2022-01-31 18:24:46,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 18:24:46,349 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3358 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3359 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:46,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3359 Valid, 45 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:24:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-01-31 18:24:46,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 738. [2022-01-31 18:24:46,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 732 states have (on average 1.3319672131147542) internal successors, (975), 732 states have internal predecessors, (975), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:46,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 980 transitions. [2022-01-31 18:24:46,607 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 980 transitions. Word has length 646 [2022-01-31 18:24:46,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:46,607 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 980 transitions. [2022-01-31 18:24:46,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.036144578313253) internal successors, (252), 82 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:46,607 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 980 transitions. [2022-01-31 18:24:46,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 655 [2022-01-31 18:24:46,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:46,610 INFO L514 BasicCegarLoop]: trace histogram [81, 80, 80, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:46,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 18:24:46,610 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:46,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:46,610 INFO L85 PathProgramCache]: Analyzing trace with hash -138712726, now seen corresponding path program 80 times [2022-01-31 18:24:46,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:46,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815810444] [2022-01-31 18:24:46,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:46,613 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:46,613 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:46,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:46,629 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:48,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:48,852 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:48,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815810444] [2022-01-31 18:24:48,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1815810444] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:48,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:48,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 18:24:48,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050251321] [2022-01-31 18:24:48,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:48,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 18:24:48,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:48,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 18:24:48,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 18:24:48,854 INFO L87 Difference]: Start difference. First operand 738 states and 980 transitions. Second operand has 84 states, 84 states have (on average 3.0357142857142856) internal successors, (255), 83 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:53,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:53,412 INFO L93 Difference]: Finished difference Result 1004 states and 1255 transitions. [2022-01-31 18:24:53,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 18:24:53,412 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.0357142857142856) internal successors, (255), 83 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 654 [2022-01-31 18:24:53,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:53,414 INFO L225 Difference]: With dead ends: 1004 [2022-01-31 18:24:53,414 INFO L226 Difference]: Without dead ends: 753 [2022-01-31 18:24:53,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 18:24:53,415 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3193 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3194 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:53,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3194 Valid, 50 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:24:53,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-01-31 18:24:53,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 747. [2022-01-31 18:24:53,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 741 states have (on average 1.3319838056680162) internal successors, (987), 741 states have internal predecessors, (987), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:53,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 992 transitions. [2022-01-31 18:24:53,694 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 992 transitions. Word has length 654 [2022-01-31 18:24:53,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:53,694 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 992 transitions. [2022-01-31 18:24:53,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.0357142857142856) internal successors, (255), 83 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:53,695 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 992 transitions. [2022-01-31 18:24:53,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2022-01-31 18:24:53,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:53,697 INFO L514 BasicCegarLoop]: trace histogram [82, 81, 81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:53,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 18:24:53,697 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:53,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:53,697 INFO L85 PathProgramCache]: Analyzing trace with hash 185455122, now seen corresponding path program 81 times [2022-01-31 18:24:53,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:53,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326946058] [2022-01-31 18:24:53,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:53,700 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:53,700 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:53,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:53,714 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:55,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:55,909 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:55,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326946058] [2022-01-31 18:24:55,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [326946058] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:55,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:55,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 18:24:55,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361093398] [2022-01-31 18:24:55,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:55,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 18:24:55,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:55,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 18:24:55,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 18:24:55,912 INFO L87 Difference]: Start difference. First operand 747 states and 992 transitions. Second operand has 85 states, 85 states have (on average 3.0352941176470587) internal successors, (258), 84 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:00,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:00,520 INFO L93 Difference]: Finished difference Result 1016 states and 1270 transitions. [2022-01-31 18:25:00,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 18:25:00,520 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.0352941176470587) internal successors, (258), 84 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 662 [2022-01-31 18:25:00,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:00,522 INFO L225 Difference]: With dead ends: 1016 [2022-01-31 18:25:00,522 INFO L226 Difference]: Without dead ends: 762 [2022-01-31 18:25:00,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 18:25:00,523 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3596 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3597 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:00,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3597 Valid, 40 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [503 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:25:00,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-01-31 18:25:00,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 756. [2022-01-31 18:25:00,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 750 states have (on average 1.332) internal successors, (999), 750 states have internal predecessors, (999), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1004 transitions. [2022-01-31 18:25:00,789 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1004 transitions. Word has length 662 [2022-01-31 18:25:00,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:00,790 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 1004 transitions. [2022-01-31 18:25:00,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.0352941176470587) internal successors, (258), 84 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:00,790 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1004 transitions. [2022-01-31 18:25:00,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 671 [2022-01-31 18:25:00,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:00,792 INFO L514 BasicCegarLoop]: trace histogram [83, 82, 82, 82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:00,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 18:25:00,793 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:00,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:00,793 INFO L85 PathProgramCache]: Analyzing trace with hash -557514390, now seen corresponding path program 82 times [2022-01-31 18:25:00,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:00,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463531659] [2022-01-31 18:25:00,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:00,795 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:00,795 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:00,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:00,810 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:03,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:03,141 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:03,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463531659] [2022-01-31 18:25:03,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1463531659] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:03,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:03,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 18:25:03,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243543401] [2022-01-31 18:25:03,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:03,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 18:25:03,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:03,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 18:25:03,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 18:25:03,144 INFO L87 Difference]: Start difference. First operand 756 states and 1004 transitions. Second operand has 86 states, 86 states have (on average 3.0348837209302326) internal successors, (261), 85 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:08,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:08,000 INFO L93 Difference]: Finished difference Result 1028 states and 1285 transitions. [2022-01-31 18:25:08,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 18:25:08,000 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.0348837209302326) internal successors, (261), 85 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 670 [2022-01-31 18:25:08,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:08,002 INFO L225 Difference]: With dead ends: 1028 [2022-01-31 18:25:08,002 INFO L226 Difference]: Without dead ends: 771 [2022-01-31 18:25:08,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 18:25:08,003 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3767 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3768 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:08,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3768 Valid, 35 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:25:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-01-31 18:25:08,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 765. [2022-01-31 18:25:08,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 759 states have (on average 1.33201581027668) internal successors, (1011), 759 states have internal predecessors, (1011), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:08,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1016 transitions. [2022-01-31 18:25:08,295 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1016 transitions. Word has length 670 [2022-01-31 18:25:08,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:08,295 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 1016 transitions. [2022-01-31 18:25:08,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.0348837209302326) internal successors, (261), 85 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:08,295 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1016 transitions. [2022-01-31 18:25:08,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2022-01-31 18:25:08,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:08,298 INFO L514 BasicCegarLoop]: trace histogram [84, 83, 83, 83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:08,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 18:25:08,298 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:08,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:08,298 INFO L85 PathProgramCache]: Analyzing trace with hash -392123374, now seen corresponding path program 83 times [2022-01-31 18:25:08,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:08,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559987398] [2022-01-31 18:25:08,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:08,300 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:08,300 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:08,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:08,316 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:10,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:10,580 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:10,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559987398] [2022-01-31 18:25:10,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1559987398] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:10,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:10,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 18:25:10,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987599300] [2022-01-31 18:25:10,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:10,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 18:25:10,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:10,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 18:25:10,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 18:25:10,583 INFO L87 Difference]: Start difference. First operand 765 states and 1016 transitions. Second operand has 87 states, 87 states have (on average 3.0344827586206895) internal successors, (264), 86 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:15,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:15,520 INFO L93 Difference]: Finished difference Result 1040 states and 1300 transitions. [2022-01-31 18:25:15,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 18:25:15,520 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.0344827586206895) internal successors, (264), 86 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 678 [2022-01-31 18:25:15,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:15,521 INFO L225 Difference]: With dead ends: 1040 [2022-01-31 18:25:15,521 INFO L226 Difference]: Without dead ends: 780 [2022-01-31 18:25:15,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 18:25:15,523 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3986 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3987 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:15,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3987 Valid, 45 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:25:15,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-01-31 18:25:15,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 774. [2022-01-31 18:25:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 768 states have (on average 1.33203125) internal successors, (1023), 768 states have internal predecessors, (1023), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1028 transitions. [2022-01-31 18:25:15,815 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1028 transitions. Word has length 678 [2022-01-31 18:25:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:15,815 INFO L470 AbstractCegarLoop]: Abstraction has 774 states and 1028 transitions. [2022-01-31 18:25:15,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.0344827586206895) internal successors, (264), 86 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:15,816 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1028 transitions. [2022-01-31 18:25:15,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2022-01-31 18:25:15,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:15,818 INFO L514 BasicCegarLoop]: trace histogram [85, 84, 84, 84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:15,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 18:25:15,818 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:15,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:15,819 INFO L85 PathProgramCache]: Analyzing trace with hash 295524714, now seen corresponding path program 84 times [2022-01-31 18:25:15,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:15,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183767978] [2022-01-31 18:25:15,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:15,821 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:15,821 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:15,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:15,836 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:18,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:18,217 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:18,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183767978] [2022-01-31 18:25:18,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1183767978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:18,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:18,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 18:25:18,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124873250] [2022-01-31 18:25:18,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:18,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 18:25:18,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:18,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 18:25:18,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 18:25:18,220 INFO L87 Difference]: Start difference. First operand 774 states and 1028 transitions. Second operand has 88 states, 88 states have (on average 3.034090909090909) internal successors, (267), 87 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:23,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:23,201 INFO L93 Difference]: Finished difference Result 1052 states and 1315 transitions. [2022-01-31 18:25:23,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 18:25:23,202 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.034090909090909) internal successors, (267), 87 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 686 [2022-01-31 18:25:23,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:23,203 INFO L225 Difference]: With dead ends: 1052 [2022-01-31 18:25:23,203 INFO L226 Difference]: Without dead ends: 789 [2022-01-31 18:25:23,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 18:25:23,205 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3077 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3078 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:23,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3078 Valid, 70 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:25:23,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-01-31 18:25:23,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 783. [2022-01-31 18:25:23,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 777 states have (on average 1.332046332046332) internal successors, (1035), 777 states have internal predecessors, (1035), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:23,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1040 transitions. [2022-01-31 18:25:23,510 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1040 transitions. Word has length 686 [2022-01-31 18:25:23,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:23,511 INFO L470 AbstractCegarLoop]: Abstraction has 783 states and 1040 transitions. [2022-01-31 18:25:23,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.034090909090909) internal successors, (267), 87 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:23,511 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1040 transitions. [2022-01-31 18:25:23,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2022-01-31 18:25:23,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:23,514 INFO L514 BasicCegarLoop]: trace histogram [86, 85, 85, 85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:23,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 18:25:23,515 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:23,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:23,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1782004206, now seen corresponding path program 85 times [2022-01-31 18:25:23,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:23,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454746155] [2022-01-31 18:25:23,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:23,518 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:23,518 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:23,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:23,536 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:25,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:25,947 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:25,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454746155] [2022-01-31 18:25:25,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1454746155] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:25,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:25,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 18:25:25,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851963447] [2022-01-31 18:25:25,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:25,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 18:25:25,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:25,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 18:25:25,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:25:25,950 INFO L87 Difference]: Start difference. First operand 783 states and 1040 transitions. Second operand has 89 states, 89 states have (on average 3.033707865168539) internal successors, (270), 88 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:31,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:31,071 INFO L93 Difference]: Finished difference Result 1064 states and 1330 transitions. [2022-01-31 18:25:31,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 18:25:31,071 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.033707865168539) internal successors, (270), 88 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 694 [2022-01-31 18:25:31,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:31,073 INFO L225 Difference]: With dead ends: 1064 [2022-01-31 18:25:31,073 INFO L226 Difference]: Without dead ends: 798 [2022-01-31 18:25:31,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 18:25:31,075 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3520 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3521 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:31,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3521 Valid, 55 Invalid, 1611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:25:31,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-01-31 18:25:31,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 792. [2022-01-31 18:25:31,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 786 states have (on average 1.33206106870229) internal successors, (1047), 786 states have internal predecessors, (1047), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:31,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1052 transitions. [2022-01-31 18:25:31,392 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1052 transitions. Word has length 694 [2022-01-31 18:25:31,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:31,393 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 1052 transitions. [2022-01-31 18:25:31,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.033707865168539) internal successors, (270), 88 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:31,393 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1052 transitions. [2022-01-31 18:25:31,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 703 [2022-01-31 18:25:31,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:31,396 INFO L514 BasicCegarLoop]: trace histogram [87, 86, 86, 86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:31,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 18:25:31,396 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:31,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:31,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1354002794, now seen corresponding path program 86 times [2022-01-31 18:25:31,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:31,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699243410] [2022-01-31 18:25:31,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:31,399 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:31,399 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:31,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:31,414 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:33,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:33,858 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:33,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699243410] [2022-01-31 18:25:33,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [699243410] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:33,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:33,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 18:25:33,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268005462] [2022-01-31 18:25:33,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:33,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 18:25:33,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:33,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 18:25:33,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 18:25:33,860 INFO L87 Difference]: Start difference. First operand 792 states and 1052 transitions. Second operand has 90 states, 90 states have (on average 3.033333333333333) internal successors, (273), 89 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:38,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:38,973 INFO L93 Difference]: Finished difference Result 1076 states and 1345 transitions. [2022-01-31 18:25:38,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 18:25:38,974 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.033333333333333) internal successors, (273), 89 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 702 [2022-01-31 18:25:38,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:38,975 INFO L225 Difference]: With dead ends: 1076 [2022-01-31 18:25:38,975 INFO L226 Difference]: Without dead ends: 807 [2022-01-31 18:25:38,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 18:25:38,977 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3499 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3500 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:38,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3500 Valid, 60 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:25:38,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-01-31 18:25:39,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 801. [2022-01-31 18:25:39,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 795 states have (on average 1.3320754716981131) internal successors, (1059), 795 states have internal predecessors, (1059), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:39,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1064 transitions. [2022-01-31 18:25:39,265 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1064 transitions. Word has length 702 [2022-01-31 18:25:39,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:39,265 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 1064 transitions. [2022-01-31 18:25:39,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.033333333333333) internal successors, (273), 89 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:39,265 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1064 transitions. [2022-01-31 18:25:39,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 711 [2022-01-31 18:25:39,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:39,268 INFO L514 BasicCegarLoop]: trace histogram [88, 87, 87, 87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:39,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 18:25:39,268 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:39,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:39,268 INFO L85 PathProgramCache]: Analyzing trace with hash 68558866, now seen corresponding path program 87 times [2022-01-31 18:25:39,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:39,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377545531] [2022-01-31 18:25:39,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:39,270 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:39,271 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:39,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:39,285 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:41,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:41,736 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:41,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377545531] [2022-01-31 18:25:41,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1377545531] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:41,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:41,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 18:25:41,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624658840] [2022-01-31 18:25:41,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:41,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 18:25:41,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:41,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 18:25:41,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 18:25:41,739 INFO L87 Difference]: Start difference. First operand 801 states and 1064 transitions. Second operand has 91 states, 91 states have (on average 3.032967032967033) internal successors, (276), 90 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:46,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:46,935 INFO L93 Difference]: Finished difference Result 1088 states and 1360 transitions. [2022-01-31 18:25:46,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 18:25:46,936 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.032967032967033) internal successors, (276), 90 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 710 [2022-01-31 18:25:46,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:46,937 INFO L225 Difference]: With dead ends: 1088 [2022-01-31 18:25:46,937 INFO L226 Difference]: Without dead ends: 816 [2022-01-31 18:25:46,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 18:25:46,939 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3622 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 511 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3623 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 511 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:46,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3623 Valid, 50 Invalid, 1639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [511 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:25:46,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-01-31 18:25:47,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 810. [2022-01-31 18:25:47,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 804 states have (on average 1.3320895522388059) internal successors, (1071), 804 states have internal predecessors, (1071), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:47,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1076 transitions. [2022-01-31 18:25:47,241 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1076 transitions. Word has length 710 [2022-01-31 18:25:47,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:47,241 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 1076 transitions. [2022-01-31 18:25:47,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.032967032967033) internal successors, (276), 90 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:47,242 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1076 transitions. [2022-01-31 18:25:47,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 719 [2022-01-31 18:25:47,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:47,244 INFO L514 BasicCegarLoop]: trace histogram [89, 88, 88, 88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:47,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 18:25:47,245 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:47,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:47,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1215973738, now seen corresponding path program 88 times [2022-01-31 18:25:47,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:47,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905788323] [2022-01-31 18:25:47,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:47,247 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:47,247 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:47,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:47,271 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:49,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:49,740 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:49,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905788323] [2022-01-31 18:25:49,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [905788323] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:49,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:49,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 18:25:49,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976635935] [2022-01-31 18:25:49,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:49,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 18:25:49,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:49,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 18:25:49,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 18:25:49,743 INFO L87 Difference]: Start difference. First operand 810 states and 1076 transitions. Second operand has 92 states, 92 states have (on average 3.032608695652174) internal successors, (279), 91 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:55,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:55,078 INFO L93 Difference]: Finished difference Result 1100 states and 1375 transitions. [2022-01-31 18:25:55,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 18:25:55,078 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.032608695652174) internal successors, (279), 91 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 718 [2022-01-31 18:25:55,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:55,079 INFO L225 Difference]: With dead ends: 1100 [2022-01-31 18:25:55,079 INFO L226 Difference]: Without dead ends: 825 [2022-01-31 18:25:55,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 18:25:55,081 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4257 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4258 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:55,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4258 Valid, 45 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:25:55,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-01-31 18:25:55,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 819. [2022-01-31 18:25:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 813 states have (on average 1.3321033210332103) internal successors, (1083), 813 states have internal predecessors, (1083), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:55,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1088 transitions. [2022-01-31 18:25:55,387 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1088 transitions. Word has length 718 [2022-01-31 18:25:55,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:55,388 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1088 transitions. [2022-01-31 18:25:55,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.032608695652174) internal successors, (279), 91 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:55,388 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1088 transitions. [2022-01-31 18:25:55,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2022-01-31 18:25:55,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:55,391 INFO L514 BasicCegarLoop]: trace histogram [90, 89, 89, 89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:55,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 18:25:55,391 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:55,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:55,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1189561838, now seen corresponding path program 89 times [2022-01-31 18:25:55,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:55,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560610178] [2022-01-31 18:25:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:55,393 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:55,393 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:55,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:55,409 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:57,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:57,951 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:57,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560610178] [2022-01-31 18:25:57,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1560610178] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:57,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:57,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 18:25:57,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774309240] [2022-01-31 18:25:57,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:57,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 18:25:57,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:57,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 18:25:57,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 18:25:57,953 INFO L87 Difference]: Start difference. First operand 819 states and 1088 transitions. Second operand has 93 states, 93 states have (on average 3.032258064516129) internal successors, (282), 92 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:03,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:03,357 INFO L93 Difference]: Finished difference Result 1112 states and 1390 transitions. [2022-01-31 18:26:03,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 18:26:03,357 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.032258064516129) internal successors, (282), 92 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 726 [2022-01-31 18:26:03,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:03,359 INFO L225 Difference]: With dead ends: 1112 [2022-01-31 18:26:03,359 INFO L226 Difference]: Without dead ends: 834 [2022-01-31 18:26:03,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 18:26:03,360 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3604 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3605 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:03,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3605 Valid, 65 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:26:03,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-01-31 18:26:03,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 828. [2022-01-31 18:26:03,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 822 states have (on average 1.332116788321168) internal successors, (1095), 822 states have internal predecessors, (1095), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:03,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1100 transitions. [2022-01-31 18:26:03,669 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1100 transitions. Word has length 726 [2022-01-31 18:26:03,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:03,669 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 1100 transitions. [2022-01-31 18:26:03,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.032258064516129) internal successors, (282), 92 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:03,670 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1100 transitions. [2022-01-31 18:26:03,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 735 [2022-01-31 18:26:03,672 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:03,673 INFO L514 BasicCegarLoop]: trace histogram [91, 90, 90, 90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:03,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 18:26:03,673 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:03,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:03,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1856052886, now seen corresponding path program 90 times [2022-01-31 18:26:03,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:03,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738591363] [2022-01-31 18:26:03,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:03,676 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:03,676 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:03,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:03,695 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:06,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:06,297 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 18:26:06,298 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:06,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738591363] [2022-01-31 18:26:06,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [738591363] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:06,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:06,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 18:26:06,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754939664] [2022-01-31 18:26:06,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:06,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 18:26:06,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:06,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 18:26:06,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 18:26:06,301 INFO L87 Difference]: Start difference. First operand 828 states and 1100 transitions. Second operand has 94 states, 94 states have (on average 3.0319148936170213) internal successors, (285), 93 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:11,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:11,786 INFO L93 Difference]: Finished difference Result 1124 states and 1405 transitions. [2022-01-31 18:26:11,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 18:26:11,786 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.0319148936170213) internal successors, (285), 93 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 734 [2022-01-31 18:26:11,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:11,788 INFO L225 Difference]: With dead ends: 1124 [2022-01-31 18:26:11,788 INFO L226 Difference]: Without dead ends: 843 [2022-01-31 18:26:11,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 18:26:11,790 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3703 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3704 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:11,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3704 Valid, 55 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:26:11,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-01-31 18:26:12,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 837. [2022-01-31 18:26:12,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 831 states have (on average 1.332129963898917) internal successors, (1107), 831 states have internal predecessors, (1107), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:12,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1112 transitions. [2022-01-31 18:26:12,106 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1112 transitions. Word has length 734 [2022-01-31 18:26:12,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:12,107 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1112 transitions. [2022-01-31 18:26:12,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.0319148936170213) internal successors, (285), 93 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:12,107 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1112 transitions. [2022-01-31 18:26:12,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 743 [2022-01-31 18:26:12,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:12,110 INFO L514 BasicCegarLoop]: trace histogram [92, 91, 91, 91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:12,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 18:26:12,110 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:12,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:12,111 INFO L85 PathProgramCache]: Analyzing trace with hash -832531438, now seen corresponding path program 91 times [2022-01-31 18:26:12,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:12,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464254496] [2022-01-31 18:26:12,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:12,113 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:12,113 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:12,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:12,129 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:14,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:26:14,786 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:14,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464254496] [2022-01-31 18:26:14,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1464254496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:14,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:14,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 18:26:14,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067923209] [2022-01-31 18:26:14,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:14,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 18:26:14,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:14,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 18:26:14,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 18:26:14,789 INFO L87 Difference]: Start difference. First operand 837 states and 1112 transitions. Second operand has 95 states, 95 states have (on average 3.031578947368421) internal successors, (288), 94 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:20,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:20,511 INFO L93 Difference]: Finished difference Result 1136 states and 1420 transitions. [2022-01-31 18:26:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 18:26:20,511 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.031578947368421) internal successors, (288), 94 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 742 [2022-01-31 18:26:20,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:20,512 INFO L225 Difference]: With dead ends: 1136 [2022-01-31 18:26:20,512 INFO L226 Difference]: Without dead ends: 852 [2022-01-31 18:26:20,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 18:26:20,514 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3770 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3771 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:20,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3771 Valid, 50 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:26:20,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-01-31 18:26:20,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 846. [2022-01-31 18:26:20,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 840 states have (on average 1.332142857142857) internal successors, (1119), 840 states have internal predecessors, (1119), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:20,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1124 transitions. [2022-01-31 18:26:20,836 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1124 transitions. Word has length 742 [2022-01-31 18:26:20,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:20,836 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 1124 transitions. [2022-01-31 18:26:20,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.031578947368421) internal successors, (288), 94 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:20,836 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1124 transitions. [2022-01-31 18:26:20,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2022-01-31 18:26:20,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:20,839 INFO L514 BasicCegarLoop]: trace histogram [93, 92, 92, 92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:20,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 18:26:20,839 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:20,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:20,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1345177238, now seen corresponding path program 92 times [2022-01-31 18:26:20,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:20,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084079155] [2022-01-31 18:26:20,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:20,842 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:20,842 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:20,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:20,859 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:23,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:26:23,621 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:23,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084079155] [2022-01-31 18:26:23,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1084079155] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:23,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:23,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 18:26:23,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424466235] [2022-01-31 18:26:23,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:23,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 18:26:23,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:23,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 18:26:23,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 18:26:23,623 INFO L87 Difference]: Start difference. First operand 846 states and 1124 transitions. Second operand has 96 states, 96 states have (on average 3.03125) internal successors, (291), 95 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:29,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:29,459 INFO L93 Difference]: Finished difference Result 1148 states and 1435 transitions. [2022-01-31 18:26:29,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 18:26:29,459 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.03125) internal successors, (291), 95 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 750 [2022-01-31 18:26:29,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:29,460 INFO L225 Difference]: With dead ends: 1148 [2022-01-31 18:26:29,460 INFO L226 Difference]: Without dead ends: 861 [2022-01-31 18:26:29,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 18:26:29,462 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4405 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 615 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4406 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 615 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:29,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4406 Valid, 50 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [615 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:26:29,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-31 18:26:29,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 855. [2022-01-31 18:26:29,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 849 states have (on average 1.332155477031802) internal successors, (1131), 849 states have internal predecessors, (1131), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:29,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1136 transitions. [2022-01-31 18:26:29,796 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1136 transitions. Word has length 750 [2022-01-31 18:26:29,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:29,796 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 1136 transitions. [2022-01-31 18:26:29,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.03125) internal successors, (291), 95 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:29,797 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1136 transitions. [2022-01-31 18:26:29,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2022-01-31 18:26:29,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:29,800 INFO L514 BasicCegarLoop]: trace histogram [94, 93, 93, 93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:29,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 18:26:29,800 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:29,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:29,800 INFO L85 PathProgramCache]: Analyzing trace with hash -243421678, now seen corresponding path program 93 times [2022-01-31 18:26:29,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:29,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58713276] [2022-01-31 18:26:29,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:29,802 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:29,802 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:29,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:29,819 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:32,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:26:32,658 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:32,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58713276] [2022-01-31 18:26:32,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [58713276] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:32,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:32,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 18:26:32,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46328366] [2022-01-31 18:26:32,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:32,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 18:26:32,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:32,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 18:26:32,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 18:26:32,661 INFO L87 Difference]: Start difference. First operand 855 states and 1136 transitions. Second operand has 97 states, 97 states have (on average 3.0309278350515463) internal successors, (294), 96 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:38,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:38,609 INFO L93 Difference]: Finished difference Result 1160 states and 1450 transitions. [2022-01-31 18:26:38,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 18:26:38,609 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.0309278350515463) internal successors, (294), 96 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 758 [2022-01-31 18:26:38,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:38,610 INFO L225 Difference]: With dead ends: 1160 [2022-01-31 18:26:38,610 INFO L226 Difference]: Without dead ends: 870 [2022-01-31 18:26:38,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 18:26:38,612 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4536 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4537 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:38,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4537 Valid, 40 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:26:38,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-01-31 18:26:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 864. [2022-01-31 18:26:38,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 858 states have (on average 1.332167832167832) internal successors, (1143), 858 states have internal predecessors, (1143), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1148 transitions. [2022-01-31 18:26:38,957 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1148 transitions. Word has length 758 [2022-01-31 18:26:38,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:38,957 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 1148 transitions. [2022-01-31 18:26:38,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.0309278350515463) internal successors, (294), 96 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:38,957 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1148 transitions. [2022-01-31 18:26:38,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 767 [2022-01-31 18:26:38,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:38,960 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:38,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 18:26:38,961 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:38,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:38,961 INFO L85 PathProgramCache]: Analyzing trace with hash 340021610, now seen corresponding path program 94 times [2022-01-31 18:26:38,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:38,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135918425] [2022-01-31 18:26:38,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:38,963 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:38,963 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:38,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:38,980 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:39,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:41,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:26:41,793 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:41,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135918425] [2022-01-31 18:26:41,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [135918425] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:41,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:41,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 18:26:41,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085438719] [2022-01-31 18:26:41,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:41,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 18:26:41,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:41,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 18:26:41,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 18:26:41,796 INFO L87 Difference]: Start difference. First operand 864 states and 1148 transitions. Second operand has 98 states, 98 states have (on average 3.0306122448979593) internal successors, (297), 97 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:47,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:47,868 INFO L93 Difference]: Finished difference Result 1172 states and 1465 transitions. [2022-01-31 18:26:47,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 18:26:47,869 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.0306122448979593) internal successors, (297), 97 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 766 [2022-01-31 18:26:47,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:47,870 INFO L225 Difference]: With dead ends: 1172 [2022-01-31 18:26:47,870 INFO L226 Difference]: Without dead ends: 879 [2022-01-31 18:26:47,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 18:26:47,872 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4411 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 615 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4412 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 615 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:47,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4412 Valid, 50 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [615 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:26:47,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-01-31 18:26:48,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 873. [2022-01-31 18:26:48,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 867 states have (on average 1.3321799307958477) internal successors, (1155), 867 states have internal predecessors, (1155), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1160 transitions. [2022-01-31 18:26:48,222 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1160 transitions. Word has length 766 [2022-01-31 18:26:48,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:48,222 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1160 transitions. [2022-01-31 18:26:48,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.0306122448979593) internal successors, (297), 97 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:48,223 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1160 transitions. [2022-01-31 18:26:48,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2022-01-31 18:26:48,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:48,226 INFO L514 BasicCegarLoop]: trace histogram [96, 95, 95, 95, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:48,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 18:26:48,226 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:48,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:48,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1677723666, now seen corresponding path program 95 times [2022-01-31 18:26:48,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:48,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786864199] [2022-01-31 18:26:48,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:48,228 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:48,228 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:48,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:48,246 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:51,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:26:51,148 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:51,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786864199] [2022-01-31 18:26:51,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [786864199] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:51,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:51,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 18:26:51,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411952866] [2022-01-31 18:26:51,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:51,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 18:26:51,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:51,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 18:26:51,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 18:26:51,151 INFO L87 Difference]: Start difference. First operand 873 states and 1160 transitions. Second operand has 99 states, 99 states have (on average 3.0303030303030303) internal successors, (300), 98 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:57,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:57,520 INFO L93 Difference]: Finished difference Result 1184 states and 1480 transitions. [2022-01-31 18:26:57,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 18:26:57,521 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.0303030303030303) internal successors, (300), 98 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 774 [2022-01-31 18:26:57,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:57,522 INFO L225 Difference]: With dead ends: 1184 [2022-01-31 18:26:57,522 INFO L226 Difference]: Without dead ends: 888 [2022-01-31 18:26:57,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 18:26:57,524 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4222 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4223 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:57,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4223 Valid, 55 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:26:57,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2022-01-31 18:26:57,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 882. [2022-01-31 18:26:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 876 states have (on average 1.332191780821918) internal successors, (1167), 876 states have internal predecessors, (1167), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:57,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1172 transitions. [2022-01-31 18:26:57,890 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1172 transitions. Word has length 774 [2022-01-31 18:26:57,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:57,891 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 1172 transitions. [2022-01-31 18:26:57,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.0303030303030303) internal successors, (300), 98 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:57,891 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1172 transitions. [2022-01-31 18:26:57,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2022-01-31 18:26:57,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:57,894 INFO L514 BasicCegarLoop]: trace histogram [97, 96, 96, 96, 96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:57,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 18:26:57,894 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:57,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:57,895 INFO L85 PathProgramCache]: Analyzing trace with hash 455420266, now seen corresponding path program 96 times [2022-01-31 18:26:57,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:57,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312963934] [2022-01-31 18:26:57,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:57,899 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:57,899 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:57,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:57,921 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:00,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:00,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:27:00,851 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:00,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312963934] [2022-01-31 18:27:00,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [312963934] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:00,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:00,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 18:27:00,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485718527] [2022-01-31 18:27:00,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:00,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 18:27:00,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:00,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 18:27:00,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 18:27:00,854 INFO L87 Difference]: Start difference. First operand 882 states and 1172 transitions. Second operand has 100 states, 100 states have (on average 3.03) internal successors, (303), 99 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:07,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:07,249 INFO L93 Difference]: Finished difference Result 1196 states and 1495 transitions. [2022-01-31 18:27:07,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 18:27:07,250 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.03) internal successors, (303), 99 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 782 [2022-01-31 18:27:07,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:07,251 INFO L225 Difference]: With dead ends: 1196 [2022-01-31 18:27:07,251 INFO L226 Difference]: Without dead ends: 897 [2022-01-31 18:27:07,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 18:27:07,254 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4033 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4034 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 571 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:07,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4034 Valid, 50 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [571 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:27:07,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-01-31 18:27:07,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 891. [2022-01-31 18:27:07,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 885 states have (on average 1.3322033898305086) internal successors, (1179), 885 states have internal predecessors, (1179), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:27:07,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1184 transitions. [2022-01-31 18:27:07,609 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1184 transitions. Word has length 782 [2022-01-31 18:27:07,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:07,609 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 1184 transitions. [2022-01-31 18:27:07,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.03) internal successors, (303), 99 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:07,610 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1184 transitions. [2022-01-31 18:27:07,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2022-01-31 18:27:07,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:07,613 INFO L514 BasicCegarLoop]: trace histogram [98, 97, 97, 97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:27:07,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 18:27:07,613 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:07,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:07,613 INFO L85 PathProgramCache]: Analyzing trace with hash -76045806, now seen corresponding path program 97 times [2022-01-31 18:27:07,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:07,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006720574] [2022-01-31 18:27:07,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:07,616 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:07,616 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:07,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:07,635 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:10,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:27:10,609 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:10,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006720574] [2022-01-31 18:27:10,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1006720574] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:10,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:10,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 18:27:10,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507114236] [2022-01-31 18:27:10,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:10,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 18:27:10,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:10,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 18:27:10,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 18:27:10,612 INFO L87 Difference]: Start difference. First operand 891 states and 1184 transitions. Second operand has 101 states, 101 states have (on average 3.0297029702970297) internal successors, (306), 100 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:17,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:17,191 INFO L93 Difference]: Finished difference Result 1208 states and 1510 transitions. [2022-01-31 18:27:17,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 18:27:17,191 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.0297029702970297) internal successors, (306), 100 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 790 [2022-01-31 18:27:17,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:17,193 INFO L225 Difference]: With dead ends: 1208 [2022-01-31 18:27:17,193 INFO L226 Difference]: Without dead ends: 906 [2022-01-31 18:27:17,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 18:27:17,196 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3860 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3861 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:17,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3861 Valid, 60 Invalid, 1818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:27:17,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2022-01-31 18:27:17,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 900. [2022-01-31 18:27:17,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 894 states have (on average 1.332214765100671) internal successors, (1191), 894 states have internal predecessors, (1191), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:27:17,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1196 transitions. [2022-01-31 18:27:17,558 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1196 transitions. Word has length 790 [2022-01-31 18:27:17,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:17,558 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 1196 transitions. [2022-01-31 18:27:17,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.0297029702970297) internal successors, (306), 100 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:17,559 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1196 transitions. [2022-01-31 18:27:17,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 799 [2022-01-31 18:27:17,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:17,562 INFO L514 BasicCegarLoop]: trace histogram [99, 98, 98, 98, 98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:27:17,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 18:27:17,562 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:17,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:17,562 INFO L85 PathProgramCache]: Analyzing trace with hash 216318314, now seen corresponding path program 98 times [2022-01-31 18:27:17,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:17,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825173211] [2022-01-31 18:27:17,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:17,565 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:17,565 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:17,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:17,585 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:20,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:20,615 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 18:27:20,615 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:20,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825173211] [2022-01-31 18:27:20,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [825173211] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:20,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:20,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 18:27:20,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362707937] [2022-01-31 18:27:20,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:20,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 18:27:20,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:20,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 18:27:20,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 18:27:20,618 INFO L87 Difference]: Start difference. First operand 900 states and 1196 transitions. Second operand has 102 states, 102 states have (on average 3.0294117647058822) internal successors, (309), 101 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:27,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:27,400 INFO L93 Difference]: Finished difference Result 1220 states and 1525 transitions. [2022-01-31 18:27:27,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 18:27:27,405 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.0294117647058822) internal successors, (309), 101 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 798 [2022-01-31 18:27:27,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:27,406 INFO L225 Difference]: With dead ends: 1220 [2022-01-31 18:27:27,406 INFO L226 Difference]: Without dead ends: 915 [2022-01-31 18:27:27,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 18:27:27,409 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4319 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4320 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:27,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4320 Valid, 40 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:27:27,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-01-31 18:27:27,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 909. [2022-01-31 18:27:27,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 903 states have (on average 1.3322259136212624) internal successors, (1203), 903 states have internal predecessors, (1203), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:27:27,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1208 transitions. [2022-01-31 18:27:27,783 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1208 transitions. Word has length 798 [2022-01-31 18:27:27,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:27,783 INFO L470 AbstractCegarLoop]: Abstraction has 909 states and 1208 transitions. [2022-01-31 18:27:27,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.0294117647058822) internal successors, (309), 101 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:27,783 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1208 transitions. [2022-01-31 18:27:27,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 807 [2022-01-31 18:27:27,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:27,786 INFO L514 BasicCegarLoop]: trace histogram [100, 99, 99, 99, 99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:27:27,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 18:27:27,787 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:27,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:27,787 INFO L85 PathProgramCache]: Analyzing trace with hash 561282066, now seen corresponding path program 99 times [2022-01-31 18:27:27,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:27,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335057970] [2022-01-31 18:27:27,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:27,789 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:27,789 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:27,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:27,810 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:30,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:30,925 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 18:27:30,925 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:30,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335057970] [2022-01-31 18:27:30,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1335057970] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:30,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:30,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 18:27:30,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145742870] [2022-01-31 18:27:30,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:30,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 18:27:30,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:30,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 18:27:30,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 18:27:30,929 INFO L87 Difference]: Start difference. First operand 909 states and 1208 transitions. Second operand has 103 states, 103 states have (on average 3.029126213592233) internal successors, (312), 102 states have internal predecessors, (312), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:38,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:38,125 INFO L93 Difference]: Finished difference Result 1232 states and 1540 transitions. [2022-01-31 18:27:38,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 18:27:38,125 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.029126213592233) internal successors, (312), 102 states have internal predecessors, (312), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 806 [2022-01-31 18:27:38,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:38,127 INFO L225 Difference]: With dead ends: 1232 [2022-01-31 18:27:38,127 INFO L226 Difference]: Without dead ends: 924 [2022-01-31 18:27:38,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 18:27:38,129 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4170 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4171 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:38,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4171 Valid, 55 Invalid, 1869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:27:38,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-01-31 18:27:38,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 918. [2022-01-31 18:27:38,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 912 states have (on average 1.332236842105263) internal successors, (1215), 912 states have internal predecessors, (1215), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:27:38,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1220 transitions. [2022-01-31 18:27:38,521 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1220 transitions. Word has length 806 [2022-01-31 18:27:38,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:38,522 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 1220 transitions. [2022-01-31 18:27:38,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.029126213592233) internal successors, (312), 102 states have internal predecessors, (312), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:38,522 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1220 transitions. [2022-01-31 18:27:38,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2022-01-31 18:27:38,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:38,530 INFO L514 BasicCegarLoop]: trace histogram [101, 100, 100, 100, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:27:38,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 18:27:38,530 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:38,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:38,530 INFO L85 PathProgramCache]: Analyzing trace with hash 502471018, now seen corresponding path program 100 times [2022-01-31 18:27:38,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:38,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118571039] [2022-01-31 18:27:38,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:38,532 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:38,532 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:38,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:38,555 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:41,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:27:41,788 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:41,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118571039] [2022-01-31 18:27:41,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [118571039] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:41,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:41,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 18:27:41,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380211972] [2022-01-31 18:27:41,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:41,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 18:27:41,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:41,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 18:27:41,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 18:27:41,791 INFO L87 Difference]: Start difference. First operand 918 states and 1220 transitions. Second operand has 104 states, 104 states have (on average 3.0288461538461537) internal successors, (315), 103 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:48,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:48,817 INFO L93 Difference]: Finished difference Result 1244 states and 1555 transitions. [2022-01-31 18:27:48,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 18:27:48,818 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.0288461538461537) internal successors, (315), 103 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 814 [2022-01-31 18:27:48,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:48,819 INFO L225 Difference]: With dead ends: 1244 [2022-01-31 18:27:48,819 INFO L226 Difference]: Without dead ends: 933 [2022-01-31 18:27:48,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 18:27:48,821 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4037 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4038 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 571 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:48,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4038 Valid, 50 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [571 Valid, 1284 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:27:48,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2022-01-31 18:27:49,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 927. [2022-01-31 18:27:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 921 states have (on average 1.3322475570032573) internal successors, (1227), 921 states have internal predecessors, (1227), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:27:49,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1232 transitions. [2022-01-31 18:27:49,203 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1232 transitions. Word has length 814 [2022-01-31 18:27:49,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:49,203 INFO L470 AbstractCegarLoop]: Abstraction has 927 states and 1232 transitions. [2022-01-31 18:27:49,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.0288461538461537) internal successors, (315), 103 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:49,203 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1232 transitions. [2022-01-31 18:27:49,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 823 [2022-01-31 18:27:49,206 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:49,207 INFO L514 BasicCegarLoop]: trace histogram [102, 101, 101, 101, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:27:49,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 18:27:49,207 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:49,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:49,207 INFO L85 PathProgramCache]: Analyzing trace with hash -746154478, now seen corresponding path program 101 times [2022-01-31 18:27:49,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:49,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230727547] [2022-01-31 18:27:49,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:49,209 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:49,209 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:49,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:49,230 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:52,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:27:52,454 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:52,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230727547] [2022-01-31 18:27:52,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [230727547] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:52,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:52,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 18:27:52,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782364195] [2022-01-31 18:27:52,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:52,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 18:27:52,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:52,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 18:27:52,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 18:27:52,458 INFO L87 Difference]: Start difference. First operand 927 states and 1232 transitions. Second operand has 105 states, 105 states have (on average 3.0285714285714285) internal successors, (318), 104 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:59,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:59,719 INFO L93 Difference]: Finished difference Result 1256 states and 1570 transitions. [2022-01-31 18:27:59,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 18:27:59,719 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 3.0285714285714285) internal successors, (318), 104 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 822 [2022-01-31 18:27:59,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:59,721 INFO L225 Difference]: With dead ends: 1256 [2022-01-31 18:27:59,721 INFO L226 Difference]: Without dead ends: 942 [2022-01-31 18:27:59,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 18:27:59,723 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4656 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4657 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:59,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4657 Valid, 45 Invalid, 1937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:27:59,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-01-31 18:28:00,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 936. [2022-01-31 18:28:00,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 930 states have (on average 1.332258064516129) internal successors, (1239), 930 states have internal predecessors, (1239), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:28:00,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1244 transitions. [2022-01-31 18:28:00,132 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1244 transitions. Word has length 822 [2022-01-31 18:28:00,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:00,132 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 1244 transitions. [2022-01-31 18:28:00,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 3.0285714285714285) internal successors, (318), 104 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:00,132 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1244 transitions. [2022-01-31 18:28:00,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2022-01-31 18:28:00,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:00,135 INFO L514 BasicCegarLoop]: trace histogram [103, 102, 102, 102, 102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:28:00,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 18:28:00,136 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:00,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:00,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1858089322, now seen corresponding path program 102 times [2022-01-31 18:28:00,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:00,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81444481] [2022-01-31 18:28:00,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:00,138 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:00,138 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:28:00,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:00,160 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:03,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:28:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:28:03,482 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:28:03,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81444481] [2022-01-31 18:28:03,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [81444481] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:28:03,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:28:03,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 18:28:03,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447477310] [2022-01-31 18:28:03,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:28:03,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 18:28:03,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:28:03,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 18:28:03,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 18:28:03,485 INFO L87 Difference]: Start difference. First operand 936 states and 1244 transitions. Second operand has 106 states, 106 states have (on average 3.0283018867924527) internal successors, (321), 105 states have internal predecessors, (321), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:10,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:10,801 INFO L93 Difference]: Finished difference Result 1268 states and 1585 transitions. [2022-01-31 18:28:10,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 18:28:10,802 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 3.0283018867924527) internal successors, (321), 105 states have internal predecessors, (321), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 830 [2022-01-31 18:28:10,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:10,807 INFO L225 Difference]: With dead ends: 1268 [2022-01-31 18:28:10,807 INFO L226 Difference]: Without dead ends: 951 [2022-01-31 18:28:10,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 18:28:10,810 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4451 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4452 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:10,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4452 Valid, 55 Invalid, 1948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:28:10,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-01-31 18:28:11,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 945. [2022-01-31 18:28:11,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 939 states have (on average 1.3322683706070289) internal successors, (1251), 939 states have internal predecessors, (1251), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:28:11,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1256 transitions. [2022-01-31 18:28:11,217 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1256 transitions. Word has length 830 [2022-01-31 18:28:11,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:11,218 INFO L470 AbstractCegarLoop]: Abstraction has 945 states and 1256 transitions. [2022-01-31 18:28:11,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 3.0283018867924527) internal successors, (321), 105 states have internal predecessors, (321), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:11,218 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1256 transitions. [2022-01-31 18:28:11,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 839 [2022-01-31 18:28:11,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:11,221 INFO L514 BasicCegarLoop]: trace histogram [104, 103, 103, 103, 103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:28:11,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 18:28:11,221 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:11,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:11,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1556221934, now seen corresponding path program 103 times [2022-01-31 18:28:11,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:11,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136899425] [2022-01-31 18:28:11,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:11,224 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:11,224 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:28:11,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:11,245 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:14,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:28:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:28:14,578 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:28:14,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136899425] [2022-01-31 18:28:14,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1136899425] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:28:14,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:28:14,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 18:28:14,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746469576] [2022-01-31 18:28:14,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:28:14,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 18:28:14,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:28:14,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 18:28:14,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 18:28:14,580 INFO L87 Difference]: Start difference. First operand 945 states and 1256 transitions. Second operand has 107 states, 107 states have (on average 3.02803738317757) internal successors, (324), 106 states have internal predecessors, (324), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:22,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:22,074 INFO L93 Difference]: Finished difference Result 1280 states and 1600 transitions. [2022-01-31 18:28:22,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 18:28:22,075 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.02803738317757) internal successors, (324), 106 states have internal predecessors, (324), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 838 [2022-01-31 18:28:22,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:22,076 INFO L225 Difference]: With dead ends: 1280 [2022-01-31 18:28:22,076 INFO L226 Difference]: Without dead ends: 960 [2022-01-31 18:28:22,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 18:28:22,079 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4510 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4511 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:22,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4511 Valid, 45 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:28:22,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-01-31 18:28:22,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 954. [2022-01-31 18:28:22,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 948 states have (on average 1.3322784810126582) internal successors, (1263), 948 states have internal predecessors, (1263), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:28:22,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1268 transitions. [2022-01-31 18:28:22,495 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1268 transitions. Word has length 838 [2022-01-31 18:28:22,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:22,495 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 1268 transitions. [2022-01-31 18:28:22,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.02803738317757) internal successors, (324), 106 states have internal predecessors, (324), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:22,495 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1268 transitions. [2022-01-31 18:28:22,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 847 [2022-01-31 18:28:22,498 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:22,498 INFO L514 BasicCegarLoop]: trace histogram [105, 104, 104, 104, 104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:28:22,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 18:28:22,499 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:22,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:22,499 INFO L85 PathProgramCache]: Analyzing trace with hash 196872554, now seen corresponding path program 104 times [2022-01-31 18:28:22,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:22,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622411594] [2022-01-31 18:28:22,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:22,501 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:22,501 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:28:22,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:22,523 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:25,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:28:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:28:25,906 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:28:25,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622411594] [2022-01-31 18:28:25,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [622411594] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:28:25,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:28:25,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 18:28:25,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539572412] [2022-01-31 18:28:25,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:28:25,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 18:28:25,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:28:25,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 18:28:25,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 18:28:25,909 INFO L87 Difference]: Start difference. First operand 954 states and 1268 transitions. Second operand has 108 states, 108 states have (on average 3.0277777777777777) internal successors, (327), 107 states have internal predecessors, (327), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:33,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:33,646 INFO L93 Difference]: Finished difference Result 1292 states and 1615 transitions. [2022-01-31 18:28:33,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 18:28:33,647 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 3.0277777777777777) internal successors, (327), 107 states have internal predecessors, (327), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 846 [2022-01-31 18:28:33,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:33,648 INFO L225 Difference]: With dead ends: 1292 [2022-01-31 18:28:33,648 INFO L226 Difference]: Without dead ends: 969 [2022-01-31 18:28:33,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 18:28:33,650 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4481 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4482 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:33,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4482 Valid, 45 Invalid, 1950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:28:33,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2022-01-31 18:28:34,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 963. [2022-01-31 18:28:34,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 957 states have (on average 1.3322884012539185) internal successors, (1275), 957 states have internal predecessors, (1275), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:28:34,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1280 transitions. [2022-01-31 18:28:34,069 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1280 transitions. Word has length 846 [2022-01-31 18:28:34,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:34,069 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1280 transitions. [2022-01-31 18:28:34,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 3.0277777777777777) internal successors, (327), 107 states have internal predecessors, (327), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:34,070 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1280 transitions. [2022-01-31 18:28:34,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 855 [2022-01-31 18:28:34,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:34,073 INFO L514 BasicCegarLoop]: trace histogram [106, 105, 105, 105, 105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:28:34,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 18:28:34,073 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:34,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:34,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1238726126, now seen corresponding path program 105 times [2022-01-31 18:28:34,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:34,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234179203] [2022-01-31 18:28:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:34,075 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:34,075 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:28:34,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:34,098 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:37,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:28:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:28:37,562 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:28:37,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234179203] [2022-01-31 18:28:37,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [234179203] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:28:37,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:28:37,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 18:28:37,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055386680] [2022-01-31 18:28:37,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:28:37,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 18:28:37,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:28:37,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 18:28:37,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 18:28:37,565 INFO L87 Difference]: Start difference. First operand 963 states and 1280 transitions. Second operand has 109 states, 109 states have (on average 3.0275229357798166) internal successors, (330), 108 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:45,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:45,556 INFO L93 Difference]: Finished difference Result 1304 states and 1630 transitions. [2022-01-31 18:28:45,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 18:28:45,557 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 3.0275229357798166) internal successors, (330), 108 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 854 [2022-01-31 18:28:45,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:45,558 INFO L225 Difference]: With dead ends: 1304 [2022-01-31 18:28:45,558 INFO L226 Difference]: Without dead ends: 978 [2022-01-31 18:28:45,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 18:28:45,560 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4732 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4733 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:45,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4733 Valid, 45 Invalid, 1998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:28:45,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-01-31 18:28:45,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 972. [2022-01-31 18:28:45,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 966 states have (on average 1.3322981366459627) internal successors, (1287), 966 states have internal predecessors, (1287), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:28:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1292 transitions. [2022-01-31 18:28:45,991 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1292 transitions. Word has length 854 [2022-01-31 18:28:45,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:45,991 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1292 transitions. [2022-01-31 18:28:45,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 3.0275229357798166) internal successors, (330), 108 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:45,991 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1292 transitions. [2022-01-31 18:28:45,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 863 [2022-01-31 18:28:45,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:45,995 INFO L514 BasicCegarLoop]: trace histogram [107, 106, 106, 106, 106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:28:45,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 18:28:45,996 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:45,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:45,996 INFO L85 PathProgramCache]: Analyzing trace with hash -313089686, now seen corresponding path program 106 times [2022-01-31 18:28:45,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:45,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401296804] [2022-01-31 18:28:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:45,998 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:45,998 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:28:45,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:46,021 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:49,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:28:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:28:49,522 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:28:49,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401296804] [2022-01-31 18:28:49,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1401296804] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:28:49,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:28:49,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 18:28:49,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051553995] [2022-01-31 18:28:49,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:28:49,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 18:28:49,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:28:49,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 18:28:49,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 18:28:49,525 INFO L87 Difference]: Start difference. First operand 972 states and 1292 transitions. Second operand has 110 states, 110 states have (on average 3.0272727272727273) internal successors, (333), 109 states have internal predecessors, (333), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:57,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:57,594 INFO L93 Difference]: Finished difference Result 1316 states and 1645 transitions. [2022-01-31 18:28:57,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 18:28:57,594 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.0272727272727273) internal successors, (333), 109 states have internal predecessors, (333), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 862 [2022-01-31 18:28:57,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:57,596 INFO L225 Difference]: With dead ends: 1316 [2022-01-31 18:28:57,596 INFO L226 Difference]: Without dead ends: 987 [2022-01-31 18:28:57,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 18:28:57,598 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4895 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4896 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:57,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4896 Valid, 45 Invalid, 2033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 1346 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:28:57,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-01-31 18:28:58,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 981. [2022-01-31 18:28:58,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 975 states have (on average 1.3323076923076924) internal successors, (1299), 975 states have internal predecessors, (1299), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:28:58,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1304 transitions. [2022-01-31 18:28:58,034 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1304 transitions. Word has length 862 [2022-01-31 18:28:58,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:58,034 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 1304 transitions. [2022-01-31 18:28:58,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.0272727272727273) internal successors, (333), 109 states have internal predecessors, (333), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1304 transitions. [2022-01-31 18:28:58,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 871 [2022-01-31 18:28:58,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:58,038 INFO L514 BasicCegarLoop]: trace histogram [108, 107, 107, 107, 107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:28:58,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 18:28:58,039 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:58,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:58,039 INFO L85 PathProgramCache]: Analyzing trace with hash -975412206, now seen corresponding path program 107 times [2022-01-31 18:28:58,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:58,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839021904] [2022-01-31 18:28:58,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:58,041 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:58,041 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:28:58,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:58,075 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:01,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:29:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:29:01,638 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:29:01,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839021904] [2022-01-31 18:29:01,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1839021904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:29:01,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:29:01,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 18:29:01,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284233544] [2022-01-31 18:29:01,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:29:01,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 18:29:01,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:29:01,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 18:29:01,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 18:29:01,642 INFO L87 Difference]: Start difference. First operand 981 states and 1304 transitions. Second operand has 111 states, 111 states have (on average 3.027027027027027) internal successors, (336), 110 states have internal predecessors, (336), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:09,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:29:09,923 INFO L93 Difference]: Finished difference Result 1328 states and 1660 transitions. [2022-01-31 18:29:09,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 18:29:09,924 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 3.027027027027027) internal successors, (336), 110 states have internal predecessors, (336), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 870 [2022-01-31 18:29:09,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:29:09,925 INFO L225 Difference]: With dead ends: 1328 [2022-01-31 18:29:09,925 INFO L226 Difference]: Without dead ends: 996 [2022-01-31 18:29:09,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 18:29:09,927 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4986 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4987 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:29:09,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4987 Valid, 50 Invalid, 2064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:29:09,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2022-01-31 18:29:10,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 990. [2022-01-31 18:29:10,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 984 states have (on average 1.3323170731707317) internal successors, (1311), 984 states have internal predecessors, (1311), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:29:10,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1316 transitions. [2022-01-31 18:29:10,388 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1316 transitions. Word has length 870 [2022-01-31 18:29:10,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:29:10,388 INFO L470 AbstractCegarLoop]: Abstraction has 990 states and 1316 transitions. [2022-01-31 18:29:10,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 3.027027027027027) internal successors, (336), 110 states have internal predecessors, (336), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:10,389 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1316 transitions. [2022-01-31 18:29:10,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2022-01-31 18:29:10,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:29:10,392 INFO L514 BasicCegarLoop]: trace histogram [109, 108, 108, 108, 108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:29:10,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 18:29:10,392 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:29:10,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:29:10,393 INFO L85 PathProgramCache]: Analyzing trace with hash -134219414, now seen corresponding path program 108 times [2022-01-31 18:29:10,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:29:10,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902629322] [2022-01-31 18:29:10,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:29:10,394 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:29:10,395 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:29:10,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:29:10,418 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:29:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:14,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:29:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:29:14,114 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:29:14,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902629322] [2022-01-31 18:29:14,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [902629322] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:29:14,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:29:14,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 18:29:14,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144305222] [2022-01-31 18:29:14,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:29:14,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 18:29:14,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:29:14,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 18:29:14,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 18:29:14,117 INFO L87 Difference]: Start difference. First operand 990 states and 1316 transitions. Second operand has 112 states, 112 states have (on average 3.0267857142857144) internal successors, (339), 111 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:22,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:29:22,503 INFO L93 Difference]: Finished difference Result 1340 states and 1675 transitions. [2022-01-31 18:29:22,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 18:29:22,503 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 3.0267857142857144) internal successors, (339), 111 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 878 [2022-01-31 18:29:22,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:29:22,504 INFO L225 Difference]: With dead ends: 1340 [2022-01-31 18:29:22,505 INFO L226 Difference]: Without dead ends: 1005 [2022-01-31 18:29:22,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 18:29:22,507 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4741 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4742 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:29:22,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4742 Valid, 55 Invalid, 2060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:29:22,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-01-31 18:29:22,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 999. [2022-01-31 18:29:22,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 993 states have (on average 1.3323262839879153) internal successors, (1323), 993 states have internal predecessors, (1323), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:29:22,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1328 transitions. [2022-01-31 18:29:22,962 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1328 transitions. Word has length 878 [2022-01-31 18:29:22,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:29:22,963 INFO L470 AbstractCegarLoop]: Abstraction has 999 states and 1328 transitions. [2022-01-31 18:29:22,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 3.0267857142857144) internal successors, (339), 111 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:22,963 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1328 transitions. [2022-01-31 18:29:22,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 887 [2022-01-31 18:29:22,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:29:22,966 INFO L514 BasicCegarLoop]: trace histogram [110, 109, 109, 109, 109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:29:22,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 18:29:22,967 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:29:22,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:29:22,967 INFO L85 PathProgramCache]: Analyzing trace with hash 535002642, now seen corresponding path program 109 times [2022-01-31 18:29:22,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:29:22,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243808749] [2022-01-31 18:29:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:29:22,971 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:29:22,971 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:29:22,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:29:23,000 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:29:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:26,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:29:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:29:26,659 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:29:26,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243808749] [2022-01-31 18:29:26,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [243808749] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:29:26,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:29:26,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 18:29:26,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741885376] [2022-01-31 18:29:26,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:29:26,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 18:29:26,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:29:26,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 18:29:26,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 18:29:26,663 INFO L87 Difference]: Start difference. First operand 999 states and 1328 transitions. Second operand has 113 states, 113 states have (on average 3.0265486725663715) internal successors, (342), 112 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:35,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:29:35,227 INFO L93 Difference]: Finished difference Result 1352 states and 1690 transitions. [2022-01-31 18:29:35,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 18:29:35,227 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 3.0265486725663715) internal successors, (342), 112 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 886 [2022-01-31 18:29:35,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:29:35,229 INFO L225 Difference]: With dead ends: 1352 [2022-01-31 18:29:35,229 INFO L226 Difference]: Without dead ends: 1014 [2022-01-31 18:29:35,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 18:29:35,231 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4768 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1412 mSolverCounterSat, 667 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4769 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 667 IncrementalHoareTripleChecker+Valid, 1412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:29:35,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4769 Valid, 60 Invalid, 2079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [667 Valid, 1412 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:29:35,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-01-31 18:29:35,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 1008. [2022-01-31 18:29:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1002 states have (on average 1.3323353293413174) internal successors, (1335), 1002 states have internal predecessors, (1335), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:29:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1340 transitions. [2022-01-31 18:29:35,693 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1340 transitions. Word has length 886 [2022-01-31 18:29:35,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:29:35,694 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 1340 transitions. [2022-01-31 18:29:35,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 3.0265486725663715) internal successors, (342), 112 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:35,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1340 transitions. [2022-01-31 18:29:35,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 895 [2022-01-31 18:29:35,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:29:35,697 INFO L514 BasicCegarLoop]: trace histogram [111, 110, 110, 110, 110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:29:35,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 18:29:35,698 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:29:35,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:29:35,698 INFO L85 PathProgramCache]: Analyzing trace with hash -64482966, now seen corresponding path program 110 times [2022-01-31 18:29:35,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:29:35,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786005227] [2022-01-31 18:29:35,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:29:35,700 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:29:35,700 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:29:35,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:29:35,724 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:29:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:39,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:29:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:29:39,532 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:29:39,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786005227] [2022-01-31 18:29:39,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [786005227] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:29:39,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:29:39,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 18:29:39,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974744686] [2022-01-31 18:29:39,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:29:39,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 18:29:39,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:29:39,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 18:29:39,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 18:29:39,534 INFO L87 Difference]: Start difference. First operand 1008 states and 1340 transitions. Second operand has 114 states, 114 states have (on average 3.026315789473684) internal successors, (345), 113 states have internal predecessors, (345), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:48,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:29:48,349 INFO L93 Difference]: Finished difference Result 1364 states and 1705 transitions. [2022-01-31 18:29:48,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 18:29:48,349 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 3.026315789473684) internal successors, (345), 113 states have internal predecessors, (345), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 894 [2022-01-31 18:29:48,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:29:48,350 INFO L225 Difference]: With dead ends: 1364 [2022-01-31 18:29:48,350 INFO L226 Difference]: Without dead ends: 1023 [2022-01-31 18:29:48,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 18:29:48,354 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5003 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 698 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5004 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 698 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:29:48,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5004 Valid, 50 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [698 Valid, 1404 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:29:48,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2022-01-31 18:29:48,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1017. [2022-01-31 18:29:48,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1011 states have (on average 1.3323442136498516) internal successors, (1347), 1011 states have internal predecessors, (1347), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:29:48,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1352 transitions. [2022-01-31 18:29:48,830 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1352 transitions. Word has length 894 [2022-01-31 18:29:48,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:29:48,831 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 1352 transitions. [2022-01-31 18:29:48,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 3.026315789473684) internal successors, (345), 113 states have internal predecessors, (345), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:48,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1352 transitions. [2022-01-31 18:29:48,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 903 [2022-01-31 18:29:48,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:29:48,834 INFO L514 BasicCegarLoop]: trace histogram [112, 111, 111, 111, 111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:29:48,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 18:29:48,834 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:29:48,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:29:48,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1513105390, now seen corresponding path program 111 times [2022-01-31 18:29:48,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:29:48,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792399056] [2022-01-31 18:29:48,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:29:48,836 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:29:48,837 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:29:48,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:29:48,866 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:29:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:52,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:29:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:29:52,707 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:29:52,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792399056] [2022-01-31 18:29:52,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [792399056] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:29:52,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:29:52,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 18:29:52,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464588648] [2022-01-31 18:29:52,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:29:52,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 18:29:52,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:29:52,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 18:29:52,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 18:29:52,710 INFO L87 Difference]: Start difference. First operand 1017 states and 1352 transitions. Second operand has 115 states, 115 states have (on average 3.026086956521739) internal successors, (348), 114 states have internal predecessors, (348), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:01,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:30:01,679 INFO L93 Difference]: Finished difference Result 1376 states and 1720 transitions. [2022-01-31 18:30:01,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 18:30:01,680 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 3.026086956521739) internal successors, (348), 114 states have internal predecessors, (348), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 902 [2022-01-31 18:30:01,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:30:01,681 INFO L225 Difference]: With dead ends: 1376 [2022-01-31 18:30:01,681 INFO L226 Difference]: Without dead ends: 1032 [2022-01-31 18:30:01,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 18:30:01,685 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4366 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4367 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:30:01,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4367 Valid, 55 Invalid, 2046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:30:01,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-01-31 18:30:02,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 1026. [2022-01-31 18:30:02,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1020 states have (on average 1.3323529411764705) internal successors, (1359), 1020 states have internal predecessors, (1359), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:30:02,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1364 transitions. [2022-01-31 18:30:02,163 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1364 transitions. Word has length 902 [2022-01-31 18:30:02,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:30:02,163 INFO L470 AbstractCegarLoop]: Abstraction has 1026 states and 1364 transitions. [2022-01-31 18:30:02,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 3.026086956521739) internal successors, (348), 114 states have internal predecessors, (348), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:02,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1364 transitions. [2022-01-31 18:30:02,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 911 [2022-01-31 18:30:02,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:30:02,184 INFO L514 BasicCegarLoop]: trace histogram [113, 112, 112, 112, 112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:30:02,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 18:30:02,184 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:30:02,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:30:02,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1237390998, now seen corresponding path program 112 times [2022-01-31 18:30:02,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:30:02,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870340064] [2022-01-31 18:30:02,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:30:02,187 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:30:02,187 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:30:02,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:30:02,214 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:30:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:06,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:30:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:30:06,131 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:30:06,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870340064] [2022-01-31 18:30:06,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [870340064] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:30:06,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:30:06,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 18:30:06,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590698112] [2022-01-31 18:30:06,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:30:06,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 18:30:06,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:30:06,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 18:30:06,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 18:30:06,135 INFO L87 Difference]: Start difference. First operand 1026 states and 1364 transitions. Second operand has 116 states, 116 states have (on average 3.0258620689655173) internal successors, (351), 115 states have internal predecessors, (351), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:15,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:30:15,326 INFO L93 Difference]: Finished difference Result 1388 states and 1735 transitions. [2022-01-31 18:30:15,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 18:30:15,326 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.0258620689655173) internal successors, (351), 115 states have internal predecessors, (351), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 910 [2022-01-31 18:30:15,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:30:15,327 INFO L225 Difference]: With dead ends: 1388 [2022-01-31 18:30:15,327 INFO L226 Difference]: Without dead ends: 1041 [2022-01-31 18:30:15,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 18:30:15,330 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4889 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 685 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4890 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 685 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:30:15,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4890 Valid, 60 Invalid, 2133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [685 Valid, 1448 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:30:15,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-01-31 18:30:15,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1035. [2022-01-31 18:30:15,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1029 states have (on average 1.3323615160349853) internal successors, (1371), 1029 states have internal predecessors, (1371), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:30:15,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1376 transitions. [2022-01-31 18:30:15,809 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1376 transitions. Word has length 910 [2022-01-31 18:30:15,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:30:15,809 INFO L470 AbstractCegarLoop]: Abstraction has 1035 states and 1376 transitions. [2022-01-31 18:30:15,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.0258620689655173) internal successors, (351), 115 states have internal predecessors, (351), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:15,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1376 transitions. [2022-01-31 18:30:15,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 919 [2022-01-31 18:30:15,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:30:15,813 INFO L514 BasicCegarLoop]: trace histogram [114, 113, 113, 113, 113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:30:15,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 18:30:15,813 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:30:15,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:30:15,814 INFO L85 PathProgramCache]: Analyzing trace with hash -852397550, now seen corresponding path program 113 times [2022-01-31 18:30:15,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:30:15,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769013878] [2022-01-31 18:30:15,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:30:15,815 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:30:15,815 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:30:15,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:30:15,845 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:30:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:19,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:30:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:30:19,758 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:30:19,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769013878] [2022-01-31 18:30:19,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [769013878] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:30:19,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:30:19,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 18:30:19,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970152663] [2022-01-31 18:30:19,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:30:19,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 18:30:19,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:30:19,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 18:30:19,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 18:30:19,761 INFO L87 Difference]: Start difference. First operand 1035 states and 1376 transitions. Second operand has 117 states, 117 states have (on average 3.0256410256410255) internal successors, (354), 116 states have internal predecessors, (354), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:29,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:30:29,008 INFO L93 Difference]: Finished difference Result 1400 states and 1750 transitions. [2022-01-31 18:30:29,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 18:30:29,008 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 3.0256410256410255) internal successors, (354), 116 states have internal predecessors, (354), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 918 [2022-01-31 18:30:29,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:30:29,009 INFO L225 Difference]: With dead ends: 1400 [2022-01-31 18:30:29,010 INFO L226 Difference]: Without dead ends: 1050 [2022-01-31 18:30:29,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 18:30:29,012 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4444 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4445 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:30:29,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4445 Valid, 55 Invalid, 2079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 1450 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:30:29,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2022-01-31 18:30:29,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1044. [2022-01-31 18:30:29,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1038 states have (on average 1.3323699421965318) internal successors, (1383), 1038 states have internal predecessors, (1383), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:30:29,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1388 transitions. [2022-01-31 18:30:29,535 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1388 transitions. Word has length 918 [2022-01-31 18:30:29,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:30:29,535 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 1388 transitions. [2022-01-31 18:30:29,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 3.0256410256410255) internal successors, (354), 116 states have internal predecessors, (354), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:29,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1388 transitions. [2022-01-31 18:30:29,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 927 [2022-01-31 18:30:29,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:30:29,539 INFO L514 BasicCegarLoop]: trace histogram [115, 114, 114, 114, 114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:30:29,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 18:30:29,539 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:30:29,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:30:29,540 INFO L85 PathProgramCache]: Analyzing trace with hash -827031190, now seen corresponding path program 114 times [2022-01-31 18:30:29,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:30:29,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006719522] [2022-01-31 18:30:29,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:30:29,541 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:30:29,542 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:30:29,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:30:29,572 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:30:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:33,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:30:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:30:33,613 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:30:33,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006719522] [2022-01-31 18:30:33,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2006719522] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:30:33,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:30:33,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 18:30:33,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140478122] [2022-01-31 18:30:33,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:30:33,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 18:30:33,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:30:33,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 18:30:33,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 18:30:33,615 INFO L87 Difference]: Start difference. First operand 1044 states and 1388 transitions. Second operand has 118 states, 118 states have (on average 3.0254237288135593) internal successors, (357), 117 states have internal predecessors, (357), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:43,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:30:43,624 INFO L93 Difference]: Finished difference Result 1412 states and 1765 transitions. [2022-01-31 18:30:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 18:30:43,624 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 3.0254237288135593) internal successors, (357), 117 states have internal predecessors, (357), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 926 [2022-01-31 18:30:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:30:43,626 INFO L225 Difference]: With dead ends: 1412 [2022-01-31 18:30:43,626 INFO L226 Difference]: Without dead ends: 1059 [2022-01-31 18:30:43,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 18:30:43,628 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5975 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 824 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5976 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 824 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:30:43,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5976 Valid, 35 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [824 Valid, 1422 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:30:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2022-01-31 18:30:44,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1053. [2022-01-31 18:30:44,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1047 states have (on average 1.332378223495702) internal successors, (1395), 1047 states have internal predecessors, (1395), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:30:44,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1400 transitions. [2022-01-31 18:30:44,176 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1400 transitions. Word has length 926 [2022-01-31 18:30:44,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:30:44,177 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 1400 transitions. [2022-01-31 18:30:44,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 3.0254237288135593) internal successors, (357), 117 states have internal predecessors, (357), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:44,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1400 transitions. [2022-01-31 18:30:44,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 935 [2022-01-31 18:30:44,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:30:44,182 INFO L514 BasicCegarLoop]: trace histogram [116, 115, 115, 115, 115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:30:44,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 18:30:44,182 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:30:44,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:30:44,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1617409006, now seen corresponding path program 115 times [2022-01-31 18:30:44,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:30:44,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209000123] [2022-01-31 18:30:44,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:30:44,184 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:30:44,184 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:30:44,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:30:44,218 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:30:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:48,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:30:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:30:48,419 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:30:48,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209000123] [2022-01-31 18:30:48,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [209000123] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:30:48,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:30:48,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 18:30:48,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497634220] [2022-01-31 18:30:48,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:30:48,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 18:30:48,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:30:48,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 18:30:48,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 18:30:48,423 INFO L87 Difference]: Start difference. First operand 1053 states and 1400 transitions. Second operand has 119 states, 119 states have (on average 3.0252100840336134) internal successors, (360), 118 states have internal predecessors, (360), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:58,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:30:58,691 INFO L93 Difference]: Finished difference Result 1424 states and 1780 transitions. [2022-01-31 18:30:58,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 18:30:58,692 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 3.0252100840336134) internal successors, (360), 118 states have internal predecessors, (360), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 934 [2022-01-31 18:30:58,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:30:58,693 INFO L225 Difference]: With dead ends: 1424 [2022-01-31 18:30:58,693 INFO L226 Difference]: Without dead ends: 1068 [2022-01-31 18:30:58,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 18:30:58,696 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4538 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4539 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:30:58,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4539 Valid, 65 Invalid, 2139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 1494 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:30:58,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2022-01-31 18:30:59,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1062. [2022-01-31 18:30:59,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1056 states have (on average 1.3323863636363635) internal successors, (1407), 1056 states have internal predecessors, (1407), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:30:59,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1412 transitions. [2022-01-31 18:30:59,240 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1412 transitions. Word has length 934 [2022-01-31 18:30:59,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:30:59,240 INFO L470 AbstractCegarLoop]: Abstraction has 1062 states and 1412 transitions. [2022-01-31 18:30:59,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 3.0252100840336134) internal successors, (360), 118 states have internal predecessors, (360), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:59,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1412 transitions. [2022-01-31 18:30:59,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 943 [2022-01-31 18:30:59,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:30:59,245 INFO L514 BasicCegarLoop]: trace histogram [117, 116, 116, 116, 116, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:30:59,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 18:30:59,246 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:30:59,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:30:59,246 INFO L85 PathProgramCache]: Analyzing trace with hash -638002838, now seen corresponding path program 116 times [2022-01-31 18:30:59,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:30:59,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087566885] [2022-01-31 18:30:59,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:30:59,248 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:30:59,248 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:30:59,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:30:59,279 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:30:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:03,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:31:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:31:03,534 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:31:03,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087566885] [2022-01-31 18:31:03,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2087566885] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:31:03,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:31:03,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 18:31:03,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242906389] [2022-01-31 18:31:03,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:31:03,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 18:31:03,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:31:03,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 18:31:03,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 18:31:03,537 INFO L87 Difference]: Start difference. First operand 1062 states and 1412 transitions. Second operand has 120 states, 120 states have (on average 3.025) internal successors, (363), 119 states have internal predecessors, (363), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:31:14,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:31:14,113 INFO L93 Difference]: Finished difference Result 1436 states and 1795 transitions. [2022-01-31 18:31:14,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 18:31:14,114 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 3.025) internal successors, (363), 119 states have internal predecessors, (363), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 942 [2022-01-31 18:31:14,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:31:14,115 INFO L225 Difference]: With dead ends: 1436 [2022-01-31 18:31:14,115 INFO L226 Difference]: Without dead ends: 1077 [2022-01-31 18:31:14,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 18:31:14,118 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5685 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 788 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5686 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 788 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:31:14,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5686 Valid, 40 Invalid, 2244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [788 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:31:14,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-01-31 18:31:14,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1071. [2022-01-31 18:31:14,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1065 states have (on average 1.332394366197183) internal successors, (1419), 1065 states have internal predecessors, (1419), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:31:14,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1424 transitions. [2022-01-31 18:31:14,718 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1424 transitions. Word has length 942 [2022-01-31 18:31:14,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:31:14,718 INFO L470 AbstractCegarLoop]: Abstraction has 1071 states and 1424 transitions. [2022-01-31 18:31:14,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 3.025) internal successors, (363), 119 states have internal predecessors, (363), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:31:14,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1424 transitions. [2022-01-31 18:31:14,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2022-01-31 18:31:14,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:31:14,723 INFO L514 BasicCegarLoop]: trace histogram [118, 117, 117, 117, 117, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:31:14,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 18:31:14,723 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:31:14,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:31:14,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1164679662, now seen corresponding path program 117 times [2022-01-31 18:31:14,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:31:14,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662284123] [2022-01-31 18:31:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:31:14,727 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:31:14,727 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:31:14,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:31:14,767 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:31:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:19,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:31:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:31:19,033 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:31:19,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662284123] [2022-01-31 18:31:19,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [662284123] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:31:19,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:31:19,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 18:31:19,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95513910] [2022-01-31 18:31:19,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:31:19,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 18:31:19,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:31:19,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 18:31:19,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 18:31:19,038 INFO L87 Difference]: Start difference. First operand 1071 states and 1424 transitions. Second operand has 121 states, 121 states have (on average 3.024793388429752) internal successors, (366), 120 states have internal predecessors, (366), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:31:30,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:31:30,009 INFO L93 Difference]: Finished difference Result 1448 states and 1810 transitions. [2022-01-31 18:31:30,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 18:31:30,010 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 3.024793388429752) internal successors, (366), 120 states have internal predecessors, (366), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 950 [2022-01-31 18:31:30,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:31:30,011 INFO L225 Difference]: With dead ends: 1448 [2022-01-31 18:31:30,011 INFO L226 Difference]: Without dead ends: 1086 [2022-01-31 18:31:30,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 18:31:30,014 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5360 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5361 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 751 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:31:30,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5361 Valid, 50 Invalid, 2239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [751 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:31:30,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-01-31 18:31:30,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1080. [2022-01-31 18:31:30,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1074 states have (on average 1.3324022346368716) internal successors, (1431), 1074 states have internal predecessors, (1431), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:31:30,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1436 transitions. [2022-01-31 18:31:30,565 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1436 transitions. Word has length 950 [2022-01-31 18:31:30,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:31:30,565 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 1436 transitions. [2022-01-31 18:31:30,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 3.024793388429752) internal successors, (366), 120 states have internal predecessors, (366), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:31:30,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1436 transitions. [2022-01-31 18:31:30,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 959 [2022-01-31 18:31:30,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:31:30,570 INFO L514 BasicCegarLoop]: trace histogram [119, 118, 118, 118, 118, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:31:30,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 18:31:30,570 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:31:30,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:31:30,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1484517738, now seen corresponding path program 118 times [2022-01-31 18:31:30,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:31:30,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038316845] [2022-01-31 18:31:30,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:31:30,572 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:31:30,572 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:31:30,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:31:30,622 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:31:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:35,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:31:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:31:35,042 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:31:35,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038316845] [2022-01-31 18:31:35,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2038316845] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:31:35,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:31:35,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 18:31:35,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273131330] [2022-01-31 18:31:35,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:31:35,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 18:31:35,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:31:35,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 18:31:35,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 18:31:35,045 INFO L87 Difference]: Start difference. First operand 1080 states and 1436 transitions. Second operand has 122 states, 122 states have (on average 3.0245901639344264) internal successors, (369), 121 states have internal predecessors, (369), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:31:45,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:31:45,987 INFO L93 Difference]: Finished difference Result 1460 states and 1825 transitions. [2022-01-31 18:31:45,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 18:31:45,988 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 3.0245901639344264) internal successors, (369), 121 states have internal predecessors, (369), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 958 [2022-01-31 18:31:45,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:31:45,989 INFO L225 Difference]: With dead ends: 1460 [2022-01-31 18:31:45,989 INFO L226 Difference]: Without dead ends: 1095 [2022-01-31 18:31:45,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 18:31:45,992 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5467 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 762 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5468 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 762 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:31:45,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5468 Valid, 40 Invalid, 2242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [762 Valid, 1480 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:31:45,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2022-01-31 18:31:46,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 1089. [2022-01-31 18:31:46,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1083 states have (on average 1.332409972299169) internal successors, (1443), 1083 states have internal predecessors, (1443), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:31:46,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1448 transitions. [2022-01-31 18:31:46,593 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1448 transitions. Word has length 958 [2022-01-31 18:31:46,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:31:46,593 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1448 transitions. [2022-01-31 18:31:46,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 3.0245901639344264) internal successors, (369), 121 states have internal predecessors, (369), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:31:46,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1448 transitions. [2022-01-31 18:31:46,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 967 [2022-01-31 18:31:46,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:31:46,598 INFO L514 BasicCegarLoop]: trace histogram [120, 119, 119, 119, 119, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:31:46,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 18:31:46,598 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:31:46,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:31:46,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1337311250, now seen corresponding path program 119 times [2022-01-31 18:31:46,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:31:46,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863031197] [2022-01-31 18:31:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:31:46,600 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:31:46,600 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:31:46,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:31:46,636 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:31:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:51,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:31:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:31:51,120 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:31:51,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863031197] [2022-01-31 18:31:51,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1863031197] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:31:51,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:31:51,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 18:31:51,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403155287] [2022-01-31 18:31:51,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:31:51,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 18:31:51,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:31:51,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 18:31:51,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 18:31:51,123 INFO L87 Difference]: Start difference. First operand 1089 states and 1448 transitions. Second operand has 123 states, 123 states have (on average 3.024390243902439) internal successors, (372), 122 states have internal predecessors, (372), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:32:02,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:32:02,607 INFO L93 Difference]: Finished difference Result 1472 states and 1840 transitions. [2022-01-31 18:32:02,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 18:32:02,607 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 3.024390243902439) internal successors, (372), 122 states have internal predecessors, (372), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 966 [2022-01-31 18:32:02,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:32:02,609 INFO L225 Difference]: With dead ends: 1472 [2022-01-31 18:32:02,609 INFO L226 Difference]: Without dead ends: 1104 [2022-01-31 18:32:02,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 18:32:02,612 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5334 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5335 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:32:02,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5335 Valid, 50 Invalid, 2261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 1512 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:32:02,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-01-31 18:32:03,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1098. [2022-01-31 18:32:03,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1092 states have (on average 1.3324175824175823) internal successors, (1455), 1092 states have internal predecessors, (1455), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:32:03,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1460 transitions. [2022-01-31 18:32:03,230 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1460 transitions. Word has length 966 [2022-01-31 18:32:03,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:32:03,231 INFO L470 AbstractCegarLoop]: Abstraction has 1098 states and 1460 transitions. [2022-01-31 18:32:03,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 3.024390243902439) internal successors, (372), 122 states have internal predecessors, (372), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:32:03,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1460 transitions. [2022-01-31 18:32:03,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 975 [2022-01-31 18:32:03,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:32:03,237 INFO L514 BasicCegarLoop]: trace histogram [121, 120, 120, 120, 120, 120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:32:03,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 18:32:03,237 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:32:03,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:32:03,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1230124694, now seen corresponding path program 120 times [2022-01-31 18:32:03,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:32:03,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836908723] [2022-01-31 18:32:03,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:32:03,240 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:32:03,240 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:32:03,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:32:03,274 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:32:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:07,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:32:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:32:07,898 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:32:07,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836908723] [2022-01-31 18:32:07,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [836908723] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:32:07,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:32:07,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 18:32:07,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463353910] [2022-01-31 18:32:07,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:32:07,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 18:32:07,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:32:07,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 18:32:07,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 18:32:07,902 INFO L87 Difference]: Start difference. First operand 1098 states and 1460 transitions. Second operand has 124 states, 124 states have (on average 3.024193548387097) internal successors, (375), 123 states have internal predecessors, (375), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:32:19,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:32:19,681 INFO L93 Difference]: Finished difference Result 1484 states and 1855 transitions. [2022-01-31 18:32:19,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 18:32:19,681 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 3.024193548387097) internal successors, (375), 123 states have internal predecessors, (375), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 974 [2022-01-31 18:32:19,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:32:19,682 INFO L225 Difference]: With dead ends: 1484 [2022-01-31 18:32:19,682 INFO L226 Difference]: Without dead ends: 1113 [2022-01-31 18:32:19,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 18:32:19,709 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5201 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 733 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5202 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 2227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 733 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:32:19,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5202 Valid, 35 Invalid, 2227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [733 Valid, 1494 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:32:19,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-01-31 18:32:20,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1107. [2022-01-31 18:32:20,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1101 states have (on average 1.332425068119891) internal successors, (1467), 1101 states have internal predecessors, (1467), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:32:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1472 transitions. [2022-01-31 18:32:20,312 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1472 transitions. Word has length 974 [2022-01-31 18:32:20,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:32:20,313 INFO L470 AbstractCegarLoop]: Abstraction has 1107 states and 1472 transitions. [2022-01-31 18:32:20,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 3.024193548387097) internal successors, (375), 123 states have internal predecessors, (375), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:32:20,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1472 transitions. [2022-01-31 18:32:20,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 983 [2022-01-31 18:32:20,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:32:20,317 INFO L514 BasicCegarLoop]: trace histogram [122, 121, 121, 121, 121, 121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:32:20,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 18:32:20,317 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:32:20,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:32:20,318 INFO L85 PathProgramCache]: Analyzing trace with hash 613177874, now seen corresponding path program 121 times [2022-01-31 18:32:20,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:32:20,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197341553] [2022-01-31 18:32:20,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:32:20,320 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:32:20,320 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:32:20,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:32:20,355 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:32:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:25,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:32:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:32:25,154 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:32:25,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197341553] [2022-01-31 18:32:25,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1197341553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:32:25,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:32:25,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 18:32:25,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149875414] [2022-01-31 18:32:25,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:32:25,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 18:32:25,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:32:25,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 18:32:25,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 18:32:25,158 INFO L87 Difference]: Start difference. First operand 1107 states and 1472 transitions. Second operand has 125 states, 125 states have (on average 3.024) internal successors, (378), 124 states have internal predecessors, (378), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:32:36,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:32:36,948 INFO L93 Difference]: Finished difference Result 1496 states and 1870 transitions. [2022-01-31 18:32:36,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 18:32:36,948 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 3.024) internal successors, (378), 124 states have internal predecessors, (378), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 982 [2022-01-31 18:32:36,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:32:36,950 INFO L225 Difference]: With dead ends: 1496 [2022-01-31 18:32:36,950 INFO L226 Difference]: Without dead ends: 1122 [2022-01-31 18:32:36,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 18:32:36,952 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5540 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 772 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5541 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 772 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:32:36,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5541 Valid, 55 Invalid, 2318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [772 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:32:36,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-01-31 18:32:37,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1116. [2022-01-31 18:32:37,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1110 states have (on average 1.3324324324324324) internal successors, (1479), 1110 states have internal predecessors, (1479), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:32:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1484 transitions. [2022-01-31 18:32:37,559 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1484 transitions. Word has length 982 [2022-01-31 18:32:37,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:32:37,560 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 1484 transitions. [2022-01-31 18:32:37,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 3.024) internal successors, (378), 124 states have internal predecessors, (378), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:32:37,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1484 transitions. [2022-01-31 18:32:37,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 991 [2022-01-31 18:32:37,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:32:37,564 INFO L514 BasicCegarLoop]: trace histogram [123, 122, 122, 122, 122, 122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:32:37,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 18:32:37,565 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:32:37,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:32:37,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1291739498, now seen corresponding path program 122 times [2022-01-31 18:32:37,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:32:37,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324317221] [2022-01-31 18:32:37,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:32:37,567 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:32:37,567 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:32:37,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:32:37,599 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:32:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:42,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:32:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:32:42,347 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:32:42,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324317221] [2022-01-31 18:32:42,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1324317221] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:32:42,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:32:42,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 18:32:42,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725845429] [2022-01-31 18:32:42,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:32:42,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 18:32:42,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:32:42,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 18:32:42,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 18:32:42,351 INFO L87 Difference]: Start difference. First operand 1116 states and 1484 transitions. Second operand has 126 states, 126 states have (on average 3.0238095238095237) internal successors, (381), 125 states have internal predecessors, (381), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:32:54,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:32:54,531 INFO L93 Difference]: Finished difference Result 1508 states and 1885 transitions. [2022-01-31 18:32:54,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 18:32:54,532 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 3.0238095238095237) internal successors, (381), 125 states have internal predecessors, (381), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 990 [2022-01-31 18:32:54,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:32:54,533 INFO L225 Difference]: With dead ends: 1508 [2022-01-31 18:32:54,533 INFO L226 Difference]: Without dead ends: 1131 [2022-01-31 18:32:54,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 18:32:54,536 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5767 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1518 mSolverCounterSat, 803 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5768 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 2321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 803 IncrementalHoareTripleChecker+Valid, 1518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:32:54,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5768 Valid, 35 Invalid, 2321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [803 Valid, 1518 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:32:54,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-01-31 18:32:55,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1125. [2022-01-31 18:32:55,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1119 states have (on average 1.3324396782841823) internal successors, (1491), 1119 states have internal predecessors, (1491), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:32:55,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1496 transitions. [2022-01-31 18:32:55,183 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1496 transitions. Word has length 990 [2022-01-31 18:32:55,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:32:55,183 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 1496 transitions. [2022-01-31 18:32:55,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 3.0238095238095237) internal successors, (381), 125 states have internal predecessors, (381), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:32:55,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1496 transitions. [2022-01-31 18:32:55,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 999 [2022-01-31 18:32:55,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:32:55,188 INFO L514 BasicCegarLoop]: trace histogram [124, 123, 123, 123, 123, 123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:32:55,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 18:32:55,188 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:32:55,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:32:55,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1834470382, now seen corresponding path program 123 times [2022-01-31 18:32:55,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:32:55,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248316457] [2022-01-31 18:32:55,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:32:55,190 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:32:55,190 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:32:55,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:32:55,246 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:32:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:33:00,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:33:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:33:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:33:00,145 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:33:00,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248316457] [2022-01-31 18:33:00,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [248316457] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:33:00,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:33:00,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 18:33:00,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900776266] [2022-01-31 18:33:00,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:33:00,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 18:33:00,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:33:00,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 18:33:00,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 18:33:00,147 INFO L87 Difference]: Start difference. First operand 1125 states and 1496 transitions. Second operand has 127 states, 127 states have (on average 3.0236220472440944) internal successors, (384), 126 states have internal predecessors, (384), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:33:11,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:33:11,698 INFO L93 Difference]: Finished difference Result 1520 states and 1900 transitions. [2022-01-31 18:33:11,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 18:33:11,698 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 3.0236220472440944) internal successors, (384), 126 states have internal predecessors, (384), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 998 [2022-01-31 18:33:11,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:33:11,699 INFO L225 Difference]: With dead ends: 1520 [2022-01-31 18:33:11,699 INFO L226 Difference]: Without dead ends: 1140 [2022-01-31 18:33:11,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 18:33:11,702 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5962 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 827 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5963 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 827 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:33:11,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5963 Valid, 40 Invalid, 2367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [827 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:33:11,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-01-31 18:33:12,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 1134. [2022-01-31 18:33:12,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1128 states have (on average 1.3324468085106382) internal successors, (1503), 1128 states have internal predecessors, (1503), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:33:12,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1508 transitions. [2022-01-31 18:33:12,305 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1508 transitions. Word has length 998 [2022-01-31 18:33:12,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:33:12,305 INFO L470 AbstractCegarLoop]: Abstraction has 1134 states and 1508 transitions. [2022-01-31 18:33:12,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 3.0236220472440944) internal successors, (384), 126 states have internal predecessors, (384), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:33:12,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1508 transitions. [2022-01-31 18:33:12,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1007 [2022-01-31 18:33:12,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:33:12,310 INFO L514 BasicCegarLoop]: trace histogram [125, 124, 124, 124, 124, 124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:33:12,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 18:33:12,310 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:33:12,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:33:12,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1608366442, now seen corresponding path program 124 times [2022-01-31 18:33:12,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:33:12,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203577310] [2022-01-31 18:33:12,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:33:12,312 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:33:12,312 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:33:12,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:33:12,351 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:33:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:33:17,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:33:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:33:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:33:17,143 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:33:17,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203577310] [2022-01-31 18:33:17,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1203577310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:33:17,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:33:17,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 18:33:17,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705759263] [2022-01-31 18:33:17,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:33:17,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 18:33:17,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:33:17,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 18:33:17,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 18:33:17,146 INFO L87 Difference]: Start difference. First operand 1134 states and 1508 transitions. Second operand has 128 states, 128 states have (on average 3.0234375) internal successors, (387), 127 states have internal predecessors, (387), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:33:29,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:33:29,514 INFO L93 Difference]: Finished difference Result 1532 states and 1915 transitions. [2022-01-31 18:33:29,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 18:33:29,514 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 3.0234375) internal successors, (387), 127 states have internal predecessors, (387), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1006 [2022-01-31 18:33:29,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:33:29,516 INFO L225 Difference]: With dead ends: 1532 [2022-01-31 18:33:29,516 INFO L226 Difference]: Without dead ends: 1149 [2022-01-31 18:33:29,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 18:33:29,519 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4733 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4734 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 677 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:33:29,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4734 Valid, 65 Invalid, 2279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [677 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:33:29,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-01-31 18:33:30,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1143. [2022-01-31 18:33:30,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1137 states have (on average 1.3324538258575198) internal successors, (1515), 1137 states have internal predecessors, (1515), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:33:30,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1520 transitions. [2022-01-31 18:33:30,112 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 1520 transitions. Word has length 1006 [2022-01-31 18:33:30,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:33:30,112 INFO L470 AbstractCegarLoop]: Abstraction has 1143 states and 1520 transitions. [2022-01-31 18:33:30,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 3.0234375) internal successors, (387), 127 states have internal predecessors, (387), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:33:30,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 1520 transitions. [2022-01-31 18:33:30,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1015 [2022-01-31 18:33:30,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:33:30,137 INFO L514 BasicCegarLoop]: trace histogram [126, 125, 125, 125, 125, 125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:33:30,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 18:33:30,137 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:33:30,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:33:30,137 INFO L85 PathProgramCache]: Analyzing trace with hash -2019996142, now seen corresponding path program 125 times [2022-01-31 18:33:30,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:33:30,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182297028] [2022-01-31 18:33:30,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:33:30,139 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:33:30,139 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:33:30,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:33:30,173 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:33:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat